采用固相法制备LiMn0.98 Mg0.02PO4/C材料,以葡萄糖为碳源,通过不同加入量对材料进行碳包覆改性研究.研究结果表明:制备的材料均为橄榄石型结构,葡萄糖的含量对材料的颗粒形貌没有较大影响,但随着葡萄糖含量的增加,颗粒团聚尺寸减小,分布均匀;当葡萄糖加入量为40％(质量分数)时,制备的材料以0.05 C、0.2C充放电,放电比容量分别为100.1 mA· h/g,79.4 mA·h/g;0.05 C倍率30次循环后,容量保持率为73％,而0.2C倍率下,容量保持率仅为54％.
参考文献
| [1] | The Nam Long Doan;Izumi Taniguchi .Cathode performance of LiMnP0_4/C nanocomposites prepared by a combination of spray pyrolysis and wet ball-milling followed by heat treatment[J].Journal of Power Sources,2011(3):1399-1408. |
| [2] | Kim TR;Kim DH;Ryu HW;Moon JH;Lee JH;Boo S;Kim J .Synthesis of lithium manganese phosphate nanoparticle and its properties[J].The journal of physics and chemistry of solids,2007(5/6):1203-1206. |
| [3] | Deyu Wang;Hilmi Buqa;Michael Crouzet;Gianluca Deghenghi;Thierry Drezen;Ivan Exnar;Nam-Hee Kwon;James H. Miners;Laetitia Poletto;Michael Graetzel .High-performance, nano-structured LiMnPO_4 synthesized via a polyol method[J].Journal of Power Sources,2009(1):624-628. |
| [4] | Natalia N. Bramnik;Helmut Ehrenberg .Precursor-based synthesis and electrochemical performance of LiMnPO_4[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2008(1/2):259-264. |
| [5] | Yao J;Bewlay S;Konstantionv K et al.Characterisation of olivine-type LiMnxFe1-xPO4 cathode materials[J].Journal of Alloys and Compounds,2006,425(1-2):362. |
| [6] | 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. |
| [7] | Zhumabay Bakenov;Izumi Taniguchi .Electrochemical performance of nanocomposite LiMnPO4/C cathode materials for lithium batteries[J].Electrochemistry communications,2010(1):75-78. |
| [8] | Wang Yourong;Yang Yifu;Yang Yanbo et al.Enhanced electrochemical performance of unique morphological LiMnPO4/C cathode material prepared by solvothermal method[J].Solid State communications,2010,150(1-2):81. |
| [9] | Hongmei Ji;Gang Yang;Huan Ni;Soumyajit Roy;Joao Pinto;Xuefan Jiang .General synthesis and morphology control of LiMnPO_4 nanocrystals via microwave-hydrothermal route[J].Electrochimica Acta,2011(9):3093-3100. |
| [10] | Gang Yang;HuanNi;HaidongLiu;PoGao;HongmeiJi;SoumyajitRoy;Joao Pinto;Xuefan Jiang .The doping effect on the crystal structure and electrochemical properties of LiMnxM1_xPO4 (M = Mg, V, Fe, Co, Gd)[J].Journal of Power Sources,2011(10):4747-4755. |
| [11] | 汪燕鸣,王飞,王广健.溶胶-凝胶法制备LiMnPO4/C正极材料及其电化学性能[J].无机材料学报,2013(04):415-419. |
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