{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,18]],"date-time":"2026-08-18T04:53:33Z","timestamp":1787028813210,"version":"build-2736575974"},"reference-count":34,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2021,5,10]],"date-time":"2021-05-10T00:00:00Z","timestamp":1620604800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Korea Ministry of Environment","award":["2016002220004"],"award-info":[{"award-number":["2016002220004"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>As the explosive growth of the electric vehicle market leads to an increase in spent lithium-ion batteries (LIBs), the disposal of LIBs has also made headlines. In this study, we synthesized the cathode active materials Li[Ni1\/3Mn1\/3Co1\/3]O2 (NMC) and Li[Ni1\/3Mn1\/3Co1\/3Fe0.0005Al0.0005]O2 (NMCFA) via hydroxide co-precipitation and calcination processes, which simulate the resynthesis of NMC in leachate containing trace amounts of iron and aluminum from spent LIBs. The effects of iron and aluminum on the physicochemical and electrochemical properties were investigated and compared with NMC. Trace amounts of iron and aluminum do not affect the morphology, the formation of O3-type layered structures, or the redox peak. On the other hand, the rate capability of NMCFA shows high discharge capacities at 7 C (110 mAh g\u22121) and 10 C (74 mAh g\u22121), comparable to the values for NMC at 5 C (111 mAh g\u22121) and 7 C (79 mAh g\u22121), respectively, due to the widened interslab thickness of NMCFA which facilitates the movement of lithium ions in a 2D channel. Therefore, iron and aluminum, which are usually considered as impurities in the recycling of LIBs, could be used as doping elements for enhancing the electrochemical performance of resynthesized cathode active materials.<\/jats:p>","DOI":"10.3390\/ma14092464","type":"journal-article","created":{"date-parts":[[2021,5,10]],"date-time":"2021-05-10T10:49:51Z","timestamp":1620643791000},"page":"2464","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":29,"title":["Effect of Residual Trace Amounts of Fe and Al in Li[Ni1\/3Mn1\/3Co1\/3]O2 Cathode Active Material for the Sustainable Recycling of Lithium-Ion Batteries"],"prefix":"10.3390","volume":"14","author":[{"given":"Seongdeock","family":"Jeong","sequence":"first","affiliation":[{"name":"Department of Energy &amp; Mineral Resources Engineering, Sejong University, Seoul 05006, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sanghyuk","family":"Park","sequence":"additional","affiliation":[{"name":"Department of Energy &amp; Mineral Resources Engineering, Sejong University, Seoul 05006, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mincheol","family":"Beak","sequence":"additional","affiliation":[{"name":"Department of Energy &amp; Mineral Resources Engineering, Sejong University, Seoul 05006, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jangho","family":"Park","sequence":"additional","affiliation":[{"name":"Department of Energy &amp; Mineral Resources Engineering, Sejong University, Seoul 05006, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3507-7919","authenticated-orcid":false,"given":"Jeong-Soo","family":"Sohn","sequence":"additional","affiliation":[{"name":"Mineral Resources Research Division, Resources Recovery Research Center, Korea Institute of Geoscience and Mineral Resources, Daejeon 34132, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1670-4347","authenticated-orcid":false,"given":"Kyungjung","family":"Kwon","sequence":"additional","affiliation":[{"name":"Department of Energy &amp; Mineral Resources Engineering, Sejong University, Seoul 05006, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2021,5,10]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"26","DOI":"10.1038\/s41560-019-0513-0","article-title":"High-nickel layered oxide cathodes for lithium-based automotive batteries","volume":"5","author":"Li","year":"2020","journal-title":"Nat. Energy"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"18138","DOI":"10.1021\/acssuschemeng.0c06514","article-title":"Direct regeneration of LiNi0.5Co0.2Mn0.3O2 cathode from spent lithium-ion batteries by the molten salts method","volume":"8","author":"Jiang","year":"2020","journal-title":"ACS Sustain. Chem. Eng."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"1129","DOI":"10.1080\/10643389.2013.763578","article-title":"Recycling of spent lithium-ion battery: A critical review","volume":"44","author":"Zeng","year":"2014","journal-title":"Crit. Rev. Environ. Sci. Technol."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"1276","DOI":"10.1039\/C4GC01951B","article-title":"LiCoO2: Recycling from spent batteries and regeneration with solid state synthesis","volume":"17","author":"Nie","year":"2015","journal-title":"Green Chem."