CoMoO4水热法制备及其在锂/钠离子电池中的应用

doi:10.13438/j.cnki.jdzk.2019.01.018

吉首大学学报（自然科学版）

CoMoO₄水热法制备及其在锂/钠离子电池中的应用

陈美艳，杨庆，吴贤文，邹莉，姚正西，李方宁

(1.吉首大学化学化工学院,湖南吉首 416000；2.湖南省有色地质勘查局二四五队，湖南吉首 416000)

出版日期:2019-01-25 发布日期:2019-01-26
通讯作者: 杨庆（1984—），男，湖南吉首人，湖南省有色地质勘查局二四五队分析测试中心主任（E-mail:277461221@qq.com)；吴贤文（1983—），男，湖南张家界人，博士，吉首大学化学化工学院副教授(E-mail:wxwcsu2011@163.com).
基金资助:
国家自然科学基金资助项目（51704124，51762017）；湖湘青年英才支持计划项目（2018RS3098）；吉首大学大学生研究性学习和创新性实验项目（201685）

Synthesis of CoMoO4 and Its Application in Sodium/Lithium Ion Battery

CHEN Meiyan,YANG Qing,WU Xianwen,ZOU Li,YAO Zhengxi,LI Fangning

(1.College of Chemistry and Chemical Engineering,Jishou University,Jishou 416000,Hunan China;2.Nonferrous Geological Exploration Bureau of Hunan Province,Jishou 416000,Hunan China)

Online:2019-01-25 Published:2019-01-26

摘要/Abstract

摘要：

碳基负极材料比容量低，无法满足高能量密度电池的需求.为了进一步寻找高容量长循环寿命的电池负极材料，采用水热反应法制备了自支撑CoMoO₄负极，通过X射线衍射（XRD）和扫描电子显微镜（SEM）对材料的结构、形貌进行表征，利用循环伏安法和恒电流充/放电等技术对比研究了材料在锂/钠离子电池中的电化学性能.结果表明,CoMoO₄负极在锂离子电池中的首次可逆比容量为1 403.6 mAh/g，首次库伦效率为146.5%，在100 mA/g电流密度下经50次循环后仍然高达793.6 mAh/g；而CoMoO₄负极在钠离子电池中首次可逆比容量仅为314.2 mAh/g，但经50次循环后容量保持率仍有76.4 %.该自支撑负极无需导电剂和粘结剂，电极材料与泡沫镍结合力强，具有优异的循环稳定性.

关键词： 锂/钠离子电池, 电极材料, 电化学性能, 电池比容量, 水热法

Abstract:

The specific capacity of carbon-based anode material is low and can't meet the demand of battery with high energy density.To search for the anode material of battery with high capacity and long cycle life,the CoMoO₄ electrode was prepared through hydrothermal method.The structure and morphology of as-prepared material were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM).The electrochemical performances were investigated using cyclic voltammetry and galvanostatic charge/discharge measurement.The results showed that as it was applied to anode forlithium-ion batteries (LIBs),the initial reversible capacity was 1 403.6 mAh/g and the initial coulombic efficiency was up to 146.5%,and the specific reversible capacity retained up to 793.6 mAh/g even after 50 cycles at a current density of 100 mA/g.Furthermore,as it was applied into the anode material of sodium ion battery,the initial specific reversible capacity was only 314.2 mAh/g.However,the capacity retention was up to 76.4% after 50 cycles.There was no conductive and binder for the self-standing anode,and there was strong binding force between electrode material and nickel foam.Meanwhile,the excellent cycling stability was attributed to the small electrochemical transfer impedance.

Key words: lithium/sodium ion battery, electrode material, electrochemical performance, specific capacity of battery, hydrothermal method

陈美艳，杨庆，吴贤文，邹莉，姚正西，李方宁. CoMoO₄水热法制备及其在锂/钠离子电池中的应用[J]. 吉首大学学报（自然科学版）, DOI: 10.13438/j.cnki.jdzk.2019.01.018.

CHEN Meiyan,YANG Qing,WU Xianwen,ZOU Li,YAO Zhengxi,LI Fangning. Synthesis of CoMoO4 and Its Application in Sodium/Lithium Ion Battery[J]. Journal of Jishou University（Natural Sciences Edition), DOI: 10.13438/j.cnki.jdzk.2019.01.018.

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CoMoO₄水热法制备及其在锂/钠离子电池中的应用

Synthesis of CoMoO4 and Its Application in Sodium/Lithium Ion Battery

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