采用两步烧结法处理原位合成的碳包覆的LiFePO4/C复合正极材料,采用XRD、SEM对材料的结构及表面形貌进行了表征；通过CV、EIS及充放电测试仪进行电化学性能测试.结果表明,两步烧结法制备的材料具有良好的倍率性能及循环性能.0.2C时的首次放电比容量为142.5 mAh/g,循环30次后,放电比容量仍达到126.9 mAh/g;0.5 C时的首次放电比容量为122.9 mAh/g;1 C时的首次放电比容量为106.4 mAh/g;2 C时的首次充放电为81.3 mAh/g.
参考文献
| [1] | Padhi AK.;Goodenough JB.;Nanjundaswamy KS. .PHOSPHO-OLIVINES AS POSITIVE-ELECTRODE MATERIALS FOR RECHARGEABLE LITHIUM BATTERIES[J].Journal of the Electrochemical Society,1997(4):1188-1194. |
| [2] | Jin Chong;Shidi Xun;Honghe Zheng;Xiangyun Song;Gao LiuPaul Ridgway;Ji Qiang Wang;Vincent S. Battaglia .A comparative study of polyacrylic acid and poly(vinylidene difluoride) binders for spherical natural graphite/LiFePO_4 electrodes and cells[J].Journal of Power Sources,2011(18):7707-7714. |
| [3] | Hu, YS;Guo, YG;Dominko, R;Gaberscek, M;Jamnik, J;Maier, J .Improved electrode performance of porous LiFePO4 using RuO2 as an oxidic nanoscale interconnect[J].Advanced Materials,2007(15):1963-1966. |
| [4] | Sun, C.;Rajasekhara, S.;Goodenough, J.B.;Zhou, F. .Monodisperse porous LiFePO4 microspheres for a high power Li-ion battery cathode[J].Journal of the American Chemical Society,2011(7):2132-2135. |
| [5] | Qiuming Wang;Dianlong Wang;Bo Wang .Modified carbothermal synthesis and electrochemical performance of LiFePO4/C composite as cathode materials for lithium-ion batteries[J].Ionics,2013(2):245-252. |
| [6] | Yang, K.;Deng, Z.;Suo, J. .Effects of carbon sources and carbon contents on the electrochemical properties of LiFePO _4/C cathode material[J].Journal of solid state electrochemistry,2012(8):2805-2813. |
| [7] | Fang, X.;Li, J.;Huang, K.;Liu, S.;Huang, C.;Zhuang, S.;Zhang, J. .Synthesis and electrochemical properties of K-doped LiFePO _4/C composite as cathode material for lithium-ion batteries[J].Journal of solid state electrochemistry,2012(2):767-773. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%