期刊
EUROPEAN POLYMER JOURNAL
卷 130, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.eurpolymj.2020.109678
关键词
Templated carbon xerogels; Electric double layer; Macropore-assisted electrolyte transfer; Vacuum drying; Aqueous electrolyte
资金
- Thailand Research Fund [RSA5980004]
- King Mongkut's Institute of Technology Ladkrabang Research Fund [KREF046004]
Capacitive performance of electric double layer capacitors is influenced by specific surface area, while pore structure also promotes electrolyte transfer inside a carbon electrode. Organic electrolytes require macropores, whereas aqueous electrolytes operate best using mesopores for electrolyte transfer. Templated carbon xerogels (TCXs) were prepared from resorcinol and formaldehyde with cotton fibers as a hard template containing macropores, mesopores and micropores as the carbon electrode. Results suggested that macropores ( > 50 nm) were contiguously created and connected with mesopore diameters (2-50 nm), leading to convenient ion transport inside the TCXs. Vacuum drying formed sponge-like carbon xerogels that permitted electrolyte transfer. Despite the insignificant change of porous properties, TCXs possessing sponge-like carbon xerogels showed increased capacitance values from 137 F/g to 317 F/g at 200 mA/g in a three-electrode system as a result of macropore-assisted electrolyte transfer in aqueous electrolytes.
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