{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,27]],"date-time":"2026-09-27T10:46:25Z","timestamp":1790505985613,"version":"4.1.0"},"reference-count":97,"publisher":"MDPI AG","issue":"5","license":[{"start":{"date-parts":[[2020,2,27]],"date-time":"2020-02-27T00:00:00Z","timestamp":1582761600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001659","name":"Deutsche Forschungsgemeinschaft","doi-asserted-by":"publisher","award":["KL 1824\/12-1"],"award-info":[{"award-number":["KL 1824\/12-1"]}],"id":[{"id":"10.13039\/501100001659","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100008316","name":"Baden-W\u00fcrttemberg Stiftung","doi-asserted-by":"publisher","award":["CT3"],"award-info":[{"award-number":["CT3"]}],"id":[{"id":"10.13039\/100008316","id-type":"DOI","asserted-by":"publisher"}]},{"name":"National Science Center Poland","award":["UMO-2016\/23\/G\/ST5\/04200"],"award-info":[{"award-number":["UMO-2016\/23\/G\/ST5\/04200"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Molecules"],"abstract":"Downsizing well-established materials to the nanoscale is a key route to novel functionalities, in particular if different functionalities are merged in hybrid nanomaterials. Hybrid carbon-based hierarchical nanostructures are particularly promising for electrochemical energy storage since they combine benefits of nanosize effects, enhanced electrical conductivity and integrity of bulk materials. We show that endohedral multiwalled carbon nanotubes (CNT) encapsulating high-capacity (here: conversion and alloying) electrode materials have a high potential for use in anode materials for lithium-ion batteries (LIB). There are two essential characteristics of filled CNT relevant for application in electrochemical energy storage: (1) rigid hollow cavities of the CNT provide upper limits for nanoparticles in their inner cavities which are both separated from the fillings of other CNT and protected against degradation. In particular, the CNT shells resist strong volume changes of encapsulates in response to electrochemical cycling, which in conventional conversion and alloying materials hinders application in energy storage devices. (2) Carbon mantles ensure electrical contact to the active material as they are unaffected by potential cracks of the encapsulate and form a stable conductive network in the electrode compound. Our studies confirm that encapsulates are electrochemically active and can achieve full theoretical reversible capacity. The results imply that encapsulating nanostructures inside CNT can provide a route to new high-performance nanocomposite anode materials for LIB.<\/jats:p>","DOI":"10.3390\/molecules25051064","type":"journal-article","created":{"date-parts":[[2020,3,2]],"date-time":"2020-03-02T07:52:35Z","timestamp":1583135555000},"page":"1064","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":33,"title":["Filled Carbon Nanotubes as Anode Materials for Lithium-Ion Batteries"],"prefix":"10.3390","volume":"25","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6584-6056","authenticated-orcid":false,"given":"Elisa","family":"Thauer","sequence":"first","affiliation":[{"name":"Kirchhoff Institute for Physics, Heidelberg University, INF 227, 69120 Heidelberg, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alexander","family":"Ottmann","sequence":"additional","affiliation":[{"name":"Kirchhoff Institute for Physics, Heidelberg University, INF 227, 69120 Heidelberg, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Philip","family":"Schneider","sequence":"additional","affiliation":[{"name":"Kirchhoff Institute for Physics, Heidelberg University, INF 227, 69120 Heidelberg, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lucas","family":"M\u00f6ller","sequence":"additional","affiliation":[{"name":"Kirchhoff Institute for Physics, Heidelberg University, INF 227, 69120 Heidelberg, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lukas","family":"Deeg","sequence":"additional","affiliation":[{"name":"Kirchhoff Institute for Physics, Heidelberg