| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Research on Heat-resistant Phenolic Resin-based Activated Carbon for Supercapacitor Electrodes |
| SHENG Rui1,2,†, TANG Tingting1,2,†, TIAN Min1,2, YUAN Shuhui1,2, ZHANG Su1,2,*, FAN Zhuangjun3,*
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1 State Key Laboratory of Chemistry and Utilization of Carbon-based Energy Resources, Xinjiang University, Urumqi 830046, China
2 College of Chemistry, Xinjiang University, Urumqi 830046, China
3 School of Materials Science and Engineering, China University of Petroleum, Qingdao 266580, Shangdong, China |
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Abstract Activated carbon is widely used for supercapacitor electrode material due to its large specific surface area and low cost. However, precursors often need to be pre-carbonized/oxidized to improve the stability in the preparation of activated carbon. Thus, the high preparation cost and process complexity inhibits the practical application. Herein, we proposed a one-step chemical activation method to prepare activated carbon with high specific surface area and conductivity using a highly cross-linked phenolic resin as the precursor. At the optimized KOH to carbon mass ratio of 3:1, the specific surface area of the activated carbon was as high as 2 656 m2·g-1. When used as the electrode materials for supercapacitors, it showed a high capacitance of 305.5 F·g-1 at 1 A·g-1 and an outstanding rate performance of 63.8% capacitance retention at 50 A·g-1 in 6 mol·L-1 KOH electrolyte, which were much higher than the commercial activated carbon. In addition, it still remains good capacitance, rate performance and cycle stability at high electrode mass loadings, showing great potential for practical application.
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Published: 25 February 2023
Online: 2023-03-02
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| Fund:National Natural Science Foundation of China (52062046, 51702275, 51972342, 51872056), the Natural Science Foundation of Xinjiang Autonomous Region (2020D01C019), Taishan Scholar Project of Shandong Province (ts20190922), and Key Basic Research Project of Natural Science Foundation of Shandong Province (ZR2019ZD51). |
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2023, Vol. 37 
