摘要
以无机原料为前体,采用溶胶 凝胶法制备了SnO2干凝胶,经不同温度下的热处理得到不同晶粒尺寸的纳米SnO2超细粉。用热重 差热分析(TG DTA)、红外光谱(IR)、X射线衍射分析(XRD)、透射电镜(TEM)等对SnO2粉末进行了表征,结果表明,该工艺制得的SnO2超细粉具有金红石结构,粒径分布均匀,经550℃热处理所得SnO2粉末平均粒径为10nm左右。将该法制得的纳米SnO2粉末作为锂离子蓄电池负极材料,可逆容量高(达600mAh·g-1),嵌脱锂电压低(0.2～0.5V),循环性能良好,说明纳米SnO2是一种很有潜力的锂离子蓄电池负极材料。
Nanometer-sized SnO_2 particles were prepared by sol-gel process using inorganic salt as a precursor material. Its crystallization was investigated by means of thermo-gravimetric analysis and differential thermal analysis (TG-DTA), Infrared (IR) transmission spectra, X-ray diffraction and TEM. Results indicate that well-crystallized nano-sized SnO_2 with size about 10 nm can be obtained at annealing temperature 550 ℃. The electrochemical properties of nano-sized SnO_2 powder as anode material for lithium ion batteries were studied. The results show that nano-sized SnO_2 would be an potential anode material for lithium ion batteries with high reversible capacity (more than 600 mAh·g-1) and low voltage plateau (0.2～0.5 V) for Li+ intercalation and deintercalation.
出处
《电源技术》
CAS
CSCD
北大核心
2003年第5期422-426,共5页
Chinese Journal of Power Sources
