摘要
用循环伏安、扫描电子显微镜和循环检测装置研究了表面状况不同的铜箔集流体对锂离子电池性能的影响.结果表明,电解液在毛面铜箔表面发生还原反应的程度比在光面铜箔表面显著,其阳极溶解电位比光面铜箔约低0.8 V,且溶解需要的能量较少,相对耐腐蚀性较差.光面铜箔集流体锂离子电池的容量循环衰减要比毛面铜箔小,且随着循环的进行,后者的容量衰减趋势明显加剧.
The effects of copper foils with different surface profile as current collector on performance of Li-ion battery are investigated by cyclic voltammetry measurements, scanning electronic microscopy observations as well as measurement of of cyclic performance of batteries. The results indicate that the reducing reaction of electrolyte on the foil with rough surface is much visible than on that with shiny surface, the dissolution potential of matte copper foil is 0. 8 V lower than that of the shiny copper foil which implies that the reduction reaction on the rough foil needs much less energy. In other wards, the rough foil is less corrosion resistant. The capacity decrease of battery Li-ion batteries is much smaller than that with with shiny copper foil as cathode current collector for matte copper foil, and the capacity decrease for the latter becomes much obviously speedy by cycling.
出处
《腐蚀科学与防护技术》
CAS
CSCD
北大核心
2007年第4期265-268,共4页
Corrosion Science and Protection Technology
关键词
锂离子电池
毛面铜箔
光面铜箔
Li-ion battery
matte copper foil
shiny copper foil