University, INF 227, 69120 Heidelberg, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rouven","family":"Zeus","sequence":"additional","affiliation":[{"name":"Kirchhoff Institute for Physics, Heidelberg University, INF 227, 69120 Heidelberg, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Florian","family":"Wilhelmi","sequence":"additional","affiliation":[{"name":"Kirchhoff Institute for Physics, Heidelberg University, INF 227, 69120 Heidelberg, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lucas","family":"Schlestein","sequence":"additional","affiliation":[{"name":"Kirchhoff Institute for Physics, Heidelberg University, INF 227, 69120 Heidelberg, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8108-5795","authenticated-orcid":false,"given":"Christoph","family":"Neef","sequence":"additional","affiliation":[{"name":"Kirchhoff Institute for Physics, Heidelberg University, INF 227, 69120 Heidelberg, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rasha","family":"Ghunaim","sequence":"additional","affiliation":[{"name":"Leibniz Institute for Solid State and Materials Research (IFW) Dresden, 01069 Dresden, Germany"},{"name":"Department of Applied Chemistry, Palestine Polytechnic University, Hebron P.O. 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Soc. Rev."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"1402225","DOI":"10.1002\/aenm.201402225","article-title":"Research Progress on Negative Electrodes for Practical Li-Ion Batteries: Beyond Carbonaceous Anodes","volume":"5","author":"Aravindan","year":"2015","journal-title":"Adv. Energy Mater."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"1600374","DOI":"10.1002\/aenm.201600374","article-title":"Nanostructured Anode Materials for Lithium Ion Batteries: Progress, Challenge and Perspective","volume":"6","author":"Mahmood","year":"2016","journal-title":"Adv. Energy Mater."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"23914","DOI":"10.1039\/C4RA02686A","article-title":"Recent advances in Mn-based oxides as anode materials for lithium ion batteries","volume":"4","author":"Deng","year":"2014","journal-title":"RSC Adv."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"366","DOI":"10.1038\/nmat1368","article-title":"Nanostructured materials for advanced energy conversion and storage devices","volume":"4","author":"Arico","year":"2005","journal-title":"Nat. Mater."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"191","DOI":"10.1016\/S1466-6049(01)00026-5","article-title":"Nanostructured materials for energy storage","volume":"3","author":"Nazar","year":"2001","journal-title":"Int. J. Inorg. Mater."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"652","DOI":"10.1038\/451652a","article-title":"Building better batteries","volume":"451","author":"Armand","year":"2008","journal-title":"Nature"},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"421","DOI":"10.1016\/j.jpowsour.2013.11.103","article-title":"Review on recent progress of nanostructured anode materials for Li-ion batteries","volume":"257","author":"Goriparti","year":"2014","journal-title":"J. Power Sources"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"2682","DOI":"10.1039\/c0ee00699h","article-title":"Recent developments in nanostructured anode materials for rechargeable lithium-ion batteries","volume":"4","author":"Ji","year":"2011","journal-title":"Energy Environ. Sci."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"1490","DOI":"10.1002\/anie.201409530","article-title":"A hierarchical tin\/carbon composite as an anode for lithium-ion batteries with a long cycle life","volume":"54","author":"Huang","year":"2015","journal-title":"Angew. Chem. Int. Ed. Engl."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"1741","DOI":"10.1002\/smll.201303818","article-title":"Hierarchical tubular structures constructed by carbon-coated \u03b1-Fe2O3 nanorods for highly reversible lithium storage","volume":"10","author":"Gao","year":"2014","journal-title":"Small"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"964","DOI":"10.1002\/adma.201304120","article-title":"Three-dimensional assembly of single-layered MoS(2)","volume":"26","author":"Wang","year":"2014","journal-title":"Adv. Mater."