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Pore structure and the properties of electric double layer capacitor electrode of bamboo-derived activated carbon prepared by superheated steam
- Source :
- Journal of Wood Science. 64:642-649
- Publication Year :
- 2018
- Publisher :
- Springer Science and Business Media LLC, 2018.
-
Abstract
- Bamboo-derived activated carbon prepared by superheated steam (BAC) exhibited performance for utilization as an electric double layer capacitor (EDLC) electrode. Pore structure and EDLC performances were investigated by comparison with phenol resin-derived activated carbon (MSP-20), which is commercially available and often used for the purpose. The nitrogen adsorption isotherm showed that BAC had a large BET-specific surface area of 1268 g/m2 with a developed pore structure, especially of the mesopore, in comparison with MSP-20. It is considered that inherent ash in bamboo promoted activation, in addition to physical activation by superheated steam. Capacitance per electrode volume (CV) was 52 F/cm3 with BAC. Because the density of BAC is high (0.78 g/cm3) compared with that of MSP-20 (0.58 g/cm3), sufficient CV for usage was obtained, although the capacitance per electrode mass (CM) at 5 mA/cm2 itself of BAC (67 F/g) was lower than that of MSP-20 (126 F/g). With IR drop, the resistance value of BAC (9.7 Ω) was lower than that of MSP-20 (10.5 Ω). Especially, the diffusion resistance of BAC disclosed to be smaller than that of MSP-20. These results indicated that BAC produced by steam activation is a promising material with a pore structure suitable for ion transfer in EDLC.
- Subjects :
- Materials science
Diffusion
Superheated steam
food and beverages
02 engineering and technology
Electric double-layer capacitor
010402 general chemistry
021001 nanoscience & nanotechnology
complex mixtures
01 natural sciences
Capacitance
0104 chemical sciences
law.invention
Biomaterials
Adsorption
Magazine
Chemical engineering
law
Electrode
medicine
0210 nano-technology
Activated carbon
medicine.drug
Subjects
Details
- ISSN :
- 16114663 and 14350211
- Volume :
- 64
- Database :
- OpenAIRE
- Journal :
- Journal of Wood Science
- Accession number :
- edsair.doi...........9d5af9d7313440ef5c05f348beadd211