Engineering of carbon and other protective coating layers for stabilizing silicon anode materials

被引:156
作者
Wang, Fenglin [1 ]
Chen, Gen [1 ]
Zhang, Ning [1 ]
Liu, Xiaohe [1 ]
Ma, Renzhi [1 ]
机构
[1] Cent South Univ, Sch Mat Sci & Engn, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China
基金
中国国家自然科学基金; 日本学术振兴会;
关键词
silicon; carbon; protective layer; lithium storage; LITHIUM-ION BATTERY; ENCAPSULATED SI NANOPARTICLES; SOLID-STATE AMORPHIZATION; HIGH-CAPACITY; AMORPHOUS-SILICON; COMPOSITE ANODE; HIGH-ENERGY; NEGATIVE ELECTRODE; CONDUCTIVE POLYMER; C COMPOSITE;
D O I
10.1002/cey2.24
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Silicon (Si) has been attracting extensive attention for rechargeable lithium (Li)-ion batteries due to its high theoretical capacity and low potential vs Li/Li+. However, it remains challenging and problematic to stabilize the Si materials during electrochemical cycling because of the huge volume expansion, which results in losing electric contact and pulverization of Si particles. Consequently, the Si anode materials generally suffer from poor cycling, poor rate performance, and low coulomb efficiency, preventing them from practical applications. Up-to-date, there are numerous reports on the engineering of Si anode materials at microscale and nanoscale with significantly improved electrochemical performances. In this review, we will concentrate on various precisely designed protective layers for silicon-based materials, including carbon layers, inorganic layers, and conductive polymer protective layer. First, we briefly introduced the alloying and failure mechanism of Si as anode materials upon electrochemical reactions. Following that, representative cases have been introduced and summarized to illustrate the purpose and advancement of protective coating layers, for instance, to alleviate pulverization and improve conductivity caused by volume expansion of Si particles during charge/discharge process, and maintain the surface stability of Si particles to form a stable solid-electrolyte interphase layer. At last, possible strategies on the protective coating layer for stabilizing silicon anode materials that can be applied in the future have been indicated.
引用
收藏
页码:219 / 245
页数:27
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