摘要
采用液相沉淀法制备ZnSn（OH）6前驱体。在不同温度下热处理前驱体，得到Zn-Sn复合氧化物。通过差热／热重分析（TG／DTA）、XRD分析前驱体和Zn-Sn复合氧化物的结构，运用恒流充放电研究了Zn-Sn复合氧化物作为锂离子电池负极材料的电化学性能。结果表明：在300℃和500℃下热处理前驱体得到的是非晶态的ZnSnO3，在670℃、720℃和800℃下热处理得到的是晶态的ZnSnO3和尖晶石型Zn2SnO4。若从容量和循环寿命综合考虑，在发生相变的温度范围（670～720℃）内热分解，得到的产物的电化学性能较差。
ZnSn（ OH）6 precursor was prepared by the liquid precipitation method. Zn-Sn composite oxides were synthesized by heat-treated precursor at different temperatures. The structures of precursor and Zn-Sn composite oxides were studied by TG/DTA and XRD. The electrochemical performance of Zn-Sn composite oxides as anode materials for Li-ion battery was studied by the galvanostatic charge-discharge. The results showed that the samples with heat treatment temperature at 300 Zn-Sn and 500 ℃ were amorphous ZnSn03, and the samples with heat treatment temperature at 670 ℃, 720 ℃ and 800 ℃ were crystal ZnSn03 and spinelZn2Sn04. Based on the general analysis for the capacity and cycle life, the samples heat treatment at phase transition temperature range （670～ 720 ℃ ） exhibited worse electrochemical performance.
出处
《电池》
CAS
CSCD
北大核心
2007年第4期263-265,共3页
Battery Bimonthly
基金
湖北省教育厅资助项目(Z200511004)
国家自然科学基金资助(29833090)