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"3987","DOI":"10.1039\/C6TA10439H","article-title":"Preparation of hierarchical C@MoS2@C sandwiched hollow spheres for lithium ion batteries","volume":"5","author":"Li","year":"2017","journal-title":"J. Mater. Chem. A"},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"7553","DOI":"10.1039\/C8TA12293H","article-title":"Hierarchical MoS 2 \u2013carbon porous nanorods towards atomic interfacial engineering for high-performance lithium storage","volume":"7","author":"Li","year":"2019","journal-title":"J. Mater. Chem. A"},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"2868","DOI":"10.1021\/cm900613d","article-title":"One-Pot Synthesis of Carbon-Coated SnO2 Nanocolloids with Improved Reversible Lithium Storage Properties","volume":"21","author":"Lou","year":"2009","journal-title":"Chem. Mater."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"6","DOI":"10.1016\/j.matchemphys.2016.09.017","article-title":"Fabrication of flower-like tin\/carbon composite microspheres as long-lasting anode materials for lithium ion batteries","volume":"185","author":"Kang","year":"2017","journal-title":"Mater. Chem. Phys."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"31","DOI":"10.1016\/j.matchemphys.2018.09.061","article-title":"Superior Li-ion storage performance of graphene decorated NiO nanowalls on Ni as anode for lithium ion batteries","volume":"222","author":"Chen","year":"2019","journal-title":"Mater. Chem. Phys."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"2263","DOI":"10.1021\/jp408021m","article-title":"Graphene-Wrapped Mesoporous Cobalt Oxide Hollow Spheres Anode for High-Rate and Long-Life Lithium Ion Batteries","volume":"118","author":"Sun","year":"2014","journal-title":"J. Phys. Chem. C"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"11078","DOI":"10.1002\/chem.201402359","article-title":"Macroporous Fe3O4\/carbon composite microspheres with a short Li+ diffusion pathway for the fast charge\/discharge of lithium ion batteries","volume":"20","author":"Choi","year":"2014","journal-title":"Chemistry"},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"139","DOI":"10.1002\/chem.201303175","article-title":"Confined nanospace pyrolysis for the fabrication of coaxial Fe3O4@C hollow particles with a penetrated mesochannel as a superior anode for Li-ion batteries","volume":"20","author":"Lei","year":"2014","journal-title":"Chemistry"},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"85","DOI":"10.1016\/j.jpowsour.2013.11.030","article-title":"Fe2O3 nanorods\/carbon nanofibers composite: Preparation and performance as anode of high rate lithium ion battery","volume":"251","author":"Wu","year":"2014","journal-title":"J. Power Sources"},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"172","DOI":"10.1016\/j.nanoen.2014.09.012","article-title":"Enhanced electrochemical performance of MnO nanowire\/graphene composite during cycling as the anode material for lithium-ion batteries","volume":"10","author":"Zhang","year":"2014","journal-title":"Nano Energy"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"702","DOI":"10.1016\/j.jallcom.2019.05.147","article-title":"Ultrathin NiO confined within hollow carbon sphere for efficient electrochemical energy storage","volume":"797","author":"Shi","year":"2019","journal-title":"J. Alloys Compd."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"3502","DOI":"10.1038\/srep03502","article-title":"Large and fast reversible Li-ion storages in Fe2O3-graphene sheet-on-sheet sandwich-like nanocomposites","volume":"3","author":"Kan","year":"2013","journal-title":"Sci. Rep."