Fabrication of a Porous Copper Current Collector Using a Facile Chemical Etching to Alleviate Degradation of a Silicon-Dominant Li-ion Battery Anode

Hongsuk Choi; Subin Kim; Hayong Song; Seokho Suh; 김형진; 엄광섭

doi:10.14773/cst.2021.20.5.249

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자료유형: 학술저널

저자정보: Hongsuk Choi (Gwangju Institute of Science and Technology) Subin Kim (Gwangju Institute of Science and Technology (GIST)) Hayong Song (Gwangju Institute of Science and Technology (GIST)) Seokho Suh (Gwangju Institute of Science and Technology (GIST)) 김형진 (광주과학기술원) 엄광섭 (광주과학기술원)

저널정보: 한국부식방식학회 Corrosion Science and Technology CORROSION SCIENCE AND TECHNOLOGY 제20권 제5호

발행연도: 2021.10

수록면: 249 - 255 (7page)

DOI: 10.14773/cst.2021.20.5.249

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In this work, we proposed a facile method to fabricate the three-dimensional porous copper current collector(3D Cu CC) for a Si-dominant anode in a Li-ion battery (LiB). The 3D Cu CC was prepared by combiningchemical etching and thermal reduction from a planar copper foil. It had a porous layer employingmicro-sized Cu balls with a large surface area. In particular, it had strengthened attachment of Si-dominantactive material on the CC compared to a planar 2D copper foil. Moreover, the increased contact areabetween a Si-dominant active material and the 3D Cu could minimize contact loss of active materials froma CC. As a result of a battery test, Si-dominant active materials on 3D Cu showed higher cyclic performanceand rate-capability than those on a conventional planar copper foil. Specifically, the Si electrodeemploying 3D Cu exhibited an areal capacity of 0.9 mAh cm-2 at the 300th cycles (@ 1.0 mA cm-2), whichwas 5.6 times higher than that on the 2D copper foil (0.16 mAh cm-2).

#Lithium-ion battery #Copper current collector #Silicon-dominant anode #Porous structure #degradation

참고문헌 (20)

참고문헌 신청

Uijin Chang / 2018 / In Situ Self-Formed Nanosheet Mos3/Reduced Graphene Oxide Material Showing Superior Performance as a Lithium-Ion Battery Cathode / ACS Nano 13:1490

Ghassan Zubi / 2018 / The lithium-ion battery: State of the art and future perspectives / Renewable and Sustainable Energy Reviews 89:292~308

KwangSup Eom / 2017 / A stable lithiated silicon–chalcogen battery via synergetic chemical coupling between silicon and selenium / Nature Communications 8(1):13888

Da Deng / 2009 / Green energy storage materials: Nanostructured TiO2 and Sn-based anodes for lithium-ion batteries / Energy & Environmental Science 2(8):818

J.-M. Tarascon / 2011 / Issues and Challenges Facing Rechargeable Lithium Batteries, Materials for sustainable energy: a collection of peer-reviewed research and review articles from Nature Publishing Group

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