余蕊冰;林应斌;朱伟波;黄志高;

• 1:福建师范大学物理与能源学院福建省量子调控与新能源材料重点实验室

摘要(Abstract)：

采用溶胶凝胶方法合成Li[Li0.2Mn0.54Ni0.13Co0.13]O2富锂正极材料,通过化学沉积技术在Li[Li0.2Mn0.54Ni0.13Co0.13]O2颗粒表面沉积La F3颗粒.利用X-射线衍射(XRD)、扫描电子显微镜(SEM)、充放电测试、循环伏安及交流阻抗测试系统研究了La F3包覆对材料电化学性能的影响.合成的材料具有α-Na Fe O2层状结构且La F3颗粒均匀包覆在颗粒表面,表面修饰La F3后的样品表现出更高的比容量和更好的倍率性能,电化学性能测试表明La F3表面修饰层有助于缓解电解液中HF对活性材料的腐蚀,降低电荷跃迁电阻(Rct),增强锂离子的扩散能力.

关键词(KeyWords)： 锂离子电池;富锂正极材料;表面修饰;LaF3

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(11344008);; 福建省自然科学基金资助项目(2013J01007);; 福建省教育厅新世纪人才(JA14069)

作者(Authors): 余蕊冰;林应斌;朱伟波;黄志高;

