(中南大學 冶金科學與工程學院，長沙 410083)
摘 要:
關鍵字: LiFePO4/C；鋰離子電池；正極材料；碳摻雜
（School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China）
Abstract:LiFePO4/C was synthesized by solid-state reaction. The materials were characterized by XRD and SEM. The results indicate that the performance of the dextrose as carbon source is better than that of carbon black, and the performance of ferrous oxalate as iron source is better than that of ferrate. The materials synthesized with carbon sources and iron source have a standard structure of olive-type phase, and the materials synthesized with dextrose and ferrous oxalate show the regular appearance and good performance of mixture. The material synthesized with the dextrose and ferrous oxalate shows the best electrochemical performance. The initial discharge capacity of this sample reaches 152.2 mA∙h/g under the rate of 0.1C, and reaches 140.8 mA∙h/g under 3C rate and has a decrease of only 1.2% after 20 cycles.
Key words: LiFePO4/C; Li-ion battery; cathode material; carbon-doped
