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
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.
1 Wang Y G, Song Y F, Xia Y Y. Chemical Society Reviews, 2016, 45(21), 5925. 2 Liu T Y, Zhang F, Song Y. Journal of Materials Chemistry A, 2017, 5, 17705. 3 Qin F W, Wang X L, Li Y Z. Journal of Functional Materials, 2020, 51(9), 9045(in Chinese). 秦富伟, 王相龙, 李怡招. 功能材料, 2020, 51(9), 9045. 4 Zhu J Y, Dong Y, Zhang S, et al. Acta Physico-Chimica Sinica, 2020, 36(2), 118(in Chinese). 朱家瑶, 董玥, 张苏. 物理化学学报, 2020, 36(2), 118. 5 Farma R, Deraman M, Awitdrus A, et al. Bioresour Technol, 2013, 132, 254. 6 Li P, Li H, Yang Q H, et al. Advanced Science, 2019, 6(14), 1802355. 7 Shang T, Xu Y, Li P, et al. Nano Energy, 2020, 70, 104531. 8 Sun W, Lipka S M, Swartz C, et al. Carbon, 2016, 103, 181. 9 Aravind D, Hegde G. RSC Advances, 2015, 5(107), 88339. 10 Faraji S, Ani F N. Renewable and Sustainable Energy Reviews, 2015, 42, 823. 11 Chen Y, Zhu Y C, Wang Z C, et al. Advances in Colloid and Interface Science, 2011, 163(1), 39. 12 Qing Y, Jiang Y T, Zhang S, et al. Journal of Materials Chemistry A, 2019, 7, 6021. 13 Lozano-Castelló D, Lillo-Ródenas M A, Cazorla-Amorós D, et al. Carbon, 2001, 39(5), 741. 14 Tian W, Gao Q, Tan Y, et al. Journal of Materials Chemistry A, 2015, 3, 5656. 15 Qin F F, Tian X D, Guo Z Y, et al. ACS Sustainable Chemistry & Engineering, 2018, 6(11), 15708. 16 Qu W H, Guo Y B, Shen W Z, et al. Journal of Physical Chemistry C, 2016, 120(28), 15105. 17 Cakal G O, Yuecel H, Gueruez A G. Journal of Analytical & Applied Pyrolysis, 2007, 80(1), 262. 18 Wang K, Jiang J G, Sun R F. Applied Mechanics & Materials, 2014, 521, 654. 19 Song Y, Li K X, Yang C L, et al. Petrochemical Technology, 2002, 31(6), 431. (in Chinese). 宋燕, 李开喜, 杨常玲, 等. 石油化工, 2002, 31(6), 431. 20 Liu Y D, Gao F, Zhang Y M, et al. Petrochemical Technology & Application, 2012, 30(1), 93. (in Chinese). 刘银东, 高飞, 张艳梅, 等. 石化技术与应用, 2012, 30(1), 93. 21 Wang C H, Wen W C, Yao B Y, et al. Advanced Powder Technology the Internation Journal of the Society of Powder Technology Japan, 2016, 27(4), 1387. 22 Zhao M Z, Jing J L, Wang X F, et al. International Journal of Adhesion & Adhesives, 2016, 64, 163. 23 Bafekrpour E, Yang C, Natali M, et al. Composites Part A Applied Science & Manufacturing, 2013, 54, 124. 24 Wen Y H, Cao G P, Cheng J, et al. Journal of the Electrochemical Society, 2005, 152(9), A1770. 25 Cai T W, Min Z, Ren D Y, et al. Journal of Power Sources, 2013, 231, 197. 26 Teng H, Wang S C. Carbon, 2000, 38(6), 817. 27 Chen Z Q, Liu H B, He Y D, et al. Engineering Plastics Application, 2006, 34(11), 56. (in Chinese). 陈智琴, 刘洪波, 何月德, 等. 工程塑料应用, 2006, 34(11), 56. 28 Guo Y J, Hu L H, Zhang B F, et al. The Korean Journal of Chemical Engineering, 2018, 35(1), 298. 29 Tian W H, Zhu J Y, Dong Y, et al. Carbon, 2020, 161, 89. 30 Zhang S, Zhu J Y, Qing Y, et al. Materials Today Energy, 2017, 6, 36. 31 Zhang W, Cao Z, Wang W, et al. Angewandte Chemie, 2020, 132(11). 32 Zhao J, Zhu J Y, Li Y T, et al. ACS Applied Materials & Interfaces, 2020, 12(10), 11669. 33 Zhu J, Zhang S, Wang L X, et al. Carbon, 2018, 129, 54. 34 Barros E B, Demir N S, Filho A, et al. Physical Review B Condensed Matter, 2005, 71(16), 5422. 35 Bichat M P, Raymundo-PinEro E, Béguin F, et al. Carbon, 2010, 48(15), 4351. 36 Khomenko V, Raymundo-Pinero E, Béguin F, et al. Journal of Power Sources, 2006, 153(1), 183. 37 Wang J G, Liu H Z, Sun H H, et al. Carbon, 2017, 10, 084. 38 Xue H R, Wang T, Zhao J Q, et al, Carbon, 2016, 104, 10. 39 Zhang S, Li Y T, Song H H, et al. Scientific Reports, 2016, 6, 19292. 40 Zhang S, Li Y T, Kang Y, et al. Carbon, 2016, 108, 461. 41 Dong Y, Zhang S, Du X, et al. Advanced Functional Materials, 2019, 29(24), 1901127. 42 Jiang Y T, Li J, Jiang Z M, et al. Carbon, 2021, 175, 281. 43 Wang X L, Li Y Z, Yang C, et al. International Journal of Energy Research, 2020, 45(3), 4782. 44 Guo N N, Li M, Sun X K, et al. Green Chemistry, 2017, 19, 2595. 45 Zhang D D, Zhao J H, Feng C, et al. Journal of Power Sources, 2017, 342, 363. 46 Yong W, Ru Y, Min L, et al. Industrial Crops & Products, 2015, 65, 216. 47 Pang J, Zhang W F, Zhang H, et al. Carbon, 2018, 132, 280. 48 Xing W, Huang C, Zhuo S. Carbon, 2009, 47(7), 1715. 49 Zheng Z Y, Gao Q M, et al. Journal of Power Sources, 2011, 196(3), 1615. 50 Xu Y X, Lin Z Y, Huang X Q, et al. ACS Nano, 2013, 7(5), 4042.