A novel Li2FeSiO4/C composite: Synthesis, characterization and high storage capacity

被引：147

作者：

Lv, Dongping ^{[1
]}

Wen, Wen ^{[2
]}

Huang, Xingkang ^{[1
]}

Bai, Jingyu ^{[1
]}

Mi, Jinxiao ^{[3
]}

Wu, Shunqing ^{[4
,5
]}

Yang, Yong ^{[1
]}

机构：

[1] Xiamen Univ, Dept Chem, Coll Chem & Chem Engn, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China

[2] Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China

[3] Xiamen Univ, Coll Mat, Dept Mat Sci & Engn, Xiamen 361005, Peoples R China

[4] Xiamen Univ, Inst Theoret Phys & Astrophys, Xiamen 361005, Peoples R China

[5] Xiamen Univ, Dept Phys, Xiamen 361005, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2011年 / 21卷 / 26期

基金：

中国国家自然科学基金;

关键词：

LITHIUM-ION BATTERIES; CATHODE MATERIAL; ELECTROCHEMICAL PERFORMANCE; ELECTRODE MATERIAL; LI; LI2MNSIO4; LIFEPO4; LI2MNXFE1-XSIO4; MECHANISM; LI2COSIO4;

D O I：

10.1039/c0jm03928d

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A Li2FeSiO4/C composite material has been prepared via a solution-polymerization approach. The composite is characterized by X-ray diffraction (XRD), X-ray absorption near edge structure (XANES), scanning electron microscope (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), and superconducting quantum interference device (SQUID). The electrochemical performance of the Li2FeSiO4 is greatly enhanced and the initial discharge capacity is similar to 220 mA h g(-1), when it is cycled between 1.5-4.8 V. This indicates that more than one lithium ion can be extracted out of the Li2FeSiO4 lattice. At high current densities, the Li2FeSiO4/C also exhibits excellent rate capability and cycling stability. This indicates that it is a very promising cathode material for next generation lithium-ion batteries.

引用

页码：9506 / 9512

页数：7

共 42 条

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