Electrodes with Electrodeposited Water-excluding Polymer Coating Enable High-Voltage Aqueous Supercapacitors

作     者：Wujie Dong Tianquan Lin Jian Huang Yuan Wang Zhichao Zhang Xin Wang Xiaotao Yuan Jie Lin I-Wei Chen Fuqiang Huang 

作者机构：State Key Laboratory of High Performance Ceramics and Superfine MicrostructureShanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China State Key Laboratory of Rare Earth Materials Chemistry and ApplicationsCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China Department of Materials Science and EngineeringUniversity of PennsylvaniaPhiladelphiaPA 19104USA 

出 版 物：《Research》 (研究（英文）)

年 卷 期：2020年第2020卷第1期

页      面：711-723页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070305[理学-高分子化学与物理] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：This work was financially supported by the National Key R&D Program of China(Grant no.2016YFB0901600) the Science and Technology Commission of Shanghai Municipality(Grant no.16JC1401700) the Key Research Program of Chinese Academy of Sciences(Grants no.QYZDJ-SSW-JSC013 and KGZD-EW-T06) T.Lin acknowledges support from Outstanding Youth Science Foundation(Grant No.51922103) W.Dong was funded by the China Postdoctoral Science Foundation(Grant No.2020M671242) the Special Research Assistant Program of Chinese Academy of Sciences the Super Postdoctoral Fellow Program of Shanghai 

主　　题：lithium durability battery 

摘      要：Aqueous supercapacitors are powerful energy sources,but they are limited by energy density that is much lower than lithium-ion *** raising the voltage beyond the thermodynamic potential for water splitting(1.23 V)can boost the energy density,there has been much effort on water-stabilizing salvation additives such as Li_(2)SO_(4) that can provide an aqueous electrolyte capable of withstanding~1.8 *** by the first-principles calculations that reveal water can promote hydrogen and oxygen evolution reactions,here,we pursue a new strategy of covering the electrode with a dense electroplated polymerized polyacrylic acid,which is an electron insulator but a proton conductor and proton *** combined effect of salvation and coating expands the electrochemical window throughout pH 3 to pH 10 to 2.4V for both fast and slow proton-mediated redox *** allows activated carbon to quadruple the energy density,a kilogram of nitrogen-doped graphene to provide 127 Watt-hour,and both to have improved endurance because of suppression of water-mediated ***,aqueous supercapacitors can now achieve energy densities quite comparable to that of a lithium-ion battery,but at 100 times the charging/discharging speed and cycle durability.