Wafer-scale quasi-layered tungstate-doped polypyrrole film with high volumetric capacitance  

作　　者：Huabo Liu Jiaxing Liang John Watt Richard D.Tilley Rose Amal Da-Wei Wang 

机构地区：[1]School of Chemical Engineering,University of New South Wales,Sydney,NSW 2052,Australia 2 Center for Integrated Nanotechnologies,Los Alamos National Laboratory,Los Alamos,NW 87545,USA 3 School of Chemistry,University of New South Wales,Sydney,NSW 2052,Australia

出　　处：《Nano Research》2023年第4期4895-4900,共6页纳米研究（英文版）

基　　金：supported by the Australian Research Council Discovery Project(No.DP190101008);Future Fellowship(No.FT190100058);the UNSW Scientia Program.H.B.L.acknowledges the University International Postgraduate Award(UIPA)PhD Scholarship from UNSW Sydney.

摘　　要：Layered materials are particularly attractive for supercapacitors because of their unique physical,electrical and chemical properties.Here,we demonstrate a facile and scalable electrochemical deposition method for wafer-scale synthesis of quasilayered tungstate-doped polypyrrole films(named TALPy)with controllable thickness and size.The as-prepared TALPy film exhibits a high gravimetric density and excellent volumetric capacitance,exceeding many high-performing carbon-and polymerbased film electrodes.Based on combined results of ex-situ X-ray diffraction(XRD),Raman and X-ray photoelectron spectroscopy(XPS),it is determined that TALPy stores charge through an ion intercalation process accompanied by change in oxidation states of polypyrrole backbone,which is referred as intercalation pseudocapacitance.All these results suggest the great promise of electrochemical deposition as a scalable and controllable bottom-up approach for synthesizing quasi-layered conductive organic-inorganic hybrid films for electrochemical energy storage applications with high volumetric performance.

关 键 词：electrochemical deposition conductive polymer POLYPYRROLE organic-inorganic hybrid SUPERCAPACITOR intercalation pseudocapacitance 

分 类 号：O63[理学—高分子化学]