石墨烯基贵金属催化剂的制备及其对锂-氧气电池性能的影响  

Preparation of Graphene-based Noble Metal Catalysts and their Effects on the Performance of Lithium-oxygen Batteries

作　　者：曾晓苑 张英杰[1,2,3] 李雪 董鹏[1,2,3] ZENG Xiao-yuan;ZHANG Ying-jie;LI Xue;DONG Peng(Faculty of Metallurgy and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,China;National and Local Joint Engineering Laboratory for Lithium-ion Batteries and Materials Preparation Technology,Kunming University of Science and Technology,Kunming 650093,China;Key Laboratory of Advanced Battery Materials of Yunnan Province,Kunming University of Science and Technology,Kunming 650093,China)

机构地区：[1]昆明理工大学冶金与能源工程学院,云南昆明650093 [2]昆明理工大学锂离子电池及材料制备技术国家地方联合工程实验室,云南昆明650093 [3]昆明理工大学云南省先进电池材料重点实验室(筹),云南昆明650093

出　　处：《稀有金属与硬质合金》2019年第2期50-56,共7页Rare Metals and Cemented Carbides

基　　金：国家自然科学基金(51764029;51604132);云南省应用基础研究计划(2017FD091;2017FB085)

摘　　要：锂-氧气电池作为一种拥有超高理论比能量密度的新型电池体系,在电动汽车领域具有良好的应用前景。通过改进的Hummers法和热膨胀法制备还原氧化石墨烯,再由浸渍还原法分别负载不同的贵金属Ru、Ir、Au、Ag,研究石墨烯基不同贵金属催化剂对锂-氧气电池性能的影响作用。研究结果表明,具有较高氧析出催化活性的Ru/RGO和Ir/RGO催化剂的锂-氧气电池的可逆性能与充放电循环稳定性优于采用Ag/RGO和Au/RGO催化剂的锂/氧气电池。Lithium-oxygen batteries,as a new type of battery system with ultra-high theoretical specific energy density,have good application prospects in the field of electric vehicles.Reduced graphene oxide was prepared by modified Hummers method and thermal expansion method,and different noble metals Ru,Ir,Au and Ag were loaded by impregnation reduction method,and the effect of graphene catalysts with different noble metals on the performance of lithium-oxygen batteries were studied.The results show that the reversibility and charge-discharge cycle stability of lithium-oxygen batteries with Ru/RGO and Ir/RGO catalysts with high catalytic activity for oxygen precipitation are better than those of lithium-oxygen batteries with Ag/RGO and Au/RGO catalysts.

关 键 词：还原氧化石墨烯 贵金属 催化剂 浸渍还原法 锂-氧气电池 

分 类 号：TM911.41[电气工程—电力电子与电力传动] TQ426[化学工程]