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Choi, Kyoung Jin
Energy Conversion Materials (EcoMAT) Lab
Research Interests
  • Solar cells, thermoelectrics, piezoelectric

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Graphene as an Interfacial Layer for Improving Cycling Performance of Si Nanowires in Lithium-Ion Batteries

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Title
Graphene as an Interfacial Layer for Improving Cycling Performance of Si Nanowires in Lithium-Ion Batteries
Author
Xia, FanKwon, SunsangLee, Won WooLiu, ZhimingKim, SuhanSong, TaeseupChoi, Kyoung JinPaik, UngyuPark, Won Il
Issue Date
2015-10
Publisher
AMER CHEMICAL SOC
Citation
NANO LETTERS, v.15, no.10, pp.6658 - 6664
Abstract
Managing interfacial instability is crucial for enhancing cyclability in lithium-ion batteries (LIBs), yet little attention has been devoted to this issue until recently. Here, we introduce graphene as an interfacial layer between the current collector and the anode composed of Si nanowires (SiNWs) to improve the cycling capability of LIBs. The atomically thin graphene lessened the stress accumulated by volumetric mismatch and inhibited interfacial reactions that would accelerate the fatigue of Si anodes. By simply incorporating graphene at the interface, we demonstrated significantly enhanced cycling stability for SiNW-based LIB anodes, with retentions of more than 2400 mAh/g specific charge capacity over 200 cycles, 2.7 times that of SiNWs on a bare current collector.
URI
https://scholarworks.unist.ac.kr/handle/201301/17690
URL
http://pubs.acs.org/doi/10.1021/acs.nanolett.5b02482
DOI
10.1021/acs.nanolett.5b02482
ISSN
1530-6984
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