Device for controlling alkali storage battery
US-2016315357-A1 · Oct 27, 2016 · US
Nickel-metal hydride battery and method for producing hydrogen storage alloy
US9634324B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9634324-B2 |
| Application number | US-73449608-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 18, 2008 |
| Priority date | Nov 9, 2007 |
| Publication date | Apr 25, 2017 |
| Grant date | Apr 25, 2017 |
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Abstract
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It is an object of the present invention to improve the cycle performance in a nickel-metal hydride battery using a rare earth-Mg—Ni type alloy. The present invention provides a nickel-metal hydride battery having a negative electrode including an La—Mg—Ni based hydrogen absorbing alloy, wherein the hydrogen absorbing alloy has a crystal phase having Gd 2 Co 7 type crystal structure and contains calcium.
First claim
Opening claim text (preview).
The invention claimed is: 1. A nickel-metal hydride battery comprising a negative electrode, the negative electrode including an La—Mg—Ni based hydrogen absorbing alloy, wherein said hydrogen absorbing alloy has a crystal phase having Gd 2 Co 7 type crystal structure and said hydrogen absorbing alloy contains calcium; wherein said hydrogen absorbing alloy has a layered structure of a plurality of crystal phases layered in a c-axis direction of the crystal structure; wherein the content of the crystal phase having said Gd 2 Co 7 type crystal structure is 76% by mass or higher; wherein the content of the magnesium in said hydrogen absorbing alloy is 3.3% by atom or higher and 5.6% by atom or lower; and wherein the content of said calcium in said hydrogen absorbing alloy is 0.7% by atom or higher and 9.5% by atom or lower. 2. A nickel-metal hydride battery comprising a negative electrode, the negative electrode including an R—Mg—Ni based hydrogen absorbing alloy, wherein R comprises a rare earth element; wherein said hydrogen absorbing alloy has a crystal phase having Gd 2 Co 7 type crystal structure and said hydrogen absorbing alloy contains calcium; wherein said hydrogen absorbing alloy has a layered structure of a plurality of crystal phases layered in a c-axis direction of the crystal structure; wherein the content of the crystal phase having said Gd 2 Co 7 type crystal structure is 76% by mass or higher; wherein the content of the magnesium in said hydrogen absorbing alloy is 3.3% by atom or higher and 5.6% by atom or lower; wherein the content of said calcium in said hydrogen absorbing alloy is 0.7% by atom or higher and 9.5% by atom or lower; and wherein a number of Ni atoms is at least 3 and at most 5 times as much as a sum of the numbers of R atoms, Mg atoms, and Ca atoms.
Assignees
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Classifications
of nickel or cobalt or alloys based thereon · CPC title
Gastight metal hydride accumulators · CPC title
of the type LaNi5 · CPC title
with chromium · CPC title
based on nickel · CPC title
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- What does patent US9634324B2 cover?
- It is an object of the present invention to improve the cycle performance in a nickel-metal hydride battery using a rare earth-Mg—Ni type alloy. The present invention provides a nickel-metal hydride battery having a negative electrode including an La—Mg—Ni based hydrogen absorbing alloy, wherein the hydrogen absorbing alloy has a crystal phase having Gd 2 Co 7 type crystal structure and contai…
- Who is the assignee on this patent?
- Ozaki Tetsuya, Kanemoto Manabu, Watada Masaharu, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification H01M4/383. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Apr 25 2017 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).