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Facile Preparation of h‐WO 3 /Carbon Cloth Nanocomposite and Its Electrochemical Properties for Supercapacitors
Author(s) -
Wang Ting,
Liu Hui,
Li Junqi,
Munir Hafiz Akif
Publication year - 2020
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202001733
Subject(s) - supercapacitor , materials science , electrode , nanocomposite , electrochemistry , horizontal scan rate , annealing (glass) , nanotechnology , electrolyte , carbon fibers , hydrothermal circulation , capacitance , chemical engineering , current density , composite number , composite material , cyclic voltammetry , chemistry , physics , quantum mechanics , engineering
Electrode active materials play a key role in electrochemical performance of supercapacitors, thus researches on the electrode active materials with better characteristics is significative to develop the actual application of supercapacitors. Here, a new hierarchical architecture composed of hexagonal phase WO 3 have been successfully prepared on carbon cloth (h‐WO 3 /CC) through a facile and effective two‐step method: hydrothermal approach and a post‐annealing process. For three electrode system tests, the composite electrode exhibits a large capacitance of up to 2918 mF cm −2 at a current density of 8 mA cm −2 , 417 F g −1 at a scan rate of 5 mV s −1 and well reliability with almost no decrease after 5000 cycles in the presence of H 2 SO 4 electrolyte. Furthermore, it can be constructed into a symmetric button capacitor for two electrode systems, which demonstrates outstanding rate capability and long cycling life. The excellent performance of h‐WO 3 /CC electrode principally attributes to the high surface area originating from the hierarchical architecture, the low internal resistance form WO 3 which grows on the carbon cloth directly and multichannel structure of hexagonal crystal.