Preparation of capacitor’s electrode from sunflower seed shell |
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Authors: | Xiao LiWei Xing Shuping Zhuo Jin ZhouFeng Li Shi-Zhang QiaoGao-Qing Lu |
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Affiliation: | a School of Chemical Engineering, Shandong University of Technology, Zibo 255049, China b Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China c ARC Centre of Excellence for Functional Nanomaterials, Australian Institute for Bioengineering and Nanotechnology and School of Engineering, The University of Queensland, Brisbane, QLD 4072, Australia |
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Abstract: | Series of nanoporous carbons are prepared from sunflower seed shell (SSS) by two different strategies and used as electrode material for electrochemical double-layer capacitor (EDLC). The surface area and pore-structure of the nanoporous carbons are characterized intensively using N2 adsorption technique. The results show that the pore-structure of the carbons is closely related to activation temperature and dosage of KOH. Electrochemical measurements show that the carbons made by impregnation-activation process have better capacitive behavior and higher capacitance retention ratio at high drain current than the carbons made by carbonization-activation process, which is due to that there are abundant macroscopic pores and less interior micropore surface in the texture of the former. More importantly, the capacitive performances of these carbons are much better than ordered mesoporous carbons and commercial wood-based active carbon, thus highlighting the success of preparing high performance electrode material for EDLC from SSS. |
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Keywords: | SSS, sunflower seed shell EDLC, electrochemical double-layer capacitor BET, Brunauer-Emmett-Teller OMCs, ordered mesoporous carbons AC-X-Y, carbons made by impregnation-activation process NC-X-Y, carbons made by carbonization-activation process CV, cyclic voltammetry CAC, commercial active carbon EDL, electric double layer |
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