水性粘结剂对纳米SnO2电化学性能的影响  

Effects of aqueous adhesive on the electrochemical performance of nano-sized SnO_2

作　　者：杨峰[1] 陈立宝[1] 李雅琳[2] 王太宏[1] 

机构地区：[1]湖南大学微纳技术研究中心,湖南长沙410082 [2]湖南大学电池与高分子材料研究所,湖南长沙410082

出　　处：《电池》2008年第2期99-102,共4页Battery Bimonthly

摘　　要：采用溶胶一凝胶法制备了纳米SnO2粉末，研究了水性粘结剂对SnO2电化学性能的影响。使用6％的水性粘结剂LA133，SnO2的首次可逆比容量为621mAh／g，约比使用PVDF时大2倍。改变LA133的含量、电流密度和电压范围，能提高SnO2的循环性能。当LA133的含量为10％时，15次循环后，SnO2的平均容量保持率为67．7％；降低上限截止电压有助于提高SnO2的循环性能，当电压范围为0～0．8V时，20次循环后的容量保持率高达99．7％。Nano-sized SnO2 powder was synthesized by the sol-gel method. The effect of aqueous adhesive LA133 on the electrochemical performance of SnO2 was investigated. The initial specific reversible capacity of SnO2 was 621 mAh/g when using 6% aqueous adhesive, which was about twice larger than that with PVDF. The cycle performance of SnO2 was improved by changing the content of LA133, current density and voltage range. When the content of LA133 was 10%, the average capacity retention ratio of SnO2 was 67.7% after 15 cycles. Decreasing the upper cutoff voltage was helpful to improve the cycle performance of SnO2. When the voltage range was 0 ～ 0.8 V, the capacity retention ratio was 99.7% after 20 cycles.

关 键 词：SNO2 锂离子电池 水性粘结剂 电化学性能 

分 类 号：TM912[电气工程—电力电子与电力传动]