Volume 8, Issue 3 1901301
Full Paper

A 3D Carbon Foam Derived from Phenol Resin via CsCl Soft-Templating Approach for High-Performance Supercapacitor

Tao Yan

Tao Yan

Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin Key Laboratory of Applied Catalysis Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072 P. R. China

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Ziyao Wan

Ziyao Wan

Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin Key Laboratory of Applied Catalysis Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072 P. R. China

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Kang Wang

Kang Wang

Chemical Engineering Research Center, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072 P. R. China

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Maocong Hu

Corresponding Author

Maocong Hu

Key Laboratory of Optoelectronic Chemical Materials and Devices, Ministry of Education, School of Chemical and Environmental Engineering, Jianghan University, Wuhan, 430056 P. R. China

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Xitao Wang

Corresponding Author

Xitao Wang

Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin Key Laboratory of Applied Catalysis Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072 P. R. China

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First published: 07 January 2020
Citations: 21

Abstract

Carbon with a 3D foam structure is synthesized by a one-step strategy using low-molecular-weight phenolic resin as the precursor and CsCl as a salt template. Their electrochemical performance as electrodes is studied for symmetric supercapacitors. The distinct effect of CsCl addition amount on morphology, pore structure, electric conductivity, and electrochemical performance is further investigated. With appropriate CsCl addition amount, 3D carbon foam is harvested with abundant micropores and mesopores with a surface area beyond 1590 m2 g−1. It is tested as an electrode in a coin-type symmetric supercapacitor with 6 m KOH and 1 m TEABF4/MeCN as the electrolyte. The 3D carbon foam electrode displays specific capacitance of 259.3 F g−1 in 6 m KOH and 127.9 F g−1 in 1 m TEABF4/MeCN at 0.5 A g−1. Notably, it exhibits high energy density of 27.7 W h kg−1 in 1 m TEABF4/MeCN. After 10 000 cycles, the specific capacitance remains at 96.9% in 6 m KOH, indicating good cycle stability. The superior performance of 3D carbon foam is attributed to larger surface area, higher electric conductivity, and unique 3D foam structure with sufficient 3D ion-accessible channels. This work develops a simple, facile method to synthesize high-performance supercapacitor electrode materials.

Conflict of Interest

The authors declare no conflict of interest.

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