摘要
采用化学还原共沉积法制备Ni-Sn和Ni-Sn-Co合金材料。用XRD和SEM分析了结构和形貌,用充放电曲线、循环伏安和交流阻抗谱研究了嵌脱锂行为。Ni-Sn合金为粒状结构,Ni-Sn-Co合金为疏松棉状多相结构。Ni-Sn-Co合金电极的100 mA/g首次充放电比容量分别为542 mAh/g和1 419 mAh/g;第20次循环的可逆比容量为365 mAh/g,库仑效率为94.3%。
Ni-Sn and Ni-Sn-Co alloy materials were synthesized by chemical reduction codeposition method. The structures and morphology were analyzed by XRD and SEM,the lithium insertion-extraction behaviors were studied by charge-discharge curves, cyclic vohammetry and AC impedance plots. Ni-Sn alloy was grainy structure, Ni-Sn-Co alloy was loose cottony and multi-phases structure. The 100 mA/g initial specific charge-discharge capacities of Ni-Sn-Co alloy electrode were 542 mAh/g and 1 419 mAh/g, respectively. The reversible specific capacity at the 20th cycle was 365 mAh/g, the coulombic efficiency was 94.3%.
出处
《电池》
CAS
CSCD
北大核心
2009年第5期251-253,共3页
Battery Bimonthly
基金
宁德师范高等专科学校资助项目(2007201)
