High pressure type hydride secondary battery
AssigneesToyota Jidosha Kabushiki Kaisha, Hiroshima University
InventorsHaruyuki Nakanishi, Yoshitsugu Kojima, Takayuki Ichikawa, Hiroki Miyaoka
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Abstract
A hydride secondary battery includes: a pressure vessel; a positive electrode disposed in the pressure vessel; a negative electrode disposed in the pressure vessel; and hydrogen gas with which the pressure vessel is filled. The negative electrode contains a hydrogen-absorbing alloy. In a pressure-composition-temperature diagram, a desorption curve at 25° C. of the hydrogen-absorbing alloy has a plateau pressure of 0.15 MPa or more and 10 MPa or less. The hydrogen gas has a pressure equal to or higher than the plateau pressure at 25° C. of the hydrogen-absorbing alloy.
Claims7
A hydride secondary battery comprising:
- a pressure vessel;
- a positive electrode disposed in the pressure vessel;
- a negative electrode disposed in the pressure vessel;
- and
- hydrogen gas with which the pressure vessel is filled,
- wherein the negative electrode contains a hydrogen-absorbing alloy, and in a pressure-composition-temperature diagram, a desorption curve at 25° C. of the hydrogen-absorbing alloy has a plateau pressure of between 0.15 MPa or more and 10 MPa or less,
- wherein the hydrogen-absorbing alloy is
- an AB5 type alloy expressed by MmNi5-x8-y8Crx8Mny8, provided that Mm represents a mischmetal, x8 is between 0.25 or more and 0.45 or less, y8 is between 0.05 or more and 0.25 or less, and a sum of x8 and y8 is 0.5, and
- wherein the hydrogen gas has a pressure equal to or higher than the plateau pressure at 25° C. of the hydrogen-absorbing alloy, and
- wherein the mischmetal is an alloy comprising Ce and La.
Dependencies are inferred from the claim text.