CoMoO_4水热法制备及其在锂/钠离子电池中的应用
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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CoMoO_4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,CoMoO_4负极在锂离子电池中的首次可逆比容量为1 403.6mAh/g,首次库伦效率为146.5%,在100mA/g电流密度下经50次循环后仍然高达793.6mAh/g;而CoMoO_4负极在钠离子电池中首次可逆比容量仅为314.2mAh/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.
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 CoMoO_4 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 to76.4% 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.
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 CoMoO_4 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 to76.4% 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.
引文
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[2]WU Xianwen,LI Yehua,XIANG Yanhong,et al.The Electrochemical Performance of Aqueous Rechargeable Battery of Zn/Na0.44MnO2Based on Hybrid Electrolyte[J].Journal of Power Sources,2016,336:35-39.
[3]李润秀,吴显明,陈上,等.Li1+xAlxTi2-x(PO4)3(x=0~0.4)溶胶-凝胶法合成及其性质[J].吉首大学学报(自然科学版),2009,30(3):102-104.
[4]熊利芝,梁凯,侯慧,等.LiVOPO4/C的溶液沉积-热解法制备与表征[J].吉首大学学报(自然科学版),2010,3 1(6):86-89.
[5]WU Xianwen,LI Yehua,LI Chuanchang,et al.The Electrochemical Performance Improvement of LiMn2O4/Zn Based on Zinc Foil as the Current Collector and Thiourea as an Electrolyte Additive[J].Journal of Power Sources,2015,300:453-459.
[6]熊利芝,梁凯,何则强.锂离子在LiVOPO4中的扩散系数的测定[J].吉首大学学报(自然科学版),2011,32(1):85-87.
[7]XIANG Yanhong,WU Xianwen.Enhanced Electrochemical Performances of Li2MnO3 Cathode Materials by Al Doping[J].Ionics,2018,24(1):83-89.
[8]梁凯,莫如宝,刘建本,等.正极材料Li(Ni1/3Co1/3Mn1/3)1-xCrxO2的合成与表征[J].吉首大学学报(自然科学版),2011,32(1):88-92.
[9]XIANG Yanhong,SUN Zhen,LI Jian,et al.Improved Electrochemical Performance of Li1.2Ni0.2Mn0.6O2Cathode Material for Lithium Ion Batteries Synthesized by the Polyvinyl Alcohol Assisted Sol-Gel Method[J].Ceramics International,2017,43:2 320-2 324.
[10]麦发任,吴显明,赵俊海,等.尖晶石型Li4Ti5O12的合成及其性能[J].吉首大学学报(自然科学版),2012,33(5):98-101.
[11]李叶华,陈上,于小林,等.超级电容器过渡金属氧化物电极材料研究进展[J].吉首大学学报(自然科学版),2017,38(2):71-75.
[12]何则强,熊利芝,麻明友,等.CuO掺杂纳米SnO2锂离子电池负极材料的合成与电化学性能[J].吉首大学学报(自然科学版),2009,30(3):91-94.
[13]LI Tao,LI Xinhai,WANG Zhixing,et al.A Novel NiCo2O4 Anode Morphology for Lithium-Ion Batteries[J].Journal of Materials Chemistry A,2015,3:11 970-11 975.
[14]CHEN Huixin,ZHANG Qiaobao,WANG Jiexi,et al.Mesoporous ZnCo2O4 Microspheres Composed of Ultrathin Nanosheets Cross-Linked With Metallic NiSix Nanowires on Ni Foam as Anodes for Lithium Ion Batteries[J].Nano Energy,2014,10:245-258.
[15]LI Yehua,WU Xianwen,WANG Suliang,et al.Surfactant-Assisted Solvothermal Synthesis of NiCo2O4as an Anode for Lithium-Ion Batteries[J].RSC Advances,2017,7:36 909-36 916.
[16]尚金艳,吴贤文,唐悦.Co3O4的水热法制备及其电化学性能[J].吉首大学学报(自然科学版),2018,39(1):75-80.
[17]WU Ling,SHI Shaonan,ZHANG Xiaoping,et al.Room-Temperature Pre-Reduction of Spinning Solution for the Synthesis of Na3V2(PO4)3/C Nanofibers as High-Performance Cathode Materials for Na-Ion Batteries[J].Electrochimica Acta,2018,274:233-241.
[18]WU Ling,HU Yong,ZHANG Xiaoping,et al.Synthesis of Carbon-Coated Na2MnPO4F Hollow Spheres as a Potential Cathode Material for Na-Ion Batteries[J].Journal of Power Sources,2018,374:40-47.
[19]LI Yehua,WU Xianwen.Fabrication of Urchin-Like NiCo2O4 Microspheres Assembled by Using SDS as Soft Template for Anode Materials of Lithium-Ion Batteries[J].Ionics,2018,24(5):1 329-1 337.