期刊
NANOSCALE
卷 9, 期 40, 页码 15643-15649出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7nr05307j
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资金
- Ministry of Education, Culture, Sports, Science, and Technology of Japan [16H05967, 5288110]
- Grants-in-Aid for Scientific Research [16H05967] Funding Source: KAKEN
We propose an ideal porous structure of carbon electrodes for electric double-layer capacitors (EDLCs). The porous carbon successfully improved the gravimetric capacitance above similar to 200 F g(-1) even in an organic electrolyte by utilizing the carbon nanopore surface more effectively. High-resolution transmission electron microscopy images and X-ray diffraction patterns classified 15 different porous carbon electrodes into slit-shape and worm-like-shape, and the pore size distributions of the carbons were carefully determined applying the grand canonical Monte Carlo method to N-2 adsorption isotherms at 77 K. The ratio of pores where solvated ions and/ or desolvated ions can penetrate also has a significant effect on the EDL capacitance as well as the pore shape. The detailed study on the effect of porous morphologies on the EDLC performance indicates that a hierarchical porous structure with a worm-like shaped surface and a pore size ranging from a solvated ion to a solvent molecule is an ideal electrode structure.
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