锂离子电池负极Sn/Ni_3Sn_4合金的制备和表征  

Synthesis and Characteristics of Sn/Ni_3Sn_4 Alloy as Anode Material for Lithium Ion Batteries

作　　者：袁庆丰[1] 卜冬蕾[1] 王文璐[1] 陈春华[1] 

机构地区：[1]中国科学技术大学材料科学与工程系,安徽合肥230026

出　　处：《过程工程学报》2006年第6期983-986,共4页The Chinese Journal of Process Engineering

基　　金：国家自然科学基金面上基金资助项目(编号:50372064;20471057)

摘　　要：采用湿化学还原法及高能球磨处理工艺制备了Sn/Ni3Sn4双相合金体系,用XRD和SEM对其晶体结构和颗粒形貌进行了分析,以循环伏安法和恒电流循环对其电化学性能进行了表征.结果表明,Sn/Ni3Sn4合金相由1～4μm的团聚体组成.该合金材料表现出96.4%的首次库仑效率和较高的比容量.截止电压对其循环性能有很大的影响,0.3～1.0V的电压区间显示出相对优良的循环稳定性.A dual-phase Sn/Ni3Sn4 alloy was synthesized by a method of wet chemical reduction followed by ball-milling. Its crystalline structure and powder morphology were characterized by XRD and SEM analyses. Cyclic voltammetry and galvanostic cell cycling were also used to characterize its electrochemical properties. The results showed that the Sn/Ni3Sr4 powder was mainly composed of 1-4μm agglomerates and had 96.4% columbic efficiency and high specific charge-discharge capacity in the first cycle. The electrochemical cycling ability was very sensitive to the cutoff voltages of the charge-discharge process. Within the optimized voltage window of 0.3-1.0 V, the alloy showed a rather stable cycling performance.

关 键 词：锂离子电池 负极 Sn-Ni合金 截止电压 

分 类 号：TM911[电气工程—电力电子与电力传动]