通过固态反应制备了尖晶石型锂锰氧化物LiAl0.2Mn1.8O4-xFx锂离子电池正极材料,采用XRD、EDS等测试对其进行了表征,并测试了样品的电化学性能.结果表明,合成的LiAl0.2Mn1.8O4-xFx(0≤x≤0.3)样品为单一的尖晶石结构;随着F-含量的增加,晶胞参数增大;一定量的Al3+和F-复合改性提高了材料的比容量,增加了尖晶石结构的稳定性,改善了材料的高温循环性能.
参考文献
| [1] | Xia Yongyao;Zhou Yunhong;Yoshio M .[J].Journal of the Electrochemical Society,1997,144(08):2593-2597. |
| [2] | A. Du Pasquier;A. Blyr;P. Courjal;D. Larcher;G. Amatucci;B. Gerand;J-M. Tarascon .Mechanism for limited 55℃ storage performance of Li{sub}1.05Mn{sub}1.95O{sub}4 electrodes[J].Journal of the Electrochemical Society,1999(2):428-436. |
| [3] | Song D.;Uchida T.;Wakihara M.;Ikuta H. .Spinel phases LiAlyMn2-yO4 (y = 0, 1/12, 1/9, 1/6, 1/3) and Li(Al,M)1/6Mn11/6O4 (M = Cr, Co) as the cathode for rechargeable lithium batteries[J].Solid state ionics,1999(1/2):151-156. |
| [4] | Hayashi N;Ikuta H;Wakihara M .[J].Journal of the Electrochemical Society,1999,146(04):1351-1356. |
| [5] | Wang G X;Bradhurst D H;Liu H K .[J].Solid State Ionics,1999,120:95-98. |
| [6] | 李书棠.晶体X射线衍射基础[M].北京:冶金工业出版社,1990 |
| [7] | Chung H T;Myong S T;Cho T H et al.[J].Journal of Power Sources,2001,97-98:454-457. |
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