摘要
用化学还原-共沉淀法合成了锂离子电池纳米锌锡锑三元合金负极材料ZnSnSb2。通过XRD、TEM和电化学测试对材料进行了表征。所制备的材料粒径大小分布在5-15nm之间。在充放电电压为1.5V到0V范围内,初始可逆充电容量为708mAh/g,经过20周的循环后,充电容量保持为82.1%。充放电电压范围为0.9V到0V时,初始可逆充电容量为329mAh/g,经过20次充放电循环后,可逆充电容量仍然保持在95.7%。由于材料中非活性物质Li3Sb的作用以及材料所具有的纳米结构,使其循环性能大大提高。
Nanosized ZnSnSb_2 powders were synthesized as an anode material for lithium ion batteries by reductive co-precipitation method.The product was characterized by X-ray diffractometry（XRD）,transmission electron microscopy（TEM）and electrochemical measurements.The sizes of the particles are in the range of 5 to 15nm.The first-cycle reversible capacity of the prepared ZnSnSb_2 is 708mAh/g and the rest charge capacity after 20 cycles is 82.1% when the cell is discharged and charged between 1.5V and 0V.The first-cycle reversible capacity is 329mAh/g and the rest charge capacity after 20 cycles is 95.7% when the cell is discharged and charged between 0.9V and 0V.Because the roles of the inactive substance Li_3Sb and nanosized particles,the sample shows excellent cycle performance.
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2010年第3期331-334,共4页
Journal of Materials Science and Engineering
基金
浙江省教育厅科研计划资助项目(Y200907595)
关键词
锌锡锑合金
锂离子电池
贮锂材料
Zinc-Tin-Antimony alloy
Lithium ion batteries
Lithium storage materials
