Abstract
Porous carbon materials have been prepared by direct carbonization of potassium stearate in inert atmosphere without any further activation. The porous carbon materials exhibited a typical hierarchical pore size distribution, thereby rendering them the excellent supercapacitive performance. All electrochemical measurements were performed in a three-electrode system using 6 M KOH as the electrolyte. CK800 can deliver a high specific capacitance of 208 F g−1 (36.1 µF cm−2) at a current density of 0.5 A g−1. As the current density increased up to 30 A g−1, a high specific capacitance of 120 F g−1(20.8 µF cm−2) still can be maintained. 90.86 % of the specific capacitance was retained even after 5000 charge/discharge cycles at a current density of 2 A g−1.
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Acknowledgments
This study was supported by the National Natural Science Foundation of China (NSFC, No. 21364004) and the Provincial Natural Science Foundation of Gansu (No. 1506RJZA102).
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Luo, HM., Chen, H., Chen, YZ. et al. Simple synthesis of porous carbon materials for high-performance supercapacitors. J Appl Electrochem 46, 703–712 (2016). https://doi.org/10.1007/s10800-016-0958-9
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DOI: https://doi.org/10.1007/s10800-016-0958-9