CuO的可控合成及其作为锂离子电池负极材料的性能  

Controllable Synthesis of CuO and Its Electrochemical Performances as Anode in Li-ion Batteries

作　　者：张大伟[1,2] 陈静娟[1] 杨永清[1] 杨晨戈[1] 王忠兵[1] 陈春华[2] 何孝军[3] 

机构地区：[1]合肥工业大学化工学院,安徽合肥230009 [2]中国科学技术大学材料科学与工程系,安徽合肥230026 [3]安徽工业大学化学与化工学院,安徽马鞍山243002

出　　处：《安徽工业大学学报（自然科学版）》2010年第3期284-288,共5页Journal of Anhui University of Technology（Natural Science）

基　　金：国家自然科学基金(20703013);中国博士后基金(20070410218);合肥工业大学2009-2010年学生创新基金资助项目

摘　　要：通过溶液沉淀加水热反应的方法合成了不同形貌的氧化铜。通过循环伏安法、充放电法等研究氧化铜作为锂离子电池负极材料的电化学性能。结果表明:不同形貌的氧化铜电化学性能差异很大,首次嵌锂容量均在700mA·h/g以上,而结晶性能较好、形貌较规则的氧化铜粉末呈现出较好的电化学循环稳定性,100次循环后容量仍保持400 mA·h/g。对氧化铜负极材料的反应机理、首次容量高于理论容量及不可逆容量的原因进行了分析。CuO particles with different morphologies were synthesized by a two-step method, which was ftrstly precipitated then by hydrothermal reaction. The electrochemical performance of CuO particles as anode in Li-ion batteries was studied by cyclic voltammetry （CV）, and charge/discharge technique. The results show that there is much difference for the CuO electrode with different morphologies, the initial Li intercalation capacity are all above 700 mAh/g, whereas the CuO electrode with better crystallinity and more uniform morphology presents a preferable electrochemical performance, the lithium storage capacity remains at 400 mAh/g even after 100 cycles. The reaetion mechanism of CuO electrode, the reasons for initial capacity higher than theoretical capacity, and the irreversible capacity are analysized.

关 键 词：氧化铜 沉淀加水热 反应机理 锂离子电池 不可逆容量 

分 类 号：O635[理学—高分子化学]