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"452","DOI":"10.1016\/j.electacta.2013.12.018","article-title":"In Situ Hydrothermal Synthesis of Mn3O4 Nanoparticles on Nitrogen-doped Graphene as High-Performance Anode materials for Lithium Ion Batteries","volume":"120","author":"Park","year":"2014","journal-title":"Electrochim. Acta"},{"key":"ref_26","doi-asserted-by":"crossref","unstructured":"Zakharova, G.S., Ottmann, A., M\u00f6ller, L., Andreikov, E.I., Fattakhova, Z.A., Puzyrev, I.S., Zhu, Q., Thauer, E., and Klingeler, R. (2018). TiO2\/C nanocomposites prepared by thermal annealing of titanium glycerolate as anode materials for lithium-ion batteries. J. Mater. Sci., 53.","DOI":"10.1007\/s10853-018-2488-9"},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"100","DOI":"10.1016\/j.energy.2016.02.063","article-title":"Hollow carbon sphere\/metal oxide nanocomposites anodes for lithium-ion batteries","volume":"103","author":"Wenelska","year":"2016","journal-title":"Energy"},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"5958","DOI":"10.1021\/cm502690u","article-title":"CoO Hollow Cube\/Reduced Graphene Oxide Composites with Enhanced Lithium Storage Capability","volume":"26","author":"Guan","year":"2014","journal-title":"Chem. Mater."},{"key":"ref_29","unstructured":"(2019, January 18). Avogadro: An Open-Source Molecular Builder and Visualization Tool, 2.0. Available online: http:\/\/avogadro.cc\/."},{"key":"ref_30","unstructured":"Ottmann, A. (2018). Nanostrukturierte Kohlenstoff-Komposite und Ammoniumvanadate als Elektrodenmaterialien f\u00fcr Lithium-Ionen-Batterien. [Ph.D. Thesis, Ruprecht-Karls-Universit\u00e4t]."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"218","DOI":"10.1016\/S0039-6028(01)01558-8","article-title":"Carbon nanotubes: Opportunities and challenges","volume":"500","author":"Dai","year":"2002","journal-title":"Surf. Sci."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"185","DOI":"10.1016\/j.cplett.2015.06.072","article-title":"Carbon nanotubes decorated by mesoporous cobalt oxide as electrode material for lithium-ion batteries","volume":"635","author":"Wenelska","year":"2015","journal-title":"Chem. Phys. Lett."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"278","DOI":"10.1016\/j.cplett.2018.11.053","article-title":"Rapid synthesis of ultrafine NiCo2O4 nanoparticles loaded carbon nanotubes for lithium ion battery anode materials","volume":"715","author":"Zhang","year":"2019","journal-title":"Chem. Phys. Lett."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"499","DOI":"10.1186\/1556-276X-8-499","article-title":"CNT@TiO2 nanohybrids for high-performance anode of lithium-ion batteries","volume":"8","author":"Wen","year":"2013","journal-title":"Nanoscale Res. Lett."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"2555","DOI":"10.1021\/am3031536","article-title":"MoO2\/multiwalled carbon nanotubes (MWCNT) hybrid for use as a Li-ion battery anode","volume":"5","author":"Bhaskar","year":"2013","journal-title":"ACS Appl. Mater. Interfaces"},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"496","DOI":"10.1038\/35035045","article-title":"Nano-sized transition-metal oxides as negative-electrode materials for lithium-ion batteries","volume":"407","author":"Poizot","year":"2000","journal-title":"Nature"},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"725","DOI":"10.1002\/(SICI)1521-4095(199807)10:10<725::AID-ADMA725>3.0.CO;2-Z","article-title":"Insertion Electrode Materials for Rechargeable Lithium Batteries","volume":"10","author":"Winter","year":"1998","journal-title":"Adv. Mater."},{"key":"ref_38","doi-asserted-by":"crossref","unstructured":"Tsang, S.C., Chen, Y.K., Harris, P.J.F., and Green, M.L.H. (1994). A simple chemical method of opening and filling carbon nanotubes. Nature, 159\u2013162.","DOI":"10.1038\/372159a0"},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"2707","DOI":"10.1021\/cg400405k","article-title":"Facile Nanotube-Assisted Synthesis of Ternary Intermetallic Nanocrystals of the Ferromagnetic Heusler Phase Co2FeGa: Supporting Information","volume":"13","author":"Gellesch","year":"2013","journal-title":"Cryst. Growth Des."