锂空气电池Co-Pt二元催化剂的性能研究  

Performance of Co-Pt binary catalyst for lithium-air battery

作　　者：杨蕊[1] 肖尧[1] 郎笑石[1] 张钰颖 葛芳[1] 蔡克迪[1] YANG Rui;XIAO Yao;LANG Xiaoshi;ZHANG Yuying;GE Fang;CAI Kedi(Liaoning Engineering Technology Research Center of Supercapacitor, Bohai University, Jinzhou 121013, Liaoning Province, China)

机构地区：[1]渤海大学辽宁省超级电容器工程技术研究中心,辽宁锦州121013

出　　处：《电子元件与材料》2017年第8期50-54,共5页Electronic Components And Materials

基　　金：国家自然科学基金资助项目(No.21206083);辽宁省"百千万人才工程"资助项目(No.201797)

摘　　要：以CoO和Pt催化剂(Co-Pt催化剂)作为二元催化剂并将其应用到锂空气电池中,通过场发射扫描电镜和X射线粉末衍射进行物理表征,采用循环伏安、交流阻抗和恒流充放电法研究样品的电化学性能。结果表明,Co-Pt二元催化剂具有良好的电化学性能,在0.025×10–3A·cm^(–2)的电流密度下首次放电比容量和能量密度分别可达到2225.8 m Ah·g^(–1)和5822.8 m Wh·g^(–1)。The CoO and Pt catalyst(Co-Pt catalyst)as binary catalyst was applied to the lithium-air battery.The physical performances of the Co-Pt catalyst were characterized by field emission scanning electron microscopy(FESEM)and X-ray powder diffraction(XRD),and the electrochemical performances were studied by cyclic voltammetry,AC impedance and constant current charging/discharging.The results show that the Co-Pt binary catalyst has excellent electrochemical performance.The initial discharge specific capacity and the energy density can achieve2225.8mAh·g-1and5822.8mWh·g-1at the current density of0.025×10-3A·cm-2.

关 键 词：锂空气电池 Co-Pt催化剂 放电比容量 能量密度 循环伏安 交流阻抗 

分 类 号：TM911[电气工程—电力电子与电力传动]