PAA络合法制备LiMn2O4粉体及其电化学性能Preparation and electrochemical properties of LiMn2O4 powder prepared by PAA complexometry method
孙为,赵胜利,吴朝阳
摘要(Abstract):
采用络合法并结合热处理工艺制备LiMn2O4粉体,考察了热处理温度对LiMn2O4粉体结构、形貌及电化学性能的影响。结果表明:以聚丙烯酸(PAA)、硝酸锂和硝酸锰为原料,在一定温度下合成了稳定的溶胶和凝胶,在不同的煅烧温度下制得了LiMn2O4粉体。随着煅烧温度的升高,粉体颗粒逐渐增大,晶型趋于完整。700℃下煅烧10 h制得的LiMn2O4颗粒大小均匀,晶型完整且没有明显团聚现象。0.1 C倍率首次放电比容量达到118 mA·h/g,经80次循环后仍能达到112 mA·h/g,容量保持率高达95%,表现出良好的循环稳定性。
关键词(KeyWords): LiMn2O4;PAA;结构;电化学性能
基金项目(Foundation): 河南科技大学人才科研基金项目(04015);; 河南省教育厅自然科学计划项目(2006430005)
作者(Author): 孙为,赵胜利,吴朝阳
DOI: 10.13289/j.issn.1009-6264.2014.s1.003
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