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Nickel-metal hydride storage battery including negative electrode containing yttrium substituted hydrogen storage alloy and electrolyte solution containing sodium hydroxide
US9490477B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9490477-B2 |
| Application number | US-201314036228-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 25, 2013 |
| Priority date | Sep 27, 2012 |
| Publication date | Nov 8, 2016 |
| Grant date | Nov 8, 2016 |
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Abstract
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A nickel-metal hydride storage battery includes a negative electrode containing a hydrogen storage alloy and an electrolyte solution. The hydrogen storage alloy has a CaCu5-type crystal structure and contains at least a Ni element and a rare earth element. The rare earth element is partly substituted with an Y element, and the electrolyte solution contains NaOH in an amount of 2.0 M or more.
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What is claimed is: 1. A nickel-metal hydride storage battery comprising: a negative electrode containing a hydrogen storage alloy represented by the formula La (1-x-y) Y x Ce y Ni a Co c Mn b1 Al b2 , 0.05≦x≦0.4, 0.05≦y≦0.3, 4.35≦a≦4.55, 0.01≦c≦0.4, 0.1≦b1≦0.4 and 0.35≦b2≦0.45; and an electrolyte solution, wherein the hydrogen storage alloy has a CaCu 5 -type crystal structure, wherein the electrolyte solution contains NaOH in an amount of 2.0 M or more, and wherein the content of elements other than rare earth elements in the hydrogen storage alloy is 5.1 times or more than that of the rare earth elements in terms of the number of atoms. 2. The nickel-metal hydride storage battery according to claim claim 1 , wherein the content of elements other than the rare earth elements in the hydrogen storage alloy is 5.2 times or more than that of the rare earth elements in terms of the number of atoms. 3. The nickel-metal hydride storage battery according to claim 1 , wherein the content of elements other than the rare earth elements in the hydrogen storage alloy is 5.1 times or more and 5.4 times or less than that of the rare earth elements in terms of the number of atoms. 4. The nickel-metal hydride storage battery according to claim 1 , wherein the content of elements other than the rare earth elements in the hydrogen storage alloy is 5.2 times or more and 5.4 times or less than that of the rare earth elements in terms of the number of atoms. 5. The nickel-metal hydride storage battery according to claim 1 , wherein the electrolyte solution contains NaOH in an amount of 6.0 M or more and 8.0 M or less.
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- What does patent US9490477B2 cover?
- A nickel-metal hydride storage battery includes a negative electrode containing a hydrogen storage alloy and an electrolyte solution. The hydrogen storage alloy has a CaCu5-type crystal structure and contains at least a Ni element and a rare earth element. The rare earth element is partly substituted with an Y element, and the electrolyte solution contains NaOH in an amount of 2.0 M or more.
- Who is the assignee on this patent?
- Gs Yuasa Int Ltd
- What technology area does this patent fall under?
- Primary CPC classification H01M4/385. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Nov 08 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).