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采用固相湿磨并热处理,以酚醛树脂为碳源,合成了锂离子电池正极材料LiMn1-xMgxPO4/C(x=0,0.01、0.04、0.05和0.1).制备的样品具有相似的形貌,掺杂的镁离子半径较小导致了晶格收缩,从而使颗粒细小且分布均匀.充放电测试和交流阻抗表明,由于镁离子掺杂加快了电化学动力学反应过程,而明显提高了材料的电化学性能.600℃煅烧得到的LiMn0.96 Mg0.04PO4/C材料在0.05C倍率下具有144mAh/g的放电容量;高放电倍率下,以恒流-恒压-恒流模式进行充放电测试,LiMn0.96Mg0.04PO4/C复合正极材料显示出良好的循环性能及倍率性能.

参考文献

[1] 常晓燕,王志兴,李新海,匡琼,彭文杰,郭华军,张云河.锂离子电池正极材料LiMnPO4的合成与性能[J].物理化学学报,2004(10):1249-1252.
[2] Yang JS;Xu JJ .Synthesis and characterization of carbon-coated lithium transition metal phosphates LiMPO4 (M = Fe, Mn, Co, Ni) prepared via a nonaqueous sol-gel route[J].Journal of the Electrochemical Society,2006(4):A716-A723.
[3] Yung-Da Cho;George Ting-Kuo Fey;Hsien-Ming Kao .The effect of carbon coating thickness on the capacity of LiFePO_4/C composite cathodes[J].Journal of Power Sources,2009(1):256-262.
[4] Jiali Liu;Rongrong Jiang;Xiaoya Wang;Tao Huang;Aishui Yu .The defect chemistry of LiFePO_4 prepared by hydrothermal method at different pH values[J].Journal of Power Sources,2009(1):38-44.
[5] 王志兴,李向群,常晓燕,郭华军,彭文杰,李新海,陈启元.锂离子电池橄榄石结构正极材料LiMnPO4的合成与性能[J].中国有色金属学报,2008(04):660-665.
[6] Fang HS;Pan ZY;Li LP;Yang Y;Yan GF;Li GS;Wei SQ .The possibility of manganese disorder in LiMnPO4 and its effect on the electrochemical activity[J].Electrochemistry communications,2008(7):1071-1073.
[7] Atsuo Yamada;Mamoru Hosoya;Sai-Cheong Chung;Yoshihiro Kudo;Koichiro Hinokuma;Kuang-Yu Liu;Yoshio Nishi .Olivine-type cathodes Achievements and problems[J].Journal of Power Sources,2003(119/121):232-238.
[8] Thierry Drezen;Nam-Hee Kwon;Paul Bowen;Ivo Teerlinck;Motoshi Isono;Ivan Exnar .Effect of particle size on LiMnPO_4 cathodes[J].Journal of Power Sources,2007(2):949-953.
[9] P. Ramesh Kumar;M. Venkateswarlu;Manjusri Misra .Carbon Coated LiMnPO_4 Nanorods for Lithium Batteries[J].Journal of the Electrochemical Society,2011(3):A227-A230.
[10] 刘爱芳,刘亚菲,胡中华,高歌,雷磊.金属离子掺杂LiMnPO4的电化学性能研究[J].功能材料,2010(07):1144-1146,1149.
[11] Jong-Won Lee;Min-Sik Park;Benayad Anass;Jin-Hwan Park;Meen-Seon Paik;Seok-Gwang Doo .Electrochemical lithiation and delithiation of LiMnPO_4: Effect of cation substitution[J].Electrochimica Acta,2010(13):4162-4169.
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