A high over-potential binder-free electrode constructed of Prussian blue and MnO2 for high performance aqueous supercapacitors

作     者：Gaowei Zhang Hua Yao Feng Zhang Zitao Gao Qiujun Li Yangyi Yang Xihong Lu 

作者机构：School of Materials Science and EngineeringSchool of ChemistrySun Yat-sen UniversityGuangzhou 510275China College of Chemistry and Pharmaceutical EngineeringHuanghuai UniversityZhumadian 463000China 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2019年第12卷第5期

页      面：1061-1069页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

基　　金：the National Natural Science Foundation of China (Nos.51472275,20973203 and 91022012) Guangdong Natural Science Foundation (No.2014A030313207) as well as Laboratory Open Fund Project of Sun Yat-sen University (No.201610310003) 

主　　题：coordination superamolecular networks Prussian blue high operating voltage binder-free electrode aqueous supercapacitors 

摘      要：Extending the potential window of aqueous supercapacitors (SCs) up to 2.0 V is still a great *** on their good dynamic structural reversibility and open framework structure,the coordination superamolecular networks (CSNs) exhibit rapid charge/discharge ability and excellent cycle *** a typical coordination superamolecular network (CSN),Prussian blue (denoted as CSN-PB),which self-assembled by the CN-ligand and iron ions is firstly in-situ grown on carbon cloth,followed by electro-deposition of MnO2 to form CSN-PB/MnO2 composite *** from synergistic effect of the constituent components,as well as the open framework structure of CSN-PB,this composite electrode reaches a high potential window of 1.4 V (***/AgCl) and delivers a good specific capacitance of 315.3 F·g^-1 in aqueous *** aqueous asymmetric device,constructed with CSN-PB/MnO2 composite as cathode and activated carbon as anode,can work in a stable potential window of 2.4 V,exhibits a high energy density of 46.13 Wh·kg^-1 and excellent cycling stability with 85.5% capacitance retention after 20,000 *** work provides a new concept of high dynamic structural reversibility from CSNs to increase the cell voltage of asymmetric SCs for further boosting energy density.