参考文献(References)：

• [1]Shi S J,Tu J P,Tang Y Y,et al.Synthesis and electrochemical performance of Li1.131Mn0.504Ni0.243Co0.122O2[J].Journal of Power Sources,2013,211:300-307.
• [2]Gurpreet Singh,Wes W C,Soler J,et al.In situ Raman spectroscopy of layered solid solution Li2Mn O3-Li MO2(M=Ni,Mn,Co)[J].Journal of Power Sources,2012,218:34-38.
• [3]Debasish Mohanty,Sergiy Kalnaus,Roberta A Meisner,et al.Structural transformation of a lithium-rich Li1.2Co0.1Mn0.55Ni0.15O2cathode during high voltage cycling resolved byin situ X-raydiffraction[J].Journal of Power Sources,2013,229:239-248.
• [4]Mehmet Nurullah Ates,Sanjeev Mukerjee,Abraham K M.A Li-rich layered cathode material with enhanced structural stability and rate capability for Li-ion batteries[J].Journal of the Electrochemical Society,2014,161(3):355-363.
• [5]Jing Mao,Kehua Dai,Yuchun Zha.Electrochemical studies of spinel Li Ni0.5Mn1.5O4cathodes with different particle morphologies[J].Electrochimica Acta,2012,63:381-390.
• [6]Yansong Bai,Xianyou Wang,Xiaoyan Zhang,et al.The kinetics of Li-iond eintercalationin the Li-rich layered Li1.12[Ni0.5Co0.2Mn0.3]0.89O2studied by electrochemical impedancespectroscopy and galvanostatic intermittent titration technique[J].Electrochimica Acta,2013,109:355-364.
• [7]Zhiyuan Wang,Enzuo Liu,Chunnian He,et al.Effect of amorphous Fe PO4coating on structure and electrochemical performance[J].Journal of Power Sources,2013,236:25-32.
• [8]Zheng J M,Li J,Zhang Z R,et al.The effect of Ti O2coating on the electrochemical performance of Li[Li0.2Mn0.54Ni0.13Co0.13]O2cathode material for lithium-ion battery[J].Solid State Ionics,2008,179:1794–1799.
• [9]Shi S J,Tu J P,Tang Y Y,et al.Enhanced cycling stability of Li[Li0.2Mn0.54Ni0.13Co0.13]O2by surface modificationof Mg O with melting impregnation method[J].Electrochimica Acta,2013,88:671-679.
• [10]吴承仁,赵长春,王兆翔,等.锂离子电池用富锂层状正极材料[J].化学进展,2011,23(10):2038-2043.
• [11]Lu Chao,Wu Hao,Zhang Yun,et al.Ceriumfluoride coated layered oxide Li1.2Mn0.54Ni0.13Co0.13O2as cathode materials with improved electrochemical performance for lithium ion batteries[J].Journal of Power Sources,2014,267:682-691.
• [12]Hwang B J,Wu Y W,Venkateswarlu M,et al.Influence of synthesis conditions on electrochemical properties of highvoltage Li1.02Ni0.5Mn1.5O4spinel cathode material[J].Journal of Power Sources,2009,193:828-833.
• [13]Johnson C S,Kim J S,Lefief C,et al.The significance of the Li2Mn O3componentin‘composite’x Li2Mn O3·(1-x)Li Mn0.5Ni0.5O2electrodes[J].Electrochemistry Communications,2014,6:1085-1091.
• [14]Shi S J,Tu J P,Tang Y Y,et al.Ombustion synthesis and electrochemical performance of Li[Li0.2Mn0.54Ni0.13Co0.13]O2with improved rate capability[J].Journal of Power Sources,2013,228:14-23.
• [15]Liu Jun,Wang Qiongyu,Reeja Jayan B,et al.Carbon-coated high capacity layered Li[Li0.2Mn0.54Ni0.13Co0.13]O2cathodes[J].Electrochemistry Communications,2010,12:750-753.
• [16]Wang Sihui,Wu Yan,Li Yixiao,et al.Li[Li0.2Mn0.54Ni0.13Co0.13]O2-Li Mn1.5Ti0.5O4composite cathodes with improved electrochemical performance for lithium ion batteries[J].Electrochimica Acta,2014,133:100-106.
• [17]邓胜男,施志聪,郑隽.正极材料Li[Li0.2Mn0.54Ni0.13Co0.13]O2的表面包覆改性研究[J].电源技术,2012,36:463-466.
• [18]Liu Jinlong,Liu Jingyuan,Wang Renhe,et al.Degradation and structural evolution of x Li2Mn O3·(1-x)Li Mn1/3Ni1/3Co1/3O2during cycling[J].Journal of the Electrochemical Society,2014,161:160-167.
• [19]Han Enshan,Li Yanpu,Zhu Linzhi,et al,The effect of Mg O coating on Li1.17Mn0.48Ni0.23Co0.12O2cathode material for lithium ion batteries[J].Solid State Ionics,2014,255:113-119.
• [20]Tirupathi Rao Penki,Shanmughasundaram D,Jeyaseelan A V,et al.Polymer template assisted synthesis of porous Li1.2Mn0.53Ni0.13Co0.13O2as a high capacity and high rate capability positive electrode material[J].Journal of the Electrochemical Society,2014,161:33-39.
• [21]Zhao Taolin,Chen Shi,Li Li,et al.Synthesis,characterization,and electrochemistry of cathode material Li[Li0.2Mn0.54Ni0.13Co0.13]O2using organic chelating agents for lithium-ion batteries[J].Journal of Power Sources,2013,228:206-213.
• [22]庄全超,徐守冬,邱祥云.锂离子电池的电化学阻抗谱分析[J].化学进展,2010,22(6):1043-1057.
• [23]Shi S J,Tu J P,Mai Y J,et al.Structure and electrochemical performance of Ca F2coated Li Mn1/3Ni1/3Co1/3O2[J].Electrochimica Acta,2012,83:115-112.
• [24]Yang Zhanxu,Qiao Qingdong,Yang Wensheng,et al.Improvement of structural and electrochemical properties of commercial Li Co O2by coating with La F3[J].Electrochimica Acta,2011,56:4791-4796.
• [25]Lin Jing,Mu Daobin,Jin Ying,et al.Li-rich layered composite Li[Li0.2Ni0.2Mn0.6]O2synthesized by a novel approach as cathode material for lithium ion battery[J].Journal of Power Sources,2013,230:76-80.