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However, Si anodes suffer from large volume expansion and poor electrical conductivity. Adding carbon nanotubes (CNTs) as a conductive additive is considered an effective method for addressing the aforementioned issues of Si. CNTs have a unique one-dimensional morphology and excellent conductivity, but strong van der Waals interactions and their long length cause severe aggregation and create entangled bulky structures that impede effective charge transfer within the electrode. Herein, we report shortly-cut CNT (SC\u2013CNT) preparation using iron oxide nanoscrews via carbothermal reduction. The Si nanoparticle (SiNP) anode with an optimal length of the SC\u2013CNT conductive agent showed improved rate and cycling performance with better capacity utilization. This could be attributed to the densely packed SC\u2013CNT network, filling the interstitial space between nanoparticles while maintaining a wide-range conductive structure. The current study presents a promising strategy of CNT length control for the development of conductive additives in batteries.<\/jats:p>","DOI":"10.1021\/acsomega.5c00295","type":"journal-article","created":{"date-parts":[[2025,5,8]],"date-time":"2025-05-08T01:20:07Z","timestamp":1746667207000},"page":"19614-19624","source":"Crossref","is-referenced-by-count":14,"title":["Shortly Cut Carbon Nanotube as a Conductive Additive\nfor High-Performance Silicon Anodes in Lithium-Ion Batteries"],"prefix":"10.1021","volume":"10","author":[{"given":"Youngseul","family":"Cho","sequence":"first","affiliation":[{"name":"Seoul National University , , 145 Gwanggyo-ro, Yeongtong-gu , , ,","place":["Suwon-Si, Gyeonggi-do, Republic of Korea, 16229"]},{"name":"Seoul National University , , Gwanak-ro 1, Gwanak-gu, 39-131 , ,","place":["Seoul, Republic\nof Korea, 08826"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1505-236X","authenticated-orcid":true,"given":"Yuanzhe","family":"Piao","sequence":"additional","affiliation":[{"name":"Seoul National University , , 145 Gwanggyo-ro, Yeongtong-gu , , ,","place":["Suwon-Si, Gyeonggi-do, Republic of Korea, 16229"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"316","published-online":{"date-parts":[[2025,5,8]]},"reference":[{"issue":"5","key":"2026081811230393300_cit1","doi-asserted-by":"publisher","first-page":"252","DOI":"10.1016\/j.mattod.2014.10.040","article-title":"Li-ion battery materials:\nPresent and future","volume":"18","author":"Nitta","year":"2015","journal-title":"Mater. 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Funct. Mater."},{"issue":"1","key":"2026081811230393300_cit6","doi-asserted-by":"publisher","first-page":"57","DOI":"10.1002\/cey2.2","article-title":"The critical\nrole of carbon in marrying silicon and graphite anodes for high-energy\nlithium-ion batteries","volume":"1","author":"Wu","year":"2019","journal-title":"Carbon Energy"},{"key":"2026081811230393300_cit7","doi-asserted-by":"publisher","first-page":"735","DOI":"10.1016\/j.ensm.2020.10.026","article-title":"A review\nof recent developments in Si\/C composite materials for Li-ion batteries","volume":"34","author":"Shi","year":"2021","journal-title":"Energy Storage Mater."},{"issue":"7","key":"2026081811230393300_cit8","doi-asserted-by":"publisher","first-page":"560","DOI":"10.1038\/s41560-019-0398-y","article-title":"High areal capacity battery electrodes\nenabled by segregated nanotube\nnetworks","volume":"4","author":"Park","year":"2019","journal-title":"Nat. Energy."