关键词: 硅, 纳米线, 负极材料, 锂离子电池, 电化学性能, 涂膜法, 直接生长成膜法

Abstract: The SiNWs electrodes were fabricated by coating and direct growth methods,respectively.The structure,morphology and electrochemical performance of such materials were characterized by XRD,SEM and charge-discharge tests.The results show that the electrodes prepared by direct growth method had higher capacity,better battery life and also displayed and excellent cyclability at higher currents.During the process of lithiation,the initial crystalline Si transformed to amorphous LixSi,and the average diameter of the SiNWs increased.Despite the large volume changed,the SiNWs remained intact and did not break into smaller particles.

Key words: Silicon, nanowires, anode materials, electroperformance, lithium-ion batteries, coating method, direct growth method