},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"262","DOI":"10.1186\/s11671-015-0971-7","article-title":"Composition, Electronic and Magnetic Investigation of the Encapsulated ZnFe2O4 Nanoparticles in Multiwall Carbon Nanotubes Containing Ni Residuals","volume":"10","author":"Maekawa","year":"2015","journal-title":"Nanoscale Res. Lett."},{"key":"ref_41","doi-asserted-by":"crossref","unstructured":"Ghunaim, R., Damm, C., Wolf, D., Lubk, A., B\u00fcchner, B., Mertig, M., and Hampel, S. (2018). Fe1-xNix Alloy Nanoparticles Encapsulated Inside Carbon Nanotubes: Controlled Synthesis, Structure and Magnetic Properties. Nanomaterials, 8.","DOI":"10.3390\/nano8080576"},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"1255","DOI":"10.1039\/C7TC04618A","article-title":"Carbon nanotube-assisted synthesis of ferromagnetic Heusler nanoparticles of Fe 3 Ga (Nano-Galfenol)","volume":"6","author":"Ghunaim","year":"2018","journal-title":"J. Mater. Chem. C"},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"1024","DOI":"10.3762\/bjnano.9.95","article-title":"Single-crystalline FeCo nanoparticle-filled carbon nanotubes: Synthesis, structural characterization and magnetic properties","volume":"9","author":"Ghunaim","year":"2018","journal-title":"Beilstein J. Nanotechnol."},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"352","DOI":"10.1016\/j.carbon.2016.01.098","article-title":"Tailored nanoparticles and wires of Sn, Ge and Pb inside carbon nanotubes","volume":"101","author":"Haft","year":"2016","journal-title":"Carbon"},{"key":"ref_45","doi-asserted-by":"crossref","first-page":"13625","DOI":"10.1038\/s41598-017-14014-7","article-title":"Electrochemical Magnetization Switching and Energy Storage in Manganese Oxide filled Carbon Nanotubes","volume":"7","author":"Ottmann","year":"2017","journal-title":"Sci. Rep."},{"key":"ref_46","doi-asserted-by":"crossref","first-page":"15","DOI":"10.1007\/BF01163155","article-title":"Crystal structure refinement and reflectance measurements of hausmannite, Mn3O4","volume":"37","author":"Jarosch","year":"1987","journal-title":"Mineral. Petrol."},{"key":"ref_47","doi-asserted-by":"crossref","first-page":"383","DOI":"10.1016\/S1293-2558(03)00011-6","article-title":"Structural and morphological characterization of FeCo2O4 and CoFe2O4 spinels prepared by a coprecipitation method","volume":"5","author":"Ferreira","year":"2003","journal-title":"Solid State Sci."},{"key":"ref_48","doi-asserted-by":"crossref","first-page":"733","DOI":"10.1016\/j.carbon.2018.02.092","article-title":"3d transition metals and oxides within carbon nanotubes by co-pyrolysis of metallocene & camphor: High filling efficiency and self-organized structures","volume":"132","author":"Kapoor","year":"2018","journal-title":"Carbon"},{"key":"ref_49","unstructured":"Heider, R. (2015). Nanoskalige Sn-Co-Verbindungen Durch F\u00fcllen von CNT. [Master Thesis, BTU Cottbus-Senftenberg]."},{"key":"ref_50","doi-asserted-by":"crossref","first-page":"1775","DOI":"10.1016\/S0008-6223(02)00045-3","article-title":"Electrochemical storage of energy in carbon nanotubes and nanostructured carbons","volume":"40","author":"Frackowiak","year":"2002","journal-title":"Carbon"},{"key":"ref_51","doi-asserted-by":"crossref","first-page":"2976","DOI":"10.1016\/j.carbon.2009.06.045","article-title":"Flexible free-standing carbon nanotube films for model lithium-ion batteries","volume":"47","author":"Chew","year":"2009","journal-title":"Carbon"},{"key":"ref_52","doi-asserted-by":"crossref","first-page":"1138","DOI":"10.3390\/ma6031138","article-title":"Applications of Carbon Nanotubes for Lithium Ion Battery Anodes","volume":"6","author":"Xiong","year":"2013","journal-title":"Materials"},{"key":"ref_53","doi-asserted-by":"crossref","first-page":"1520","DOI":"10.1016\/j.elecom.2010.08.023","article-title":"Electrode reactions of manganese oxides for secondary lithium batteries","volume":"12","author":"Fang","year":"2010","journal-title":"Electrochem. Commun."