Recent Advances on Boosting the Cell Voltage of Aqueous Supercapacitors

作     者：Qianzhi Gou Shuang Zhao Jiacheng Wang Meng Li Junmin Xue Qianzhi Gou;Shuang Zhao;Jiacheng Wang;Meng Li;Junmin Xue

作者机构：MOE Key Laboratory of Low-Grade Energy Utilization Technologies and SystemsCQU-NUS Renewable Energy Materials and Devices Joint LaboratorySchool of Energy and Power EngineeringChongqing UniversityChongqing 400044People’s Republic of China Department of Materials Science and EngineeringCQU-NUS Renewable Energy Materials and Devices Joint LaboratoryNational University of SingaporeSingapore 117573Singapore 

出 版 物：《Nano-Micro Letters》 (纳微快报（英文版）)

年 卷 期：2020年第12卷第8期

页      面：60-81页

核心收录：

学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：financially supported by research grants from the Natural Science Foundation of China(51702032) Natural Science Foundation of Chongqing(cstc2018jcyjAX0375) Fundamental Research Funds for the Central Universities(2019CDXYDL0007) Key Innovation Project for Clinical Technology of the Second Affiliated Hospital of Army Medical University(2018JSLC0025). 

主　　题：Aqueous supercapacitors Cell voltage Electrodes Electrolytes Asymmetric design 

摘      要：Due to its ultra-fast charge/discharge rate,long cyclic life span,and environmental benignity,aqueous supercapacitor(SC)is considered as a proper nextgeneration energy storage device.Unfortunately,limited by undesirable water electrolysis and unreasonable electrode potential range,aqueous SC normally generates a narrow cell voltage,resulting in a low energy density.To address such challenge,enormous efforts have been made to construct high-voltage aqueous SCs.Despite these achievements,the systematic reviews about this field are still rare.To fill this knowledge gap,this review summarizes the recent advances about boosting the cell voltage of aqueous SCs.From the viewpoint of electrode,doping alkali cations,modulating the electrode mass ratio,and optimizing the surface charge density are regarded as three effective pathways to achieve this goal.However,adjusting the appropriate pH level,introducing redox mediators,and constructing“water-in-saltelectrolyte are other three universal routes from the electrolyte aspect.Furthermore,it is also effective to obtain the high-voltage aqueous SCs through asymmetric design,such as designing asymmetric SCs.The confronting challenges and future development tendency towards the high-voltage aqueous SCs are further discussed.