期刊
CHEMELECTROCHEM
卷 2, 期 11, 页码 1645-1651出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/celc.201500254
关键词
elastic electrodes; electrode engineering; Si nanostructures; silicon anodes; volume change accommodation
资金
- IT RAMP
- D program of the Ministry of Trade, Industry AMP
- Energy/Korea Evaluation Institute of Industrial Technology (MOTIE/KEIT) (Development of Li-rich Cathode and Carbon-free Anode Materials for High Capacity/High Rate Lithium Secondary Batteries) [10046309]
- Korea Evaluation Institute of Industrial Technology (KEIT) [10046306] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Si has been considered as a promising alternative anode for next-generation Li-ion batteries (LIBs) because of its high theoretical energy density, relatively low working potential, and abundance in nature. However, Si anodes exhibit rapid capacity decay and an increase in the internal resistance, which are caused by the large volume changes upon Li insertion and extraction. This unfortunately limits their practical applications. Therefore, managing the total volume change remains a critical challenge for effectively alleviating the mechanical fractures and instability of solid-electrolyte-interphase products. In this regard, we review the recent progress in volume-change-accommodating Si electrodes and investigate their ingenious structures with significant improvements in the battery performance, including size-controlled materials, patterned thin films, porous structures, shape-preserving shell designs, and graphene composites. These representative approaches potentially overcome the large morphologic changes in the volume of Si anodes by securing the strain relaxation and structural integrity in the entire electrode. Finally, we propose perspectives and future challenges to realize the practical application of Si anodes in LIB systems.
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