欢迎登录材料期刊网

材料期刊网

高级检索

以柠檬酸为络合剂,聚乙二醇(PEG)为表面活性剂,偏钒酸铵、乙酸锰、磷酸二氢铵、氢氧化锂为原料,采用溶胶-凝胶法合成了xLiMnPO4·yLi3V2(PO4)3锂离子电池复合正极材料.采用X射线衍射(XRD)、扫描电镜(SEM)对其晶体结构和微观形貌进行表征,结果表明在700℃下烧结15 h合成的3LiMnPO4·Li3V2(PO4)3为结晶良好的两相结构,颗粒粒径相对较小且分布均匀.电化学性能研究表明,3LiMnPO4·Li3V2(PO4)3在室温0.2C倍率下首次充放电容量分别为148.2 mAh/g和141.5 mAh/g,循环50次后放电容量为136.7 mAh/g.

参考文献

[1] Yanbing Cao;Jianguo Duan;Guorong Hu;Feng Jiang;Zhongdong Peng;Ke Du;Hongwei Guo.Synthesis and electrochemical performance of nanostructured LiMnPO_4/C composites as lithium-ion battery cathode by a precipitation technique[J].Electrochimica Acta,2013:183-189.
[2] Jing Su;Xing-Long Wu;Jong-Sook Lee .A carbon-coated Li3V2(PO4)3 cathode material with an enhanced high-rate capability and long lifespan for lithium-ion batteries[J].Journal of Materials Chemistry, A. Materials for energy and sustainability,2013(7):2508-2514.
[3] Zhang, X.;Guo, H.;Li, X.;Wang, Z.;Wu, L..Studies of fast-ion conducting Li _3V _2(PO _4) _3 coated LiFePO _4 via sol-gel method[J].Solid state ionics,2012:106-111.
[4] Yujing Bi;Wenchao Yang;Bangcheng Yang .Influence of Li_3V_2(PO_4)_3 complexing on the performance of LiMnPO_4 based materials utilized in lithium ion battery[J].CERAMICS INTERNATIONAL,2014(5):7637-7641.
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:
  • 1
    0%
  • 2
    0%
  • 3
    0%
  • 4
    0%
  • 5
    0%