Charge storage mechanism of MOF-derived Mn2O3 as high performance cathode of aqueous zinc-ion batteries

作     者：Min Mao Xingxing Wu Yi Hu Qunhui Yuan Yan-Bing He Feiyu Kang Min Mao;Xingxing Wu;Yi Hu;Qunhui Yuan;Yan-Bing He;Feiyu Kang

作者机构：Tsinghua Shenzhen International Graduate SchoolDivision of Energy&EnvironmentTsinghua UniversityShenzhen 518055GuangdongChina Laboratory of Advanced MaterialsDepartment of Materials Science and EngineeringTsinghua UniversityBeijing 100084China State Key Laboratory of Advanced Welding and Joiningand School of Materials Science and EngineeringHarbin Institute of Technology(Shenzhen)Shenzhen 518055GuangdongChina 

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

年 卷 期：2021年第30卷第1期

页      面：277-283,I0009页

核心收录：

学科分类：081702[工学-化学工艺] 0808[工学-电气工程] 08[工学] 0817[工学-化学工程与技术] 

基　　金：supported by the National Natural Science Foundation of China (51672156) Local Innovative Research Teams Project of Guangdong Pearl River Talents Program (No. 2017BT01N111) Guangdong Province Technical Plan Project (2017B010119001) Shenzhen Technical Plan Project (JCYJ20170817161221958 and JCYJ20170412170706047) Shenzhen Graphene Manufacturing Innovation Center (201901161513) 

主　　题：Zinc ion batteries α-Mn2O3 Metal-organic framework(MOF) Charge storage mechanism 

摘      要：Aqueous Zinc-ion batteries(ZIB) are attracting immense attention because of their merits of excellent safety and quite cheap properties compared with lithium-ion batteries(LIB).Manganese oxide is one of the most important cathode materials of *** this paper,α-Mn2O3 used as cathode of ZIB is synthesized via Metal-Organic Framework(MOF)-derived method,which delivers a high specific capacity of225 mAh g^(-1) at 0.05 A g^(-1) and 92.7 mAh g^(-1) after 1700 cycles at 2 A g^(-1).The charge storage mechanism of α-Mn2O3 cathode is found to greatly depend on the discharge current *** lower current density discharging,the H+ and Zn2+ are successively intercalated into the α-Mn2O3 before and after the turning point of discharge voltage and their discharging products present obviously different morphologies changing from flower-like to large plate-like *** a higher current density,the low-voltage plateau after the turning point disappears due to the decrease of amount of Zn2+ intercalation and the H+intercalation is dominated in α-Mn2 *** study provides significant understanding for future design and research of high-performance Mn-based cathodes of ZIB.