磷酸亚铁锂的合成及充放电性能研究Synthesis of LiFePO_4 and Its Electrochemical Performance
甘晖,汪冰冰,连锦明
摘要(Abstract)：
使用固相合成法在不同温度下合成磷酸亚铁锂 .以它为正极活性物质组装成模拟电池测试充放电性能 .使用 XRD和 IR表征样品 .测试结果表明磷酸亚铁锂电池具有平稳的放电平台 ,良好的循环性能 .在0 .0 5 m A/cm2的电流密度下 ,60 0℃合成的样品初始放电容量达到 90 m Ah/g,第 1 0个循环的放电容量达到1 0 0 m Ah/g,80个循环后放电容量仍保持初始容量的 97%以上 ,表明它具有优秀的循环性能 . 5 0 0℃合成的样品中有杂相存在 ,70 0℃合成的样品的晶粒度过大 ,这两个因素都可能使放电容量降低 .在本实验条件下 ,60 0℃是较佳合成温度.
关键词(KeyWords)： 锂离子电池;正极;磷酸亚铁锂
基金项目(Foundation): 福建省教育厅基金资助项目 ( JB0 2 15 4;JA0 2 15 9) ;; 福建省自然科学基金资助项目 ( E0 110 0 2 1)
作者(Author): 甘晖,汪冰冰,连锦明
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