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"42","DOI":"10.1016\/j.gee.2016.11.010","article-title":"A closed-loop process for recycling LiNixCoyMn(1-x -y)O2 from mixed cathode materials of lithium-ion batteries","volume":"2","author":"Zheng","year":"2017","journal-title":"Green Energy Environ."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"1510","DOI":"10.1016\/j.jpowsour.2005.12.056","article-title":"Analysis of a hydrometallurgical route to recover base metals from spent rechargeable batteries by liquid-liquid extraction with Cyanex 272","volume":"159","author":"Mantuano","year":"2006","journal-title":"J. Power Sources"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"19","DOI":"10.1016\/j.jhazmat.2016.04.080","article-title":"Innovative leaching of cobalt and lithium from spent lithium-ion batteries and simultaneous dechlorination of polyvinyl chloride in subcritical water","volume":"316","author":"Liu","year":"2016","journal-title":"J. Hazard. Mater."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"126329","DOI":"10.1016\/j.jclepro.2021.126329","article-title":"A comprehensive review on the pretreatment process in lithium-ion battery recycling","volume":"294","author":"Kim","year":"2021","journal-title":"J. Clean. Prod."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"512","DOI":"10.1016\/j.jpowsour.2007.11.074","article-title":"A review of processes and technologies for the recycling of lithium-ion secondary batteries","volume":"177","author":"Xu","year":"2008","journal-title":"J. Power Sources"},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"157581","DOI":"10.1016\/j.jallcom.2020.157581","article-title":"Electrochemical effects of residual Al in the resynthesis of Li[Ni1\/3Mn1\/3Co1\/3]O2 cathode materials","volume":"857","author":"Kim","year":"2021","journal-title":"J. Alloys Compd."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"814","DOI":"10.1016\/j.electacta.2018.11.001","article-title":"The effect of Fe as an impurity element for sustainable resynthesis of Li[Ni1\/3Co1\/3Mn1\/3]O-2 cathode material from spent lithium-ion batteries","volume":"296","author":"Park","year":"2019","journal-title":"Electrochim. Acta"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"155342","DOI":"10.1016\/j.jallcom.2020.155342","article-title":"Understanding the role of trace amount of Fe incorporated in Ni-rich Li[Ni1-x-yCoxMny]O2 cathode material","volume":"835","author":"Park","year":"2020","journal-title":"J. Alloys Compd."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"112","DOI":"10.1016\/j.jallcom.2018.06.015","article-title":"Incorporation of Cu into Li[Ni1\/3Co1\/3Mn1\/3]O2 cathode: Elucidating its electrochemical properties and stability","volume":"764","author":"Jo","year":"2018","journal-title":"J. Alloys Compd."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"47","DOI":"10.1016\/j.jpcs.2018.02.043","article-title":"Effects of residual lithium in the precursors of Li[Ni1\/3Co1\/3Mn1\/3]O2 on their lithium-ion battery performance","volume":"118","author":"Jo","year":"2018","journal-title":"J. Phys. Chem. Solids"},{"key":"ref_15","doi-asserted-by":"crossref","unstructured":"Kang, G.H., Lee, K.W., Kwon, K., and Song, J. (2017). The effects of incorporated Sn in resynthesized Ni-rich cathode materials on their lithium-ion battery performance. Metals, 7.","DOI":"10.3390\/met7100395"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"159808","DOI":"10.1016\/j.jallcom.2021.159808","article-title":"Effect of Na from the leachate of spent Li-ion batteries on the properties of resynthesized Li-ion battery cathodes","volume":"873","author":"Beak","year":"2021","journal-title":"J. Alloys Compd."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"4199","DOI":"10.1016\/j.electacta.2005.11.045","article-title":"Comparison of structure and electrochemistry of Al- and Fe-doped LiNi1\/3Co1\/3Mn1\/3O2","volume":"51","author":"Liu","year":"2006","journal-title":"Electrochim. Acta"},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"325","DOI":"10.1016\/j.jpowsour.2007.10.043","article-title":"Effect of equivalent and non-equivalent Al substitutions on the structure and electrochemical properties of LiNi0.5Mn0.5O2","volume":"176","author":"Zhang","year":"2008","journal-title":"J. Power Sources"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"1901","DOI":"10.1021\/cm0511769","article-title":"X-ray\/neutron diffraction and electrochemical studies of lithium De\/Re-intercalation in Li1-xCo1\/3Ni1\/3Mn1\/3O2 (x = 0 \u2192 1)","volume":"18","author":"Yin","year":"2006","journal-title":"Chem. Mater."