γ-MnO2 nanorods/graphene composite as efficient cathode for advanced rechargeable aqueous zinc-ion battery

作     者：Chao Wang Yinxiang Zeng Xiang Xiao Shijia Wu Guobin Zhong Kaiqi Xu Zengfu Wei Wei Su Xihong Lu Chao Wang;Yinxiang Zeng;Xiang Xiao;Shijia Wu;Guobin Zhong;Kaiqi Xu;Zengfu Wei;Wei Su;Xihong Lu

作者机构：Electric Power Research Institute of Guangdong Power Grid Co.Ltd.Guangzhou 510080GuangdongChina MOE of the Key Laboratory of Bioinorganic and Synthetic ChemistryThe Key Lab of Low-Carbon Chem&Energy Conservation of Guangdong ProvinceSchool of ChemistrySun Yat-Sen UniversityGuangzhou 510275GuangdongChina 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2020年第29卷第4期

页      面：182-187页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：financially supported by the Guangdong Power Grid Co. Ltd.(Grant No.GDKJXM20160000) 

主　　题：γ-MnO2 Graphene Zinc-ion battery High-capacity cathode 

摘      要：Aqueous Zn//MnO2 batteries are emerging as promising large-scale energy storage devices owing to their cost-effectiveness,high safety,high output voltage,and energy ***,the MnO2 cathode suffers from intrinsically poor rate performance and rapid capacity ***,we remove the roadblock by compositing MnO2 nanorods with highly conductive graphene,which remarkably enhances the electrochemical properties of the MnO2 *** from the boosted electric conductivity and ion diffusion rate as well as the structural protection of graphene,the Zn//MnO2-graphene battery presents an admirable capacity of 301 mAh g^-1 at 0.5 A g^-1,corresponding to a high energy density of 411.6 Wh kg^-*** at a high current density of 10 A g^-1,a decent capacity of 95.8 mAh g^-1 is still obtained,manifesting its excellent rate ***,an impressive power density of 15 kW kg^-1 is achieved by the Zn//MnO2-graphene battery.