},{"issue":"38","key":"2026081811230393300_cit9","doi-asserted-by":"publisher","first-page":"10805","DOI":"10.1002\/slct.201802259","article-title":"Effect of Morphologically\nDifferent Conductive Agents on the Performance of Silicon Anode in\nLithium-Ion Batteries","volume":"3","author":"Madzvamuse","year":"2018","journal-title":"Chemistryselect"},{"issue":"(2","key":"2026081811230393300_cit10","doi-asserted-by":"publisher","first-page":"2400499","DOI":"10.1002\/aenm.202400499","article-title":"Navigating the Carbon Maze: A Roadmap\nto Effective Carbon Conductive Networks for Lithium-Ion Batteries","volume":"15","author":"Baumgaertner","year":"2025","journal-title":"Adv. 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Compd."},{"issue":"2","key":"2026081811230393300_cit24","doi-asserted-by":"publisher","first-page":"109","DOI":"10.1016\/S0040-6031(00)00540-2","article-title":"Mechanism\nof carbothermal reduction of iron, cobalt, nickel and copper oxides","volume":"360","author":"L\u2019vov","year":"2000","journal-title":"Thermochim. Acta."},{"issue":"1","key":"2026081811230393300_cit25","doi-asserted-by":"publisher","first-page":"7","DOI":"10.1007\/s11249-015-0476-7","article-title":"Preparation and Tribological\nProperties of Polyimide\/Carboxyl-Functionalized\nMulti-walled Carbon Nanotube Nanocomposite Films Under Seawater Lubrication","volume":"58","author":"Nie","year":"2015","journal-title":"Tribol. Lett."},{"issue":"1","key":"2026081811230393300_cit26","doi-asserted-by":"publisher","first-page":"158","DOI":"10.1016\/j.jmat.2020.01.004","article-title":"Polydopamine\/carbon\nnanotube nanocomposite coating for corrosion resistance","volume":"6","author":"Hong","year":"2020","journal-title":"J. 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Sci."},{"issue":"6","key":"2026081811230393300_cit29","doi-asserted-by":"publisher","first-page":"1406","DOI":"10.3390\/molecules23061406","article-title":"Dexamethasone-Loaded, PEGylated,\nVertically Aligned, Multiwalled Carbon Nanotubes for Potential Ischemic\nStroke Intervention","volume":"23","author":"Komane","year":"2018","journal-title":"Molecules"},{"issue":"1","key":"2026081811230393300_cit30","doi-asserted-by":"publisher","first-page":"1300","DOI":"10.1021\/acsnano.5b06675","article-title":"Sulfur Embedded in a Mesoporous Carbon Nanotube Network\nas a Binder-Free Electrode for High-Performance Lithium Sulfur Batteries","volume":"10","author":"Sun","year":"2016","journal-title":"ACS Nano"},{"issue":"3","key":"2026081811230393300_cit31","doi-asserted-by":"publisher","first-page":"3225","DOI":"10.1021\/acssuschemeng.7b03395","article-title":"Multiwalled\nCarbon Nanotubes Anode in Lithium-Ion Battery with LiCoO2, Li\u00ad[Ni1\/3Co1\/3Mn1\/3]\u00adO2, and LiFe1\/4Mn1\/2Co1\/4PO4 Cathodes","volume":"6","author":"Di\nLecce","year":"2018","journal-title":"ACS Sustainable Chem. 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Res.\nTechnol."},{"key":"2026081811230393300_cit34","doi-asserted-by":"publisher","first-page":"1","DOI":"10.1016\/j.carbon.2019.05.062","article-title":"Nanotube length and density dependences\nof electrical and mechanical properties of carbon nanotube fibres\nmade by wet spinning","volume":"152","author":"Tajima","year":"2019","journal-title":"Carbon"},{"issue":"1","key":"2026081811230393300_cit35","doi-asserted-by":"publisher","first-page":"31","DOI":"10.1038\/nnano.2007.411","article-title":"High-performance\nlithium\nbattery anodes using silicon nanowires","volume":"3","author":"Chan","year":"2008","journal-title":"Nat.\nNanotechnol."},{"issue":"1","key":"2026081811230393300_cit36","doi-asserted-by":"publisher","first-page":"960","DOI":"10.1038\/s41598-018-19529-1","article-title":"Waste Windshield-Derived Silicon\/Carbon\nNanocomposites as High-Performance Lithium-Ion Battery Anodes","volume":"8","author":"Choi","year":"2018","journal-title":"Sci. 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