以乙二醇为溶剂,采用溶胶-凝胶法合成了LiFePO4/C.采用X射线衍射、扫描电镜、透射电镜和电化学阻抗谱等分析测试方法,研究了600～750 ℃范围内合成的LiFePO4/C的微观结构特征、在不同放电倍率下的循环稳定性和放电容量等电化学性能.研究结果表明,合成温度对LiFePO4的结晶状况及LiFePO4/C电极的电化学性能有着显著的影响.700℃烧结的产物结晶完整,颗粒细小(～150nm)均匀,电化学性能有了显著的提高,0.5C的放电容量达到150mAh/g,1C的放电容量仍有141mAh/g,经200个循环,放电容量基本保持不变.
参考文献
| [1] | Padhi A K,Nanjundaswamy K S,Goodenough J B.Journal of Electrochemical Society,1997,144:1188. |
| [2] | Padhi A K,Nanjundaswamy K S,Masquelier C,et al.Journal of Electrochemical Society,1997,144:1609. |
| [3] | Padhi A K,Manivannan V,Goodenough J B.Journal of Electrochemical Society,1998,145:1518. |
| [4] | Yamada A,Chung S C.Journal of Electrochemical Society,2001,148:A224-A229. |
| [5] | Shiraishi Keisuke,Dokko Kaoru,Kanmura Kiyoshi,et al.Journal of Power Source,2005,146:555-558. |
| [6] | Dominko R,Goupil J M,Bele M,et al.Journal of Electrochemical Society,2005,152 (5):A858-A863. |
| [7] | Hui X,Zhen T Z.Electrochimica Acta,2006,51:2063-2067. |
| [8] | 文衍宣,郑绵平,童张法,等(WEN Yan-Xuan,et al).无机材料学报(Journal of Inorganic Materials),2006,21(1):115-120. |
| [9] | 杨书廷,李廷举(YANG Shu-Ting,et al).无机材料学报(Journal of Inorganic Materials),2006,21(4):880-884. |
| [10] | Herle P S,Ellis B,Coombs N,et al.Nature Materials,2004,3:147-152. |
| [11] | Goupil J M,Bele M.Journal of Electrochemical Society,2005,152 (5):A858-A863. |
| [12] | Dominko R,Bele M,Gaberscek M,et al.Journal of Electrochemical Society,2005,152 (3):A607-A610. |
| [13] | Liao X Z,.Ma Z F,He Y S,et al.Journal of Electrochemical Society,2005,152 (10):A1969-A1973. |
| [14] | Wu M S,Chiang P J,Lin J C.Journal of Electrochemical Society,2005,152 (1):A47-A52. |
| [15] | Li X L,Kang F Y,Shen W C.Carbon,2006,44:1298-1352. |
| [16] | Hong J,Wang C S,Kasavajjula U.Journal of Power Sources,2006,doi:10.1016/j.jpowsour.2006.08.004. |
| [17] | 吴宇平,戴晓兵,马军旗,等.锂离子电池-应用与实践,第1版.北京:化学工业出版社,2004.14-17. |
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%