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Hierarchically Divacancy Defect Building Dual‐Activated Porous Carbon Fibers for High‐Performance Energy‐Storage Devices
Author(s) -
Wang Qing,
Liu Fangyan,
Jin Zeyuan,
Qiao Xiaoru,
Huang Haichao,
Chu Xiang,
Xiong Da,
Zhang Haitao,
Liu Yan,
Yang Weiqing
Publication year - 2020
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.202002580
Subject(s) - materials science , supercapacitor , energy storage , carbon fibers , renewable energy , biomass (ecology) , power density , nanotechnology , activated carbon , environmentally friendly , chemical engineering , electrode , adsorption , composite number , composite material , capacitance , power (physics) , organic chemistry , electrical engineering , chemistry , physics , oceanography , quantum mechanics , geology , engineering , ecology , biology
Renewable and environmentally friendly biomass‐based carbon electrode materials naturally possess fast ion transport, high adsorption, and excellent chemical stability for high‐performance energy‐storage devices. However, intelligently building the effectively biomass‐transferred carbon materials for the requirement of high energy density is still a big challenge to date. Here, a hierarchically divacancy defect building platform is reported for effectively biomass‐transferred and highly interconnected 3D dual‐activated porous carbon fibers (DACFs) based on the internal−external dual‐activation function of the pre‐embedded KOH and CO 2 molecular. This uniquely interconnected frameworks not only fully provide the abundant active sites for ion interaction, but also efficiently guarantee the substantial accommodation for ion storage. Based on this, the as‐prepared DACFs‐based supercapacitors deliver a high energy density of 61.3 Wh kg −1 at a power density of 875 W kg −1 in the EMIMBF 4 ionic liquid. This work not only provides a simple and efficient technique to enhance the energy density of carbon materials, but also probably promotes its additional application in environmental remediation.