Solid-state synthesis of uniform Li2MnSiO4/C/graphene composites and their performance in lithium-ion batteries

被引：40

作者：

Gong, Huaxu ^{[1
]}

Zhu, Yongchun ^{[1
]}

Wang, Linlin ^{[1
]}

Wei, Denghu ^{[1
]}

Liang, Jianwen ^{[1
]}

Qian, Yitai ^{[1
,2
]}

机构：

[1] Univ Sci & Technol China, Dept Chem, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China

[2] Shandong Univ, Sch Chem & Chem Engn, Jinan 250100, Peoples R China

来源：

JOURNAL OF POWER SOURCES | 2014年 / 246卷

关键词：

Composites; Nanospheres; Carbon network; Electrochemical properties; ELECTROCHEMICAL PERFORMANCE; HYDROTHERMAL SYNTHESIS; MANGANESE SILICATE; CATHODE MATERIAL; LI2MSIO4; M; LI2MNSIO4; CARBON; MN; FE; NANOCOMPOSITE;

D O I：

10.1016/j.jpowsour.2013.07.079

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：

Uniform nanospherical Li2MnSiO4/C/graphene composites have been obtained by polyethylene glycol-600 (PEG-600) assisted solid-state reaction using spherical SiO2 as precursor, and heat treatment with the mixed carbon sources (glucose, cellulose acetate and graphene oxide). The transmission electron microscope (TEM) images show that Li2MnSiO4 nanospheres with size of 50 nm are embedded in the three-dimensional (3D) nest-like carbon network. Electrochemical measurements reveal that the composites exhibit first discharge capacity of 215.3 mAh g(-1) under 0.05 C, together with a stable discharge capacity of 175 mAh g(-1) after 40 cycles. The 3D carbon network and the carbon layer (amorphous carbon and graphene) are favorable for improving the electrochemical performance. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：192 / 197

页数：6

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