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"4313","DOI":"10.1016\/j.jpowsour.2010.01.016","article-title":"High rate cycling performance of Li1.05Ni1\/3Co1\/3Mn1\/3O2 materials prepared by sol-gel and co-precipitation methods for lithium-ion batteries","volume":"195","author":"Santhanam","year":"2010","journal-title":"J. Power Sources"},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"233","DOI":"10.1016\/j.electacta.2012.07.069","article-title":"Novel composites Li[LixNi0.34-xMn0.47Co0.19]O2 (0.18\u2264x\u22640.21): Synthesis and application as high-voltage cathode with improved electrochemical performance for lithium ion batteries","volume":"81","author":"Zhang","year":"2012","journal-title":"Electrochim. Acta"},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"1249","DOI":"10.1016\/j.nanoen.2013.06.003","article-title":"Uniform LiNi1\/3Co1\/3Mn1\/3O2 hollow microspheres: Designed synthesis, topotactical structural transformation and their enhanced electrochemical performance","volume":"2","author":"Li","year":"2013","journal-title":"Nano Energy"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"747","DOI":"10.1016\/j.jpowsour.2014.07.057","article-title":"Lithium-active molybdenum trioxide coated LiNi0.5Co0.2Mn0.3O2 cathode material with enhanced electrochemical properties for lithium-ion batteries","volume":"269","author":"Wu","year":"2014","journal-title":"J. Power Sources"},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"1701788","DOI":"10.1002\/aenm.201701788","article-title":"New insight into Ni-rich layered structure for next-generation Li rechargeable batteries","volume":"8","author":"Lee","year":"2018","journal-title":"Adv. Energy Mater."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"22751","DOI":"10.1021\/jp1088788","article-title":"Electrochemical kinetics of the Li[Li0.23Co0.3Mn0.47]O2 cathode material studied by GITT and EIS","volume":"114","author":"Li","year":"2010","journal-title":"J. Phys. Chem. C"},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"345","DOI":"10.1016\/S1452-3981(23)13343-8","article-title":"Electrochemical impedance spectroscopy (EIS) study of LiNi1\/3Co1\/3Mn1\/3O2 for Li-ion batteries","volume":"7","author":"Wang","year":"2012","journal-title":"Int. J. Electrochem. Sci."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"3961","DOI":"10.1039\/b925711j","article-title":"Functional surface modifications of a high capacity layered Li[Li0.2Mn0.54Ni0.13Co0.13]O2 cathode","volume":"20","author":"Liu","year":"2010","journal-title":"J. Mater. Chem."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"A775","DOI":"10.1149\/1.2966694","article-title":"The effects of AlF3 coating on the performance of Li[Li0.2Mn0.54Ni0.13Co0.13]O2 positive electrode material for lithium-ion battery","volume":"155","author":"Zheng","year":"2008","journal-title":"J. Electrochem. Soc."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"1","DOI":"10.33961\/jecst.2019.00528","article-title":"Modeling and applications of electrochemical impedance spectroscopy (EIS) for lithium-ion batteries","volume":"11","author":"Choi","year":"2020","journal-title":"J. Electrochem. Sci. Technol."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"12220","DOI":"10.1039\/C5TA01849H","article-title":"New insight into structural transformation in Li-rich layered oxide during the initial charging","volume":"3","author":"Shen","year":"2015","journal-title":"J. Mater. Chem. A"},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"A1","DOI":"10.1149\/1.1521754","article-title":"Electrochemical kinetic studies of Li-ion in O2-structured Li2\/3(Ni1\/3Mn2\/3)O2 and Li(2\/3)+x(Ni1\/3Mn2\/3)O2 by EIS and GITT","volume":"150","author":"Shaju","year":"2003","journal-title":"J. Electrochem. Soc."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"A2212","DOI":"10.1149\/2.090311jes","article-title":"Electrochemical kinetics and performance of layered composite cathode material Li[Li0.2Ni0.2Mn0.6]O2","volume":"160","author":"Zheng","year":"2013","journal-title":"J. Electrochem. Soc."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"21922","DOI":"10.1039\/C9RA02331C","article-title":"Impurity removal with highly selective and efficient methods and the recycling of transition metals from spent lithium-ion batteries","volume":"9","author":"Peng","year":"2019","journal-title":"RSC Adv."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"2691","DOI":"10.1016\/S0013-4686(03)00317-7","article-title":"EIS and GITT studies on oxide cathodes, O2-Li(2\/3)+x(Co0.15Mn0.85)O2 (x = 0 and 1\/3)","volume":"48","author":"Shaju","year":"2003","journal-title":"Electrochim. Acta"}],"container-title":["Materials"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1996-1944\/14\/9\/2464\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T05:58:48Z","timestamp":1760162328000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1996-1944\/14\/9\/2464"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,5,10]]},"references-count":34,"journal-issue":{"issue":"9","published-online":{"date-parts":[[2021,5]]}},"alternative-id":["ma14092464"],"URL":"https:\/\/doi.org\/10.3390\/ma14092464","relation":{},"ISSN":["1996-1944"],"issn-type":[{"value":"1996-1944","type":"electronic"}],"subject":[],"published":{"date-parts":[[2021,5,10]]}}}