One-step hydrothermal synthesis of Li2FeSiO4/C composites as lithium-ion battery cathode materials

被引:34
|
作者
Zhang, Meng [1 ]
Chen, Qiuping [2 ]
Xi, Zhixia [2 ]
Hou, Yonggai [1 ]
Chen, Qiuling [2 ]
机构
[1] Henan Univ Technol, Sch Mat Sci & Engn, Zhengzhou 450007, Peoples R China
[2] Politecn Torino, Mat Sci & Chem Engn Dept, I-10129 Turin, Italy
关键词
ELECTROCHEMICAL PERFORMANCE; LONG-LIFE;
D O I
10.1007/s10853-011-6048-9
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Li2FeSiO4/C composites were one-step synthesized under hydrothermal conditions at 200 A degrees C for 72 h using glucose as carbon source. By adjusting the quantity of added glucose, we obtained varied Li2FeSiO4/C composites with different size and morphology. A series of electrochemical tests demonstrate that the Li2FeSiO4/C nanoparticles with diameters about 20 nm have higher discharge capacity, and slower capacity fading in comparison with Li2FeSiO4 and other Li2FeSiO4/C composites. Li2FeSiO4/C nanoparticles deliver a discharge capacity of 136 mAh g(-1) at 0.2 C, and after 100 cycles, the discharge capacity remains 96.1%. Furthermore, Li2FeSiO4/C nanoparticles also exhibit an excellent rate capability with a capacity of about 80 mAh g(-1) at 10 C.
引用
收藏
页码:2328 / 2332
页数:5
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