盲孔铜集流体制备及其对硅基阳极循环性能的改善(英文)  

Preparation of current collector with blind holes and enhanced cycle performance of silicon-based anode

作　　者：汤兴贤[1] 刘崴 叶邦彦[1] 汤勇[1] 

机构地区：[1]华南理工大学机械与汽车工程学院表面功能结构先进制造广东普通高校重点实验室,广州510640 [2]广汽丰田汽车有限公司质量管理部,广州511455

出　　处：《中国有色金属学会会刊：英文版》2013年第6期1723-1727,共5页Transactions of Nonferrous Metals Society of China

基　　金：Project(50930005)supported by the National Natural Science Foundation of China;Project(20100172110001)supported by the Doctoral Foundation of Ministry of Education of China;Project(10451064101005146)supported by the Natural Science Foundation of Guangdong Province,China

摘　　要：为提高硅基阳极的电化学性能,采用激光加工制备表面具有盲孔的铜集流体。将具有盲孔的铜集流体及表面光滑的铜集流体制成电极片,并组装成纽扣电池进行充放电循环测试。与表面光滑的铜集流体相比,多孔铜集流体显示出性能优势。电压—容量曲线表明,带有盲孔的集流体可以保持电极结构,进而保证较小的界面接触电阻。结果表明:多孔铜集流体可以提高硅基阳极的循环性能和库伦效率。To enhance the electrochemical performance of silicon-based anode, a Cu current collector with blind holes (CCBH) was fabricated by laser machining. The electrodes were composed of CCBH and smooth current collector, and cells assembled with electrodes were tested by charge-discharge cycling. In comparison with smooth current collector, the CCBH exhibits performance superiority. The curves of voltage-capacity indicate that CCBH can keep electrode structure to offer low contact resistance. The results show that CCBH can improve the cycle performance and coulomb efficiency of silicon-based anode.

关 键 词：锂离子电池 集流体 硅 循环性能 

分 类 号：TM912[电气工程—电力电子与电力传动]