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第 35 卷第 7 期 精 细 化 工 Vol.35, No.7
201 8 年 7 月 FINE CHEMICALS July 2018

功能材料
碳包覆锂锰钒氧纳米材料的制备及其电化学性能

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崔朝军 1,2 ，段林波 ，李现常 ，高倩倩 ，戴玉强
（1. 同济大学 物理科学与工程学院, 上海 200092；2. 安阳工学院 数理学院，河南 安阳 455000）
摘要：以醋酸锂、醋酸锰、五氧化二钒、过氧化氢为原料，葡萄糖作碳源，采用溶胶-凝胶法结合水热合成技术
制备了不同碳质量分数的碳包覆锂锰钒氧纳米材料 LiMnVO 4 /C。利用 SEM、TEM、XRD、Raman、EDS、TG
对其形貌和结构进行了表征。结果表明，所制备的纳米材料呈立方晶系结构，经碳包覆后的复合纳米材料的颗
粒分散性较好。电化学测试结果表明，在相同的测试条件(充放电电压为 0.01~3.00 V，充放电电流密度为 100 mA/g)
下，碳质量分数为 0%、5%、10%和 15%的碳包覆锂锰钒氧纳米材料的首次充电比容量分别为 682、686、696
和 580 mA·h/g，60 次循环后的充电比容量分别为 226、336、513 和 440 mA·h/g。因此，碳质量分数为 10%
的碳包覆锂锰钒氧纳米材料具有较好的循环稳定性和较高的充电比容量。合适的碳包覆质量分数不仅能提高纳
米电极材料的界面稳定性，抑制晶粒的长大和团聚，而且能改善复合电极材料的电子导电性。
关键词：碳包覆；锂锰钒氧；负极材料；锂离子电池；功能材料
中图分类号：O611 文献标识码：A 文章编号：1003-5214 (2018) 07-1144-06

Synthesis and Electrochemical Performance of
Carbon-coated LiMnVO 4 Nanomaterials

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CUI Chao-jun , DUAN Lin-bo , LI Xian-chang , GAO Qian-qian , DAI Yu-qiang
（1. School of Physics Science and Engineering, Tongji University, Shanghai 200092, China; 2. School of Mathematics
and Physics, Anyang Institute of Technology, Anyang 455000, Henan, China）
Abstract: Carbon-coated LiMnVO 4 nanomaterials (LiMnVO 4/C) with different carbon mass fraction were
synthesized by a combined sol-gel method and hydrothermal process, using lithium acetate, manganese
acetate, vanadium pentoxide and hydrogen peroxide as raw materials and glucose as carbon source. The
as-prepared samples were characterized by SEM, TEM, XRD, Raman, EDS and TG. The results indicated
that the nanomaterials presented cubic crystal structure, and had good dispersibility. Electrochemical
measurement results confirmed that carbon-coated LiMnVO 4 nanomaterials with different carbon mass
fraction (0%, 5%, 10% and 15%) as anode materials for lithium-ion-batteries delivered initial reversible
capacities of 682, 686, 696 and 580 mA·h/g under the same conditions(0.01~3.00 V, 100 mA/g), while the
corresponding reversible capacities remained 226, 336, 513 and 440 mA·h/g after 60 cycles. Carbon-coated
LiMnVO 4 nanomaterial with 10% carbon mass fraction had better cycling stability and higher reversible
capacity. This was mainly due to the fact that the appropriate amount of carbon not only increased the
interface stability of nanomaterials, inhibited the growth and agglomeration of grains, but also improved the
electronic conductivity of composite electrode materials.
Key words: carbon-coated; LiMnVO 4; anode materials; lithium-ion batteries; functional materials
Foundation items: National Natural Science Foundation of China (51472182); Anyang Municipal Scientific
and Technological Project (2015045038); National College Students' Innovation Entrepreneurship Training
Program (201611330020); Foundation of Anyang Institute of Technology (YJJ2018002)

收稿日期：2017-11-02; 定用日期：2018-03-19; DOI: 10.13550/j.jxhg.20170899
基金项目：国家自然科学基金（51472182）；安阳市科技攻关项目（2015045038）；国家级大学生创新创业训练计划项目
（201611330020）； 安阳工学院校基金（YJJ2018002）
作者简介：崔朝军（1974—），男，副教授，E-mail：cuichaojun@163.com。