Synthesis of Li2Mn1-xNixSiO4/C nanocomposites with enhanced electrochemical properties via citric acid assisted sol-gel method

被引：11
作者：
Wu, Tingting [1 ]
Lai, Chunyan [1 ]
Xu, Qunjie [1 ]
机构：
[1] Shanghai Univ Elect Power, Shanghai Key Lab Mat Protect & Adv Mat Elect Powe, Shanghai 200090, Peoples R China
来源：
MATERIALS LETTERS | 2017年 / 186卷
基金：
中国国家自然科学基金;
关键词：
Cathode material; Lithium orthosilicate; Nanocomposites; Nickel doping; Electrical properties; CATHODE MATERIALS; HIGH-CAPACITY; PERFORMANCE; LI2MNSIO4; LI2FESIO4; NI;
D O I：
10.1016/j.matlet.2016.10.023
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Li2Mn1-xNixSiO4/C (x=0, 0.02, 0.04, 0.06, and 0.08) nanocomposites were successfully prepared by a citric acid assisted sol-gel method. The physical properties and electrochemical performance test results showed that substituting part of Mn2+ with Ni2+ was effective in reducing the agglomeration phenomenon, decreasing the particle size, and enhancing the electrochemical properties. In particular, Li2Mn0.94Ni0.06SiO4/C delivered the highest initial discharge capacity of about 182.9 mA h g(-1) at 0.1 C, which was related to the decreased charge transfer resistance and enhanced lithium ion diffusion for Ni-doped samples.
引用
收藏
页码：293 / 297
页数：5
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