Effective Surface Area Control of Single-Wall Carbon Nanohorns for Supercapacitor Application
- Effective Surface Area Control of Single-Wall Carbon Nanohorns for Supercapacitor Application
- 정환중; 김용중; 정용채; Hirofumi Kanoh; Katsumi Kaneko; 양철민
- SWNH; Supercapacitor
- Issue Date
- International Conference on Advanced Capacitors
- Supercapacitors have attracted much attention as power supply devices for
electric vehicles and hybrid electric vehicles. Because of high specific surface area
(SSA) and excellent electrical conductivity of nanostructured carbons, they have
been actively studied as hopeful electrode materials for energy storage. Several
parameters of nanostructured carbons are recognized as key factors in terms of their
application as supercapacitor electrode materials: SSA, pore size distribution,
surface chemical state, and electrical conductivity. In particular, the pore size and
electrical conductivity of the electrode materials are important parameters from the
viewpoint of ion diffusivity and effective electrode surface area which are closely
related to enhancement in the specific capacitance of supercapacitors.
Here, we investigated the heat-treatment effect of single-wall carbon
nanohorns (SWCNHs) on their capacitive properties of supercapacitor electrode to
elucidate the relationship between the electrical conductivity of the SWCNHs and
the electrolyte ion diffusivity. In addition, capacitance behaviors of the SWCNH
electrodes were compared for the aqueous and organic electrolytes with different
solvated ion sizes.
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