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    Molten Salt Self-Template Synthesis Strategy of Oxygen-Rich Porous Carbon Cathodes for Zinc Ion Hybrid Capacitors.

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    Type
    Article
    Authors
    Zhao, Lei
    Jian, Wenbin
    Zhu, Jiahao
    Zhang, Xiaoshan
    Wen, Fuwang
    Fei, Xing
    Chen, Liheng cc
    Huang, Si
    Yin, Jian cc
    Chodankar, Nilesh R cc
    Qiu, Xueqing
    Zhang, Wenli cc
    KAUST Department
    Physical Science and Engineering (PSE) Division
    Material Science and Engineering Program
    Date
    2022-09-16
    Embargo End Date
    2023-09-16
    Permanent link to this record
    http://hdl.handle.net/10754/681570
    
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    Abstract
    Porous carbon materials are widely used in capacitive energy storage devices because of their chemical stability, low cost, and controllable textures. Molten salt self-template methods are powerful and sustainable synthesis strategies for preparing porous carbons with tunable pore textures and surface chemistries. Herein, we propose a self-template synthesis strategy for preparing oxygen-rich porous carbons (ORC) by directly carbonizing potassium chloroacetate (ClCH2COOK) as the single carbon source. The potassium chloride salts generated in the carbonization play the roles of the template and etchant agent in the pore formation process. The as-prepared ORC samples feature abundant mesopores (average pore sizes of 1.95–2.19 nm and mesopore ratio of 36.4%), high specific surface areas (1410–1886 m2 g–1), and high oxygen doping levels (4.3–8.2 atom %). The zinc ion hybrid capacitors with an ORC cathode exhibited an ultrahigh capacitance of 308 F g–1 at 0.5 A g–1 and a high energy density of 136.5 Wh kg–1 at a power density of 570 W kg–1. Density functional theory demonstrates that oxygen-containing functional groups are conducive to the adsorption of Zn ions. Our work proposes a general synthesis methodology for the synthesis of oxygen-rich porous carbons for a variety of electrochemical energy storage devices.
    Citation
    Zhao, L., Jian, W., Zhu, J., Zhang, X., Wen, F., Fei, X., Chen, L., Huang, S., Yin, J., Chodankar, N. R., Qiu, X., & Zhang, W. (2022). Molten Salt Self-Template Synthesis Strategy of Oxygen-Rich Porous Carbon Cathodes for Zinc Ion Hybrid Capacitors. ACS Applied Materials & Interfaces. https://doi.org/10.1021/acsami.2c13886
    Sponsors
    The authors acknowledge the financial support from the National Natural Science Foundation of China (22108044), the Research and Development Program in Key Fields of Guangdong Province (2020B1111380002), the Basic Research and Applicable Basic Research in Guangzhou City (202201010290), and the financial support from the Guangdong Provincial Key Laboratory of Plant Resources Biorefinery (2021GDKLPRB07)
    Publisher
    American Chemical Society (ACS)
    Journal
    ACS applied materials & interfaces
    DOI
    10.1021/acsami.2c13886
    PubMed ID
    36112058
    Additional Links
    https://pubs.acs.org/doi/10.1021/acsami.2c13886
    ae974a485f413a2113503eed53cd6c53
    10.1021/acsami.2c13886
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Material Science and Engineering Program

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