Construction of Frame-Structured Flexible MXene Film Electrode to Achieve High Areal Capacitance Micro-Supercapacitor

查看全文 作　　者：Yesheng [1]Wang;Yongpeng [1]Cui;Dongqing [1]Kong;Xiaoning [1]Wang;Wenting [1]Feng;Pengyun [1]Liu;Tonghui [1]Cai;Xuejin [1]Li;Lianming [1]Zhao;Debin [2]Kong;Linjie [2]Zhi;Qingzhong [1]Xue;Zifeng [1]Yan;Wei [1]Xing

机构地区：[1]School of Materials Science and Engineering,State Key Laboratory of Heavy Oil Processing,China University of Petroleum(East China),Qingdao 266580;[2]College of New Energy,Advanced Chemical Engineering and Energy Materials Research Center,China University of Petroleum(East China),Qingdao 266580

出　　处：《Renewables》索引2023年第1卷第2期,共14页

基　　金：the National Natural Science Foundation of China(grant nos.51877216,52277229,and 22109178);Natural Science Foundation of Shandong Province(grant nos.ZR2020MB078,ZR2021QB085,and ZR2022MB094);National Key Research and Development of China(grant no.2022YFA1503400);Postdoctoral Innovative Talent Support Program of Shandong Province(grant no.SDBX2021005). 摘　　要：Two-dimensional MXene-based film materials as flexible electrodes have been widely studied in wearable microsupercapacitors(MSCs).However,the existence of strong van derWaals interactions leads to serious self-stacking ofMXene layers,resulting in poor ionic dynamics and loss of active sites,which causes MXene film electrodes to exhibit low capacitance and poor rate performance in practical studies.To solve this,a frame-structured hybrid film(labeled as CN-MX hybrid film)is constructed by introducing intercalating agents(nanometer g-C_(3)N_(4))into MXene layers.In this unique hybrid film,the g-C_(3)N_(4)nanoparticles rationally occupy the interspace between MXene layers so as to alleviate layer stacking,thus effectively expanding the electrochemically active surface and promoting proton transfer.Synergistic pseudocapacitance inducted by g-C_(3)N_(4)surface groups,consequently,the CN-MX hybrid film electrode achieves an enhanced capacitive capability.In the three-electrode system,this frame-structured film electrode exhibits an ultra-high areal capacitance of 1932.8 mF cm^(−2).The assembled symmetry flexible MSC device based on CN-MX hybrid film can achieve an energy density of 2.28μWh cm^(−2)at 0.075 mW cm^(−2),as well as a superior cyclic stability with 90.4%retention after 700 cycles in alternating 90o bending and releasing states,revealing its potential in practical applications. 关键词：MXene-based film g-C_(3)N_(4) frame-structured high areal capacitance flexible electrode

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Construction of Frame-Structured Flexible MXene Film Electrode to Achieve High Areal Capacitance Micro-Supercapacitor

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