【作者】 华宁； 王辰云； 吐尔迪； 韩英； 康雪雅；

【Author】 Hua Ning~(1,2),Wang Chenyun~(1,2),Turdi~1,Han Ying~1,Kang Xueya~1 (1.Xinjiang Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Urumqi 830011,China; 2.Graduate University of Chinese Academy of Sciences,Beijing 10039,China)

【机构】 中国科学院新疆理化技术研究所； 中国科学院研究生院；

【摘要】 以三价铁源FePO₄·2H₂O,LiOH,草酸为原料,乙二醇为还原剂,葡萄糖为碳源,采用液相还原法结合后续热处理法制备了橄榄石型锂离子正极材料LiFePO₄/C。利用XRD、SEM对其结构和形貌进行分析表明:合成的材料具有良好的晶体结构和表面形貌,颗粒粒径在200～400nm之间;通过电化学性能测试,表明材料具有较好的充放电性能,5C倍率放电容量为103.9mAh/g,并且也有较好的循环性能。该方法制备工艺简单,热处理时间相对常规热处理的方法大为减少,极大的减少了能耗,同时以三价铁为原料降低原料成本,为LiFePO₄产业化应用开拓了新的思路。更多还原

【Abstract】 LiFePO₄/C cathode materials were synthesized by liquid reduction method with heat treatment using FePO₄·2H₂O,LiOH,oxalic acid,ethylene glycol,glucose.The samples were characterized by XRD,SEM and electrochemical performance.The results showed that the LiFePO₄/C has simple pure olive phase and an average particle size of about 200～400nm with a well distribution.Electrochemical test of cycling at a constant current reveals the excellent performance,103.9mAh/g at 5C and a good cycling stability.It is a simple method with much shorter time for heat treatment than conventional,so reduce the energy consumption enormously.The method with ferric iron reduces the cost for industrial applications pioneering a new way of thinking.更多还原