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Development of Activated Carbon Electrode for Advanced Electric Double-layer Capacitor

Article of Honda R&D Technical Review Vol.15 No.1

Summary

An electrode has been developed for the electric double-layer capacitor utilized in the Honda FCX fuel cell vehicle. Control of the property of the pores of the activated carbon which is the main material and efforts to increase electrode density have enabled the achievement of a capacitance per unit volume of 17.6F/ cm3, while optimization of the electric conductive adhesive has brought surface resistivity to 6.7Ω•cm2. Excellent durability has been achieved by controlling residual organic impurities in the production process. As a result, the capacitor cell in which the electrode is utilized has a capacitance of 1 350F and an internal resistance of 2.5mΩ, is highly durable, and was judged suitable for use in the Honda FCX.

Author (organization or company)

Manabu IWAIDA(Wako Research Center)、Shigeki OYAMA(Wako Research Center)、Kenichi MURAKAMI(Wako Research Center)、Eisuke KOMAZAWA(Wako Research Center)

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