},{"key":"ref_54","doi-asserted-by":"crossref","first-page":"3300","DOI":"10.1016\/j.jpowsour.2009.11.133","article-title":"MnO powder as anode active materials for lithium ion batteries","volume":"195","author":"Zhong","year":"2010","journal-title":"J. Power Sources"},{"key":"ref_55","doi-asserted-by":"crossref","first-page":"776","DOI":"10.1103\/PhysRev.44.776","article-title":"The Magnetic Susceptibility of MnO as a Function of the Temperature","volume":"44","author":"Tyler","year":"1933","journal-title":"Phys. Rev."},{"key":"ref_56","doi-asserted-by":"crossref","first-page":"16755","DOI":"10.1039\/C4TA03532A","article-title":"Facile synthesis of mesoporous Mn3O4 nanorods as a promising anode material for high performance lithium-ion batteries","volume":"2","author":"Bai","year":"2014","journal-title":"J. Mater. Chem. A"},{"key":"ref_57","doi-asserted-by":"crossref","first-page":"3600","DOI":"10.1039\/c2jm15075a","article-title":"Rapid microwave-assisted synthesis of Mn3O4\u2013graphene nanocomposite and its lithium storage properties","volume":"22","author":"Li","year":"2012","journal-title":"J. Mater. Chem."},{"key":"ref_58","doi-asserted-by":"crossref","first-page":"110","DOI":"10.1016\/j.matlet.2012.04.056","article-title":"Mn3O4 nanocrystals anchored on multi-walled carbon nanotubes as high-performance anode materials for lithium-ion batteries","volume":"80","author":"Wang","year":"2012","journal-title":"Mater. Lett."},{"key":"ref_59","doi-asserted-by":"crossref","first-page":"463","DOI":"10.1016\/j.jpowsour.2013.10.133","article-title":"Mn3O4 nanoparticles anchored on continuous carbon nanotube network as superior anodes for lithium ion batteries","volume":"249","author":"Luo","year":"2014","journal-title":"J. Power Sources"},{"key":"ref_60","doi-asserted-by":"crossref","first-page":"14238","DOI":"10.1021\/jp074142s","article-title":"High-Performance Transition Metal Mixed Oxides in Conversion Electrodes: A Combined Spectroscopic and Electrochemical Study","volume":"111","author":"Lavela","year":"2007","journal-title":"J. Phys. Chem. C"},{"key":"ref_61","doi-asserted-by":"crossref","first-page":"74","DOI":"10.1016\/j.jpowsour.2012.02.013","article-title":"A review of application of carbon nanotubes for lithium ion battery anode material","volume":"208","author":"Li","year":"2012","journal-title":"J. Power Sources"},{"key":"ref_62","doi-asserted-by":"crossref","first-page":"3303","DOI":"10.1016\/j.jpowsour.2010.11.101","article-title":"Study of multi-walled carbon nanotubes for lithium-ion battery electrodes","volume":"196","author":"Varzi","year":"2011","journal-title":"J. Power Sources"},{"key":"ref_63","doi-asserted-by":"crossref","first-page":"4915","DOI":"10.1016\/j.electacta.2004.06.012","article-title":"Cobalt ferrite thin films as anode material for lithium ion batteries","volume":"49","author":"Chu","year":"2004","journal-title":"Electrochim. Acta"},{"key":"ref_64","doi-asserted-by":"crossref","first-page":"6332","DOI":"10.1016\/j.electacta.2010.05.072","article-title":"A review of the features and analyses of the solid electrolyte interphase in Li-ion batteries","volume":"55","author":"Verma","year":"2010","journal-title":"Electrochim. Acta"},{"key":"ref_65","doi-asserted-by":"crossref","first-page":"831","DOI":"10.1016\/j.matchemphys.2011.08.060","article-title":"Electrochemical properties of Super P carbon black as an anode active material for lithium-ion batteries","volume":"130","author":"Gnanamuthu","year":"2011","journal-title":"Mater. Chem. Phys."},{"key":"ref_66","doi-asserted-by":"crossref","first-page":"E170","DOI":"10.1002\/adma.201000717","article-title":"Beyond intercalation-based Li-ion batteries: The state of the art and challenges of electrode materials reacting through conversion reactions","volume":"22","author":"Cabana","year":"2010","journal-title":"Adv. Mater."},{"key":"ref_67","doi-asserted-by":"crossref","first-page":"55402","DOI":"10.1088\/0957-4484\/23\/5\/055402","article-title":"Hollow CoFe2O4 nanospheres as a high capacity anode material for lithium ion batteries","volume":"23","author":"Wang","year":"2012","journal-title":"Nanotechnology"},{"key":"ref_68","doi-asserted-by":"crossref","first-page":"24","DOI":"10.1016\/j.ssi.2012.03.044","article-title":"CoFe2O4\/C composite fibers as anode materials for lithium-ion batteries with stable and high electrochemical performance","volume":"215","author":"Wu","year":"2012","journal-title":"Solid State Ion."