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文摘
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采用Pechini法合成锂离子蓄电池正极材料LiMn2O4，将生成的聚合物前驱体在空气中点燃，燃烧后的粉料在600-900℃中焙烧6h得到最终产物，研究了uLi/nMn摩尔比例（R）以及合成温度对合成产物结构和化学性能的影响，结果表明在800℃焙烧6h所得试样的初始容量和循环性能最好，当R＝1．00／2时，试样初始容量最高（充电容量138mAh/g)，放电容量126mAh/g).r=1.10/2时，试样的循环性能最好（20次保持94．7％）。 |
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其他语种文摘
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LiMn_2O_4 was synthesized by Pechini method as the cathode material for Li-ion battery. The polymer precursor was pre-ignited in open air, and then calcine the combusted powder at 600-900 ℃ for 6 h, so the final product was obtained. The molar ratio of Li to Mn(R) was researched and the effects of synthesizing temperature on the composition, structure and electrochemical properties of synthesized product were investigated. The results show that the initial capacity and cycling property of the sample calcined at 800 ℃ for 6 h is the best. When R = 1.00/2, the sample has the highest initial capacity (charge capacity is 138 mAh/g, discharge capacity is 126 mAh/g); when R = 1.10/2, the sample has the best cycling properties (capacity retention is 94.7 % after 20 cycles). |
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来源
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电源技术
,2002,26(6):431-433 【核心库】
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关键词
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Pechini预燃烧法
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合成
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锂离子蓄电池
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正极材料
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LiMn2O4
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地址
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中国科学院金属研究所, 金属腐蚀与防护国家重点实验室, 辽宁, 沈阳, 110016
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1002-087X |
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学科
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电工技术 |
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文献收藏号
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CSCD:1122003
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