Hierarchical mesoporous Li2Mn0.5Fe0.5SiO4 and Li2Mn0.5Fe0.5SiO4/C assembled by nanoparticles or nanoplates as a cathode material for lithium-ion batteries

被引：27
|
作者：
Jiang, Xiaolei [1 ]
Xu, Huayun [1 ]
Liu, Jing [1 ]
Yang, Jian [1 ]
Mao, Hongzhi [1 ]
Qian, Yitai [1 ,2 ]
机构：
[1] Shandong Univ, Sch Chem & Chem Engn, Minist Educ, Key Lab Colloid & Interface Chem, Jinan 250100, Peoples R China
[2] Univ Sci & Technol China, Dept Chem, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Peoples R China
来源：
NANO ENERGY | 2014年 / 7卷
基金：
中国国家自然科学基金;
关键词：
Li2Mn0.5Fe0.5SiO4; Hydrothermal synthesis; Electrochemical properties; ELECTROCHEMICAL PERFORMANCE; CARBON; LI2MNSIO4; LI2FESIO4; CAPACITY; COMPOSITE;
D O I：
10.1016/j.nanoen.2014.04.005
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：
Hierarchical mesoporous Li2Mn0.5Fe0.5SiO4 consisted of nanoparticles or nanoplates has been successfully synthesized for the first time by a hydrothermal method. Their carbon-coated composites are obtained by a heat treatment in the presence of citric acid. These composites were characterized by powder X-ray diffractometry, scanning and transmission electron microscopy, Raman spectroscopy, and thermogravimetric analysis. The lithium storage capacity and cycling performance of the optimized Li2Mn0.5Fe0.5SiO4/C composite are greatly enhanced when tested as a cathode material in lithium-ion batteries (LIBs). It exhibits a discharge capacity of 125 mAh g(-1) after 60 cycles at a rate of 0.1 C. This superior electrochemical property could be ascribed to high purity and mesoporous structure of Li2Mn0.5Fe0.5SiO4, which greatly enhances the electronic conductivity as well as the diffusion coefficient of lithium ions. (C) 2014 Elsevier Ltd. All rights reserved.
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页码：1 / 9
页数：9
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