摘要
目的提高锂离子电池锗基材料的电化学性能。方法采用电泳和离子液体电沉积制备乙炔黑/锗负极材料,用SEM,Raman和充放电循环等手段表征其结构和性能。结果乙炔黑/锗负极材料在0.2C倍率下循环100次,比容量依然可达到600 m Ah/g以上。结论乙炔黑/锗负极材料的电化学性能明显优于单独锗材料和碳材料。
Objective To improve the electrochemical performance of the germanium materials of lithium-ion batteries. Methods Germanium nanoparticles （Ge-NPs） and acetylene black anodes were fabricated through electrodeposition of Ge in the new-generation ionic liquids on the surface of acetylene black which was electrophoretically deposited on a copper current collector. The structure and electrochemical properties were characterized by electron microscopy, Raman spectroscopy and constant current chargedischarge methods. Results The acetylene blaek-Ge nanocomposite exhibited the electrochemical cycling properties of over 600 mAh/g at 0.2C after 100 cycles. Conclusion The electrochemical performance of composite was obviously better than Ge or acetylene black by itself as anode electrode material.
出处
《表面技术》
EI
CAS
CSCD
北大核心
2014年第6期11-15,共5页
Surface Technology
关键词
锂离子电池
负极
乙炔黑/锗
电化学性能
lithium-ion battery
negative electrode
acetylene black/Ge
electrochemical properties
