Hierarchical porous activated carbon is a superior material in
manufacturing supercapacitors. However, the hierarchical porous structure is
hard to obtain from a single activation method. This work was carried out with
the anticipation of producing activated
carbon by reactivating corn flour with KOH. By employing the electrodes,
the supercapacitor demonstrated a high discharge capacitance (151.2 F·g-1 at 1 A·g-1), and the specific capacitance is with 3.7
times more capacitance than the activated
carbon only through H3PO4 activation. The mechanism of improving the
electrical performance has been discussed through performing SEM, XRD, EIS, and Raman analysis. The
hierarchical porous
References
[1]
Hao, L., Li, X.L. and Zhi, L.J. (2013) Carbonaceous Electrode Materials for Supercapacitors. Advanced Materials, 25, 3899-3904. https://doi.org/10.1002/adma.201301204
[2]
Libich, J., Maca, J., Vondrak, J., Cech, O. and Sedlarikova, M. (2018) Supercapacitors: Properties and Applications. Journal of Energy Storage, 17, 224-227. https://doi.org/10.1016/j.est.2018.03.012
[3]
Tian, M., Li, R.H., Liu, C.F., Long, D.H. and Cao, G.Z. (2019) Aqueous Al-Ion Supercapacitor with V2O5 Mesoporous Carbon Electrodes. ACS Applied Materials & Interfaces, 11, 15573-15580. https://doi.org/10.1021/acsami.9b02030
[4]
Ren, K., Liu, Z., Wei, T. and Fan, Z.J. (2021) Recent Developments of Transition Metal Compounds-Carbon Hybrid Electrodes for High Energy/Power Supercapacitors. Nano-Micro Letters, 13, Article No. 129. https://doi.org/10.1007/s40820-021-00642-2
[5]
Wei, H.G., Wang, H., Li, A., Li, H.Q., Cui, D.P., Dong, M.Y., Lin, J., Fan, J.C., Zhang, J.X., Hou, H., Shi, Y.P., Zhou, D.F. and Guo, Z.H. (2020) Advanced Porous hierarchical Activated Carbon Derived from Agricultural Wastes toward High Performance Supercapacitors. Journal of Alloys and Compounds, 820, Article ID: 153111. https://doi.org/10.1016/j.jallcom.2019.153111
[6]
Wang, K., Meng, Q.H., Zhang, Y.J., Wei, Z.X. and Miao, M.H. (2013) High-Performance Two-Ply Yarn Supercapacitors Based on Carbon Nanotubes and Polyaniline Nanowire Arrays. Advanced Materials, 25, 1494-1498. https://doi.org/10.1002/adma.201204598
[7]
Chen, Z., Yu, D., Xiong, W., Liu, P., Liu, Y. and Dai, L. (2014) Graphene-Based Nanowire Supercapacitors. Langmuir, 30, 3567-3571. https://doi.org/10.1021/la500299s
[8]
Dai, C.C., Wan, J.F., Yang, J., Qu, S.S., Jin, T.Y., Ma, F.W. and Shao, J.Q. (2018) H3PO4 Solution Hydrothermal Carbonization Combined with KOH Activation to Prepare Argy Wormwood-Based Porous Carbon for High-Performance Supercapacitors. Applied Surface Science, 444, 105-117. https://doi.org/10.1016/j.apsusc.2018.02.261
[9]
Gou, H., He, J.X., Zhao, G.H., Zhang, L., Yang, C.L. and Rao, H.H. (2019) Porous Nitrogen-Doped Carbon Networks Derived from Orange Peel for High-Performance Supercapacitors. Ionics, 25, 4371-4380. https://doi.org/10.1007/s11581-019-02992-9
[10]
Zheng, L.Z., Wang, S., Yang, Y.F., Fu, X.Q., Jiang, T.S. and Yang, J. (2019) Ammonium Nitrate-Assisted Synthesis of Nitrogen/Sulfur-Codoped Hierarchically Porous Carbons Derived from Ginkgo Leaf for Supercapacitors. ACS Omega, 4, 5904-5914. https://doi.org/10.1021/acsomega.8b03586
[11]
Panmand, R.P., Patil, P., Sethi, Y., Kadam, S.R., Kulkarni, M.V., Gosavi, S.W., Munirathnam, N.R. and Kale, B.B. (2017) Unique Perforated Graphene Derived from Bougainvillea Flowers for High-Power Supercapacitors: A Green Approach. Nanoscale, 9, 4801-4809. https://doi.org/10.1039/C7NR00583K
[12]
Liu, B., Liu, Y.J., Chen, H.B., Yang, M. and Li, H.M. (2017) Oxygen and Nitrogen Co-Doped Porous Carbon Nanosheets Derived from Perilla frutescens for High Volumetric Performance Supercapacitors. Journal of Power Sources, 341, 309-317. https://doi.org/10.1016/j.jpowsour.2016.12.022
[13]
Xiao, K., Ding, L.X., Chen, H.B., Wang, S.Q., Lu, X.H. and Wang, H.H. (2016) Nitrogen-Doped Porous Carbon Derived from Residuary Shaddock Peel: A Promising and Sustainable Anode for High Energy Density Asymmetric Supercapacitors. Journal of Materials Chemistry A, 4, 372-378. https://doi.org/10.1039/C5TA08591H
[14]
Liu, B., Chen, H.B., Gao, Y. and Li, H.M. (2016) Preparation and Capacitive Performance of Porous Carbon Materials Derived from Eulaliopsis binata. Electrochimica Acta, 189, 93-100. https://doi.org/10.1016/j.electacta.2015.12.081
[15]
Yang, S., Wang, S.L., Liu, X. and Li, L. (2019) Biomass Derived Interconnected Hierarchical Micro-Meso-Macro-Porous Carbon with Ultrahigh Capacitance for Supercapacitors. Carbon, 147, 540-549. https://doi.org/10.1016/j.carbon.2019.03.023
