以碳酸锂、碳酸锰和磷酸二氢铵为原料,以蔗糖为碳源,采用固相法制备了LiMnPO4/C复合正极材料.利用正交试验考察了焙烧温度、焙烧时间、球磨时间、锂锰摩尔比和蔗糖用量对材料首次放电比容量的影响,得到了最佳工艺条件.通过XRD、SEM、同步热分析仪和充放电测试仪等测试了材料的结构和电化学性能.所得材料在室温下电流密度为0.1C、0.5C和1C时首次放电比容量分别为130.5 mAh/g、125.8 mAh/g和117.1 mAh/g,经过50次循环性能测试后容量分别为113.2 mAh/g、98.1 mAh/g和85.4 mAh/g;在电流密度为0.1C且温度为60℃时,其首次放电比容量为156.4 mAh/g,测试结果表明循环性能较好.
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