Positive electrode active material and preparation method thereof, secondary battery, battery module, battery pack and electrical device
US-2024387819-A1 · Nov 21, 2024 · US
Positive electrode for nonaqueous electrolyte secondary battery and nonaqueous electrolyte secondary battery using the same
US2017194628A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2017194628-A1 |
| Application number | US-201515503509-A |
| Country | US |
| Kind code | A1 |
| Filing date | Aug 25, 2015 |
| Priority date | Sep 30, 2014 |
| Publication date | Jul 6, 2017 |
| Grant date | — |
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Abstract
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It is an object to provide a positive electrode for nonaqueous electrolyte secondary batteries in which a decrease in the initial charge capacity is suppressed even when a positive electrode active material exposed to the air is used. The positive electrode for a nonaqueous electrolyte secondary battery contains a lithium transition metal oxide and is formed by mixing the lithium transition metal oxide, tungsten oxide, and a carbonate compound. The tungsten oxide is present on at least a part of a surface of the lithium transition metal oxide, and the mixed carbonate compound is present on a part of a surface of the tungsten oxide.
First claim
Opening claim text (preview).
1 . A positive electrode for a nonaqueous electrolyte secondary battery, comprising a lithium transition metal oxide, wherein the positive electrode is formed by mixing the lithium transition metal oxide, tungsten oxide, and a carbonate compound, the tungsten oxide is present on at least a part of a surface of the lithium transition metal oxide, and the mixed carbonate compound is present on a part of a surface of the tungsten oxide. 2 . The positive electrode for a nonaqueous electrolyte secondary battery according to claim 1 , wherein a content of the carbonate compound is 0.5 mass % or more and 5 mass % or less relative to the lithium transition metal oxide. 3 . The positive electrode for a nonaqueous electrolyte secondary battery according to claim 1 , wherein the carbonate compound is lithium carbonate. 4 . The positive electrode for a nonaqueous electrolyte secondary battery according to claim 3 , wherein an amount of the lithium carbonate mixed is 50 mass % or more of an amount of lithium carbonate contained in the positive electrode. 5 . The positive electrode for a nonaqueous electrolyte secondary battery according to claim 1 , wherein the tungsten oxide is WO 3 . 6 . The positive electrode for a nonaqueous electrolyte secondary battery according to claim 1 , wherein the lithium transition metal oxide is represented by general formula Li 1+x M a O 2+b (in the formula, x, a, and b satisfy x+a=1, −0.2<x≦0.2, and −0.1≦b≦0.1, and M contains at least one element selected from the group consisting of Ni, Co, Mn, and Al). 7 . The positive electrode for a nonaqueous electrolyte secondary battery according to claim 1 , comprising a phosphate compound. 8 . The positive electrode for a nonaqueous electrolyte secondary battery according to claim 7 , wherein the phosphate compound is present on a part of the surface of the tungsten oxide. 9 . The positive electrode for a nonaqueous electrolyte secondary battery according to claim 7 , wherein the phosphate compound is lithium phosphate. 10 . A nonaqueous electrolyte secondary battery comprising the positive electrode for a nonaqueous electrolyte secondary battery according to claim 1 .
Assignees
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Classifications
Positive electrodes · CPC title
as layered products · CPC title
Carbon or graphite · CPC title
of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy · CPC title
as mixtures · CPC title
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- What does patent US2017194628A1 cover?
- It is an object to provide a positive electrode for nonaqueous electrolyte secondary batteries in which a decrease in the initial charge capacity is suppressed even when a positive electrode active material exposed to the air is used. The positive electrode for a nonaqueous electrolyte secondary battery contains a lithium transition metal oxide and is formed by mixing the lithium transition met…
- Who is the assignee on this patent?
- Sanyo Electric Co
- What technology area does this patent fall under?
- Primary CPC classification H01M4/131. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Thu Jul 06 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). 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).