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Three-Dimensional Graphitized Carbon Nanovesicles for High-Performance Supercapacitors Based on Ionic Liquids

Three-Dimensional Graphitized Carbon Nanovesicles for High-Performance Supercapacitors Based on Ionic Liquids

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PENG, Chengxin, Zubiao WEN, Yao QIN, Lukas SCHMIDT-MENDE, Chongzhong LI, Shihe YANG, Donglu SHI, Jinhu YANG, 2014. Three-Dimensional Graphitized Carbon Nanovesicles for High-Performance Supercapacitors Based on Ionic Liquids. In: ChemSusChem. 7(3), pp. 777-784. ISSN 1864-5631. eISSN 1864-564X. Available under: doi: 10.1002/cssc.201301193

@article{Peng2014-03Three-28958, title={Three-Dimensional Graphitized Carbon Nanovesicles for High-Performance Supercapacitors Based on Ionic Liquids}, year={2014}, doi={10.1002/cssc.201301193}, number={3}, volume={7}, issn={1864-5631}, journal={ChemSusChem}, pages={777--784}, author={Peng, Chengxin and Wen, Zubiao and Qin, Yao and Schmidt-Mende, Lukas and Li, Chongzhong and Yang, Shihe and Shi, Donglu and Yang, Jinhu} }

Shi, Donglu Three-dimensional nanoporous carbon with interconnected vesicle-like pores (1.5–4.2 nm) has been prepared through a low-cost, template-free approach from petroleum coke precursor by KOH activation. It is found that the thin pore walls are highly graphitized and consist of only three to four layers of graphene, which endows the material with an unusually high specific surface area (2933 m<sup>2</sup> g<sup>−1</sup>) and good conductivity. With such unique structural characteristics, if used as supercapacitor electrodes in ionic liquid (IL) electrolytes, the graphitized carbon nanovesicle (GCNV) material displays superior performance, such as high energy densities up to 145.9 Wh kg<sup>−1</sup> and a high combined energy-power delivery, and an energy density of 97.6 Wh kg<sup>−1</sup> can be charged in 47 s at 60 °C. This demonstrates that the energy output of the GCNV-based supercapacitors is comparable to that of batteries, and the power output is one order of magnitude higher. Moreover, the synergistic effect of the GCNVs and the IL electrolyte on the extraordinary performance of the GCNV supercapacitors has been analyzed and discussed. Qin, Yao 2014-03 Qin, Yao Shi, Donglu 2014-09-11T12:00:15Z eng Li, Chongzhong 2014-09-11T12:00:15Z Three-Dimensional Graphitized Carbon Nanovesicles for High-Performance Supercapacitors Based on Ionic Liquids Yang, Jinhu Peng, Chengxin Yang, Shihe terms-of-use Yang, Jinhu Wen, Zubiao Peng, Chengxin Wen, Zubiao Schmidt-Mende, Lukas Li, Chongzhong ChemSusChem ; 7 (2014), 3. - S.777-784 Yang, Shihe Schmidt-Mende, Lukas

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