Positive electrode active material and preparation method thereof, positive electrode plate, secondary battery, battery module, battery pack, and electric apparatus
US-2024429384-A1 · Dec 26, 2024 · US
Nickel metal hydride secondary battery
US12300809B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12300809-B2 |
| Application number | US-202217660387-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 22, 2022 |
| Priority date | May 28, 2021 |
| Publication date | May 13, 2025 |
| Grant date | May 13, 2025 |
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- Title
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Abstract
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A nickel metal hydride secondary battery comprises an outer can and an electrode assembly housed in the outer can together with an alkaline electrolytic solution, wherein the electrode assembly is such that a positive electrode including a positive electrode mixture and a negative electrode including a negative electrode mixture are superimposed with a separator interposed therebetween, the positive electrode mixture includes nickel hydroxide forming a solid solution with zinc as a positive electrode active material and zinc oxide as a positive electrode additive, the negative electrode mixture includes hydrogen absorbing alloy particles and a negative electrode additive, the negative electrode additive is a composite in which yttrium fluoride is supported on carbon black, and a surface of the hydrogen absorbing alloy particles is partially coated with the composite.
First claim
Opening claim text (preview).
What is claimed is: 1. A nickel metal hydride secondary battery comprising a container and an electrode assembly housed in the container together with an alkaline electrolytic solution, wherein: the electrode assembly is such that a positive electrode including a positive electrode mixture and a negative electrode including a negative electrode mixture are superimposed with a separator interposed therebetween; the positive electrode mixture includes nickel hydroxide forming a solid solution with zinc as a positive electrode active material and zinc oxide as a positive electrode additive; the negative electrode mixture includes hydrogen absorbing alloy particles and a negative electrode additive; the negative electrode additive is a composite in which yttrium fluoride is supported on carbon black; and a surface of the hydrogen absorbing alloy particles is partially coated with the composite. 2. The nickel metal hydride secondary battery according to claim 1 , wherein: the zinc forms a solid solution at a concentration of 3.5 parts by mass or more and 4.5 parts by mass or less with respect to 100 parts by mass of the nickel hydroxide; the zinc oxide is added at a concentration of 0.5 parts by mass or more and 1.0 parts by mass or less with respect to 100 parts by mass of the positive electrode active material; and the yttrium fluoride accounts for 0.1 parts by mass or more and 0.2 parts by mass or less with respect to 100 parts by mass of the hydrogen absorbing alloy.
Assignees
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Classifications
Positive electrodes · CPC title
Negative electrodes · CPC title
Nickel accumulators (H01M10/34 takes precedence) · CPC title
Carbon or graphite · CPC title
Energy storage using batteries · CPC title
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- What does patent US12300809B2 cover?
- A nickel metal hydride secondary battery comprises an outer can and an electrode assembly housed in the outer can together with an alkaline electrolytic solution, wherein the electrode assembly is such that a positive electrode including a positive electrode mixture and a negative electrode including a negative electrode mixture are superimposed with a separator interposed therebetween, the pos…
- Who is the assignee on this patent?
- Fdk Corp
- What technology area does this patent fall under?
- Primary CPC classification H01M4/366. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue May 13 2025 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).