Compulsive malposition of birnessite slab in 2D-Parallel birnessite on β-MnO_(2) networks for enhanced pseudocapacitance performances  

作　　者：Shijin Zhua Wangchen Huo Tian Wang Kailin Li Xiaoying Liu Junyi Ji Hongchang Yao Fan Dong Yuxin Zhang Lili Zhang 

机构地区：[1]College of Materials Science and Engreering Chongqing University,Chongqing 400044,China [2]Research Center for Environmental Science&Technology,Institute of Fundamental and Frontier Sciences,University of Electronic Science and Technology of China,Chengdu,611731,China [3]Engineering Research Center for Waste Oil Recovery Technology and Equipment,Ministry of Education,College of Environment and Resources,Chongqing Technology and Business University,Chongqing 400067 China [4]School of Chemical Engineering,State Key Laboratory of Polymer Materials Engineering,Sichuan University,Chengdu,610065,PR China [5]College of Chemistry and Molecular Engineering,Zhengzhou University,Zhengzhou Ciy,Henan Province,450001,PR China

出　　处：《Nano Materials Science》2021年第4期404-411,共8页纳米材料科学（英文版）

基　　金：the National Natural Science Foundation of China(Grant No.51908092);Projects(No.2020CDJXZ001,2020CDCGJ006 and 2020CDCGCL004)supported by the Fundamental Research Funds for the Central Universities,the Joint Funds of the National Natural Science Foundation of China-Guangdong(Grant No.U1801254);the project funded by Chongqing Special Postdoctoral Science Foundation(XmT2018043);the Chongqing Research Program of Basic Research and Frontier Technology(cstc2017jcyjBX0080);Natural Science Foundation Project of Chongqing for Post-doctor(cstc2019jcyjbsh0079,cstc2019jcyjbshX0085);Technological projects of Chongqing Municipal Education Commission(KJZDK201800801);the Innovative Research Team of Chongqing(CXTDG201602014);the Innovative technology of New materials and metallurgy(2019CDXYCL0031).

摘　　要：High electrochemically active bimessite is always desirable pseudocapacitive material for supercapacitor.Here,two-dimensional(2D)compulsive malposition parallel bimessite standing on β-MnO_(2) interconnected networks have been designed.Due to the retrition of β-MnO_(2),compulsi ve malposition,slippage of MnO6 slab,occured in bimessite resulting in weaken bi nding force between bimessi te slab and interlayer cations,which enhanced their electrochemical performances.Additionally,the electrical conductivity of the structure was largely promoted by the 2D charge transfer route and double-exchange mechanism in bimessite,also leading to desirable electro-chemical properties.Based on the fraction of as-prepared nanostructure,the par all bimessite exhibited good pseudocapacitance performance(660 F g^(-1))with high rate capability.In addition,the asymmetrice supercapacitor assembled by reduced graphene oxide(RGO)and as-prepared nanostructure,which respectively served as the negative and positive eletrode,delivered an energy density of 33.1 Wh kg^(-1) and a mad mum power density of 64.0 kW kg^(-1) with excellent cyeling stability(95.8% after 10000 cycles).Finally,the study opens new avenwes for synthesizing high eletrochemically actiwe bimessite structure for high-performance energy storage devices.

关 键 词：Parallel birnessite Double-exchange mechanism Supercapacitor Energy storage devices 

分 类 号：TQ137.12[化学工程—无机化工] TM53[电气工程—电器]