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US 6,191,935 B1Granted
Electric double-layer capacitor having hard granular carbon material penetrating into the aluminum collector electrodes
AssigneesHonda Giken Kogyo Kabushiki Kaisha, JEOL Ltd.
InventorsMichio Okamura, Minoru Noguchi, Manabu Iwaida, Eisuke Komazawa, Akinori Mogami
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Abstract
An electric double-layer capacitor that is adapted for use in an electric vehicle, for example, and uses aluminum collector electrodes. A native oxide film is formed on each aluminum electrode. Hard granular carbon is made to penetrate through the oxide film into each aluminum electrode. The aluminum electrodes are connected with positive and negative polarizing electrodes, respectively, via the granular carbon, thus lowering the contact resistance.
Claims6
An electric double-layer capacitor comprising:
- a positive polarizing electrode and a negative polarizing electrode placed in an electrolyte and separated from each other by a separator, each of said polarizing electrodes consisting mainly of activated carbon producing an electric double layer;
- aluminum collector electrodes in contact with said polarizing electrodes, respectively, and acting to transfer electric charge to or from said polarizing electrodes, said aluminum collector electrodes being connected with external terminals;
- oxide films formed upon surfaces of said aluminum collector electrodes, respectively;
- and
- hard granular carbon penetrating through said oxide films into said aluminum collector electrodes.
2 more elements
Dependencies are inferred from the claim text.