关键词: 锂离子电池, 硅负极材料, 纳米结构, 循环寿命, 固态电解质层

Abstract:

Silicon(Si), with the highest specific capacity currently known, is a promising anode material for Li-ion battery. However, in the charging and discharging process, with Li atoms inserting into and breaking out of the Si crystal lattices, the Si anode undergoes enormous volume expansion and contraction, ending in pulverization. The fact that the specific capacity of bulk Si anodes drop quickly is a challenging problem. In this review, we summarize recent progresses in Si anode. We concern about the nanostructure of silicon, cooperation of silicon with other additives and macrostructure design of anodes. We discuss strengths and shortcomings of different methods, considering both electrochemical performance and mass production feasibility.

Key words: lithium-ion battery, silicon anode, nanostructure, cycle life, solid electrolyte interface