Synergistic Design of Flexible Nanopapers for High-Performance Proton PseudocapacitorsOA
Two-dimensional materials for flexible energy storage commonly facehuge challenges in limited active surface and hindered charge transport.Herein,wereport an innovative asymmetric pseudocapacitor based on synergistic design of modifiedMXene and graphene,integrating gas-induced rapid expansion technology andprecise surface chemical regulation methods.For graphene modification,rapid vaporizationinduces exfoliation and expansion of graphene oxide layers.Subsequently,pseudocapacitiveoxygen-containing groups were selectively introduced through acid oxidation,yielding expanded-and-oxidized graphene(OEG)for positive porous-nanopaperelectrode.For MXene modification,alkali-treated MXene underwent hydrazine assistance to facilitate gas expansion and-NH_(2)grafting,producing MXene-NH_(2)(NOM)for negative porous-nanopaper electrode.Density functional theory calculations show that-COOH moreeffectively modulate graphene’s electronic structure by inducing charge redistribution and creating active sites,thereby enhancing H^(+)adsorption and ion interactions compared to-OH.Meanwhile,-NH_(2)on MXene enable electron delocalization and dynamic Ti-N-H^(+)interactions,speeding up proton adsorption/desorption and boosting both pseudocapacitance and conductivity.Through collaborativeoptimized spatial architecture and surface properties,flexible OEGB and NOMB exhibited of 333.6 and 500.5 F g^(-1)at high mass loading,respectively.The assembled proton pseudocapacitor readily achieved energy and power densities of 58.9 Wh kg^(-1)and 3802 W kg^(-1),respectively,with excellent stability for potential applications.
Jiayue Dong;Zhaoqing Lu;Li Hua;Zizhan Guo;Xiaoxu Xu;Jinlong Wu;Fengfeng Jia;Yuanming Wang
College of Bioresources Chemical and Materials Engineering,Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development,National Demonstration Center for Experimental Light Chemistry Engineering Education,Shaanxi University of Science and Technology,Xi’an 710021,People’s Republic of ChinaCollege of Bioresources Chemical and Materials Engineering,Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development,National Demonstration Center for Experimental Light Chemistry Engineering Education,Shaanxi University of Science and Technology,Xi’an 710021,People’s Republic of ChinaCollege of Bioresources Chemical and Materials Engineering,Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development,National Demonstration Center for Experimental Light Chemistry Engineering Education,Shaanxi University of Science and Technology,Xi’an 710021,People’s Republic of China Shaanxi ParaDe Advanced Material Technology Co.,LTD,Building 5,Western Life Science Park,Fengdong New District,Xixian New Area,Xianyang 712000,People’s Republic of ChinaCollege of Bioresources Chemical and Materials Engineering,Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development,National Demonstration Center for Experimental Light Chemistry Engineering Education,Shaanxi University of Science and Technology,Xi’an 710021,People’s Republic of ChinaCollege of Bioresources Chemical and Materials Engineering,Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development,National Demonstration Center for Experimental Light Chemistry Engineering Education,Shaanxi University of Science and Technology,Xi’an 710021,People’s Republic of ChinaCollege of Bioresources Chemical and Materials Engineering,Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development,National Demonstration Center for Experimental Light Chemistry Engineering Education,Shaanxi University of Science and Technology,Xi’an 710021,People’s Republic of ChinaCollege of Bioresources Chemical and Materials Engineering,Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development,National Demonstration Center for Experimental Light Chemistry Engineering Education,Shaanxi University of Science and Technology,Xi’an 710021,People’s Republic of ChinaCollege of Bioresources Chemical and Materials Engineering,Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development,National Demonstration Center for Experimental Light Chemistry Engineering Education,Shaanxi University of Science and Technology,Xi’an 710021,People’s Republic of China
信息技术与安全科学
MXeneGrapheneSpatial architectureSurface chemistryProton-type pseudocapacitor
《Nano-Micro Letters》 2026 (5)
P.424-444,21
supported by the National Nature Science Foundation of China(No.52402126)Shaanxi Province Qin Chuangyuan general window four chain integration project(No.2024PT-ZCK-09)Shaanxi Province military-civilian integration project(Shaanxi finance office【2024】22nd)Qinchuangyuan introducing high-level innovation and entrepreneurship talent projects(NO.QCYRCXM-2022-343)the China Postdoctoral Science Foundation(Grant Number:2025M772524)National Nature Science Foundation of China(22508239).
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