3D nitrogen and boron dual-doped carbon quantum dots/reduced graphene oxide aerogel for advanced aqueous and flexible quasi-solid-state zinc-ion hybrid capacitors

作     者：Jun-Jun Yao Chang Liu Jing-Ying Li Zhong-Liang Hu Ru-Yi Zhou Chen-Chen Guo Xin-Ru Liu Fei-Fan Yang Yi-Rong Zhu Jun-Jun Yao;Chang Liu;Jing-Ying Li;Zhong-Liang Hu;Ru-Yi Zhou;Chen-Chen Guo;Xin-Ru Liu;Fei-Fan Yang;Yi-Rong Zhu

作者机构：Hunan Key Laboratory of Green Metallurgy and New Energy MaterialsCollege of Materials and Advanced ManufacturingHunan University of TechnologyZhuzhou412007China School of Chemistry and Chemical EngineeringHunan Institute of EngineeringXiangtan411104China National&Local Joint Engineering Research Center for Advanced Packaging Material and TechnologyHunan University of TechnologyZhuzhou412007China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2023年第42卷第7期

页      面：2307-2323页

核心收录：

学科分类：081702[工学-化学工艺] 080801[工学-电机与电器] 0808[工学-电气工程] 08[工学] 0817[工学-化学工程与技术] 

基　　金：financially supported by the Distinguished Young Scientists of Hunan Province(No.2022JJ10024) the National Natural Science Foundation of China(No.21601057) the Natural Science Foundation of Hunan Province(No.2021JJ30216) Key Projects of Hunan Provincial Education Department(No.22A0412) 

主　　题：Carbon quantum dots(CQDs) Graphene aerogel Heteroatom dual-doping Energy storage mechanism Zinc-ion hybrid capacitors(ZHCs) 

摘      要：As prospective energy storage devices,zinc-ion hybrid capacitors(ZHCs)still suffer from unsatisfactory cathode ***,the three dimensional(3D)N,B dual-doped carbon quantum dots/reduced graphene oxide(N,B-CQDs/rGO)composite aerogel is prepared via a onepot hydrothermal *** to the synergism of CQDs modification and N,B dual-doping,the resultant N,B-CQDs/rGO composite aerogel delivers superior electrochemical ***,the as-obtained N,B-CQDs/rGO composite aerogel is served as a cathode for aqueous and flexible quasi-solid-state ZHCs for the first ***,the aqueous N,B-CQDs/rGO//Zn ZHC manifests a large energy density of 96.2 Wh·kg^(-1)at80 W·kg^(-1)and still remains a high energy density of 54.7Wh·kg^(-1)at a superb power density of 80 kW·kg^(-1).Meanwhile,kinetic analyses are employed to elucidate the prominent power performance,and various ex situ tests are undertaken to explore the energy storage mechanism of aqueous *** notably,the flexible quasi-solid-state N,B-CQDs/rGO//Zn ZHC displays a desirable energy density(89.1μWh·cm^(-2)),a superior power density(96,000μW·cm^(-2))and exceptional flexible *** present study offers a valuable reference for designing and developing advanced cathode materials for aqueous and flexible quasi-solid-state ZHCs.