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SCI Article

Multiscale Engineered Si/SiOx Nanocomposite Electrodes for Lithium-Ion Batteries Using Layer-by-Laye
성명 김한수()
소속 공과대학 에너지공학과
캠퍼스
우수선정주 2018년 06월 3째주
Author Kim, Ayoung (Dept Energy Engn); Chung, Dong Jae (Dept Energy Engn); Park, Eunjun (Dept Energy Engn); 김한수 (Dept Energy Engn);
Corresponding Author Info Grant, PS (reprint author), Univ Oxford, Dept Mat, Parks Rd, Oxford OX1 3PH, England.; Kim, H (reprint author), Hanyang Univ, Dept Energy Engn, 222 Wangsimni Ro, Seoul 04763, South Korea.
E-mail 이메일 아이콘khansu@hanyang.ac.kr
Document Type Article
Source ACS APPLIED MATERIALS & INTERFACES Volume:10 Issue:18 Pages:15624-15633 Published:2018
Times Cited 0
External Information http://dx.doi.org/10.1021/acsami.8b00370
Abstract Si-based high-capacity materials have gained much attention as an alternative to graphite in Li-ion battery anodes. Although Si additions to graphite anodes are now commercialized, the fraction of Si that can be usefully exploited is restricted due to its poor cyclability arising from the large volume changes during charge/discharge. Si/SiOx nanocomposites have also shown promising behavior, such as better capacity retention than Si alone because the amorphous SiOx helps to accommodate the volume changes of the Si. Here, we demonstrate a new electrode architecture for further advancing the performance of Si/SiOx nanocomposite anodes using a scalable layer-by-layer atomization spray deposition technique. We show that particulate C interlayers between the current collector and the Si/SiOx layer and between the separator and the Si/SiOx layer improved electrical contact and reduced irreversible pulverization of the Si/SiOx significantly. Overall, the multiscale approach based on microstructuring at the electrode level combined with nanoengineering at the material level improved the capacity, rate capability, and cycling stability compared to that of an anode comprising a random mixture of the same materials.
Web of Science Categories Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
Funding U.K. Engineering and Physical Research Council [EP/M009521/1]; National Research Foundation of Korea (NRF)-Korean government (MSIT) [NRF-2017R1A2B2012847]
Language English
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