},{"key":"ref_69","doi-asserted-by":"crossref","first-page":"289","DOI":"10.1016\/j.jpowsour.2015.02.138","article-title":"Porous carbon nanotubes decorated with nanosized cobalt ferrite as anode materials for high-performance lithium-ion batteries","volume":"283","author":"Wang","year":"2015","journal-title":"J. Power Sources"},{"key":"ref_70","doi-asserted-by":"crossref","first-page":"7444","DOI":"10.1039\/c3ta10762k","article-title":"Mesoporous CoFe2O4 nanospheres cross-linked by carbon nanotubes as high-performance anodes for lithium-ion batteries","volume":"1","author":"Zhang","year":"2013","journal-title":"J. Mater. Chem. A"},{"key":"ref_71","doi-asserted-by":"crossref","first-page":"205","DOI":"10.1016\/j.jpowsour.2014.03.012","article-title":"A facile synthesis of encapsulated CoFe2O4 into carbon nanofibres and its application as conversion anodes for lithium ion batteries","volume":"260","author":"Ren","year":"2014","journal-title":"J. Power Sources"},{"key":"ref_72","doi-asserted-by":"crossref","first-page":"238","DOI":"10.1016\/j.nanoen.2018.03.053","article-title":"Electrostatic interaction in electrospun nanofibers: Double-layer carbon protection of CoFe2O4 nanosheets enabling ultralong-life and ultrahigh-rate lithium ion storage","volume":"48","author":"Zhang","year":"2018","journal-title":"Nano Energy"},{"key":"ref_73","doi-asserted-by":"crossref","first-page":"A627","DOI":"10.1149\/1.1467947","article-title":"On the Origin of the Extra Electrochemical Capacity Displayed by MO\/Li Cells at Low Potential","volume":"149","author":"Laruelle","year":"2002","journal-title":"J. Electrochem. Soc."},{"key":"ref_74","doi-asserted-by":"crossref","first-page":"5215","DOI":"10.1039\/b309130a","article-title":"Nanocrystallinity effects in lithium battery materials","volume":"5","author":"Jamnik","year":"2003","journal-title":"Phys. Chem. Chem. Phys."},{"key":"ref_75","doi-asserted-by":"crossref","first-page":"A1643","DOI":"10.1149\/1.1622959","article-title":"Combined XRD, EXAFS, and M\u00f6ssbauer Studies of the Reduction by Lithium of \u03b1-Fe2O3 with Various Particle Sizes","volume":"150","author":"Larcher","year":"2003","journal-title":"J. Electrochem. Soc."},{"key":"ref_76","doi-asserted-by":"crossref","first-page":"A133","DOI":"10.1149\/1.1528941","article-title":"Effect of Particle Size on Lithium Intercalation into \u03b1-Fe2O3","volume":"150","author":"Larcher","year":"2003","journal-title":"J. Electrochem. Soc."},{"key":"ref_77","doi-asserted-by":"crossref","first-page":"A1748","DOI":"10.1149\/1.1972812","article-title":"Synthesis and Characterization of Nanometric Iron and Iron-Titanium Oxides by Mechanical Milling","volume":"152","author":"Morales","year":"2005","journal-title":"J. Electrochem. Soc."},{"key":"ref_78","doi-asserted-by":"crossref","first-page":"12198","DOI":"10.1039\/c2jm31053h","article-title":"Electrospun \u03b1-Fe2O3 nanorods as a stable, high capacity anode material for Li-ion batteries","volume":"22","author":"Cherian","year":"2012","journal-title":"J. Mater. Chem."},{"key":"ref_79","doi-asserted-by":"crossref","first-page":"A132","DOI":"10.1149\/1.3458648","article-title":"Lithium Storage Using Conversion Reaction in Maghemite and Hematite","volume":"13","author":"Hariharan","year":"2010","journal-title":"Electrochem. Solid State Lett."},{"key":"ref_80","doi-asserted-by":"crossref","first-page":"3347","DOI":"10.1111\/j.1151-2916.1999.tb02250.x","article-title":"Spinel Electrodes for Lithium Batteries","volume":"82","author":"Thackeray","year":"1999","journal-title":"J. Am. Ceram. Soc."},{"key":"ref_81","doi-asserted-by":"crossref","first-page":"785","DOI":"10.1016\/0025-5408(82)90029-0","article-title":"Structural characterization of the lithiated iron oxides LixFe3O4 and LixFe2O3 (0