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络合-沉淀法合成LiMnPO_4/C及其电化学性质研究

Coordination-precipitation synthesis and electrochemical properties of LiMnPO_4/C
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摘要 采用新型的络合-沉淀法制备了锂离子电池正极复合材料LiMnPO4/C.利用X射线衍射(XRD)研究了所制备材料的物象结构,用Land-2001电池测试系统研究了材料的充放电性能和循环稳定性.结果表明,煅烧温度对材料的电化学性能影响较大,其中700℃煅烧所得LiMnPO4/C样品的充放电比容量和循环性能最佳,最大放电比容量达到72.5mAh·g-1,1C(1C=170mA·g-1)倍率下循环15次后放电比容量保持率约98.8%,2C倍率下循环10次后放电比容量保持率约97.1%. The LiMnPO4/C cathode material is synthesized using a coordination-precipitation method . The results show that the structures of as-prepared samples are characterized by X-ray diffraction analysis （XRD） . The charge-discharge characteristics and cycle stability are also studies . The results show that the electrochemical performance is dependent on the synthesis temperature . T he sample synthesized under calcining at 700 ℃ shows best specific capacities of 72.5 mAh·g -1 ,as well as rate capability with 98.8%capacity retention under 1C（1 C=170 mA·g-1 ） after 15 cycles , and 97.1% under 2 C after 10 cycles .
作者 张海军
机构地区 兰州大学化学化工学院
出处 《西北师范大学学报（自然科学版）》 CAS 北大核心 2013年第6期59-62,共4页 Journal of Northwest Normal University(Natural Science)
基金 中央高校基本科研业务费专项资金小额探索项目(lzujbky-2010-161)
关键词 络合-沉淀法 锂离子电池正极材料 LIMNPO4 C 比容量 充放电性能 coordination-precipitation method lithium ion battery cathode material LiM nPO4/C specific capacity charge and discharge property
分类号 O614.111 [理学—无机化学] O613.62 [理学—无机化学]
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参考文献11

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二级参考文献42

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共引文献39

西北师范大学学报（自然科学版）
2013年 第6期

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