Molten Salt Self-Template Synthesis Strategy of Oxygen-Rich Porous Carbon Cathodes for Zinc Ion Hybrid Capacitors.
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ArticleAuthors
Zhao, LeiJian, Wenbin
Zhu, Jiahao
Zhang, Xiaoshan
Wen, Fuwang
Fei, Xing
Chen, Liheng

Huang, Si
Yin, Jian

Chodankar, Nilesh R

Qiu, Xueqing
Zhang, Wenli

KAUST Department
Physical Science and Engineering (PSE) DivisionMaterial Science and Engineering Program
Date
2022-09-16Embargo End Date
2023-09-16Permanent link to this record
http://hdl.handle.net/10754/681570
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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.2c13886Sponsors
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)PubMed ID
36112058Additional Links
https://pubs.acs.org/doi/10.1021/acsami.2c13886ae974a485f413a2113503eed53cd6c53
10.1021/acsami.2c13886
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