Composite metal oxide, method for producing composite metal oxide, and sodium secondary battery
US-2015333363-A1 · Nov 19, 2015 · US
Mixed active material for lithium secondary battery, lithium secondary battery electrode, lithium secondary battery and power storage apparatus
US2016190551A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016190551-A1 |
| Application number | US-201414903483-A |
| Country | US |
| Kind code | A1 |
| Filing date | Jun 18, 2014 |
| Priority date | Jul 10, 2013 |
| Publication date | Jun 30, 2016 |
| Grant date | — |
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Abstract
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Provided is a mixed active material for a lithium secondary battery, which includes a lithium transition metal composite oxide having an α-NaFeO 2 structure with the transition metal (Me) including Co, Ni and Mn and the Mn/Me molar ratio being more than 0.5, and a lithium transition metal composite oxide having an α-NaFeO 2 structure with the transition metal (Me) including Co, Ni and Mn and the Mn/Me molar ratio being more than 0 and not more than 0.5, wherein the mixed active material has a specific surface area of 4.4 m 2 /g or less and a S content of 0.2 to 1.2% by mass.
First claim
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1 . A mixed active material for a lithium secondary battery, which comprises: a lithium transition metal composite oxide having an α-NaFeO 2 structure with a transition metal (Me) including Co, Ni and Mn and the Mn/Me molar ratio being more than 0.5, and a lithium transition metal composite oxide having an α-NaFeO 2 structure with a transition metal (Me) including Co, Ni and Mn and the Mn/Me molar ratio being more than 0 and not more than 0.5, wherein the mixed active material has a specific surface area of 4.4 m 2 /g or less and a S content of 0.2 to 1.2% by mass. 2 . The mixed active material for a lithium secondary battery according to claim 1 , wherein S is incorporated by acid-treating the lithium transition metal composite oxide with the transition metal (Me) including Co, Ni and Mn and the Mn/Me molar ratio being more than 0 and not more than 0.5. 3 . The mixed active material for a lithium secondary battery according to claim 1 , wherein the mixing ratio of the lithium transition metal composite oxide with the transition metal (Me) including Co, Ni and Mn and the Mn/Me molar ratio being more than 0.5 and the lithium transition metal composite oxide with the transition metal (Me) including Co, Ni and Mn and the Mn/Me molar ratio being more than 0 and not more than 0.5 is 70:30 to 95:5. 4 . The mixed active material for a lithium secondary battery according to claim 1 , wherein the mixing ratio of the lithium transition metal composite oxide with the transition metal (Me) including Co, Ni and Mn and the Mn/Me molar ratio being more than 0.5 and the lithium transition metal composite oxide with the transition metal (Me) including Co, Ni and Mn and the Mn/Me molar ratio being more than 0 and not more than 0.5 is 80:20 to 90:10. 5 . The mixed active material for a lithium secondary battery according to claim 1 , wherein the lithium transition metal composite oxide with the transition metal (Me) including Co, Ni and Mn and the Mn/Me molar ratio being more than 0.5 has a Co/Me molar ratio (molar ratio of Co to the transition metal Me) of 0.05 to 0.40. 6 . The mixed active material for a lithium secondary battery according to claim 1 , wherein the lithium transition metal composite oxide with the transition metal (Me) including Co, Ni and Mn and the Mn/Me molar ratio being more than 0.5 has a Co/Me molar ratio (molar ratio of Co to the transition metal Me) of 0.10 to 0.30. 7 . The mixed active material for a lithium secondary battery according to claim 1 , wherein the specific surface area is 4.2 m 2 /g or less. 8 . The mixed active material for a lithium secondary battery according to claim 1 , wherein the specific surface area is 3.8 m 2 /g or less. 9 . The mixed active material for a lithium secondary battery according to claim 1 , wherein the S content is 0.2 to 1.0% by mass. 10 . The mixed active material for a lithium secondary battery according to claim 1 , wherein the S content is 0.2 to 0.8% by mass. 11 . The mixed active material for a lithium secondary battery according to claim 1 , wherein the lithium transition metal composite oxide with the transition metal (Me) including Co, Ni and Mn and the Mn/Me molar ratio being more than 0.5 has the Mn/Me molar ratio of more than 0.5 and not more than 0.8. 12 . The mixed active material for a lithium secondary battery according to claim 1 , wherein the lithium transition metal composite oxide with the transition metal (Me) including Co, Ni and Mn and the Mn/Me molar ratio being more than 0.5 has the Mn/Me molar ratio of more than 0.5 and not more than 0.75. 13 . The mixed active material for a lithium secondary battery according to claim 1 , wherein the lithium transition metal composite oxide with the transition metal (Me) including Co, Ni and Mn and the Mn/Me molar ratio being more than 0.5 has a Li/Me molar ratio (molar ratio of lithium (Li) to the transition metal) of more than 1. 14 . The mixed active material for a lithium secondary battery according to claim 1 , wherein the lithium transition metal composite oxide with the transition metal (Me) including Co, Ni and Mn and the Mn/Me molar ratio being more than 0.5 has a Li/Me molar ratio (molar ratio of lithium (Li) to the transition metal) of more than 1.2. 15 . The mixed active material for a lithium secondary battery according to claim 1 , wherein the lithium transition metal composite oxide with the transition metal (Me) including Co, Ni and Mn and the Mn/Me molar ratio being more than 0.5 has a Li/Me molar ratio (molar ratio of lithium (Li) to the transition metal) of more than 1.2 and less than 1.6. 16 . The mixed active material for a lithium secondary battery according to claim 1 , wherein the lithium transition metal composite oxide with the transition metal (Me) including Co, Ni and Mn and the Mn/Me molar ratio being more than 0.5 has a Li/Me molar ratio (molar ratio of lithium (Li) to the transition metal) of not less than 1.25 and not more than 1.5. 17 . A lithium secondary battery electrode comprising the mixed active material for a lithium secondary battery according to claim 1 . 18 . A lithium secondary battery comprising the lithium secondary battery electrode according to claim 17 . 19 . A power storage apparatus in which the plurality of lithium secondary batteries according to claim 18 are assembled to construct the power storage apparatus.
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Pore diameter · CPC title
Li-accumulators · CPC title
Pore volume · CPC title
- H01M4/364Primary
as mixtures · CPC title
by peak-intensities or a ratio thereof only · CPC title
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- What does patent US2016190551A1 cover?
- Provided is a mixed active material for a lithium secondary battery, which includes a lithium transition metal composite oxide having an α-NaFeO 2 structure with the transition metal (Me) including Co, Ni and Mn and the Mn/Me molar ratio being more than 0.5, and a lithium transition metal composite oxide having an α-NaFeO 2 structure with the transition metal (Me) including Co, Ni and Mn and …
- Who is the assignee on this patent?
- Gs Yuasa Int Ltd
- What technology area does this patent fall under?
- Primary CPC classification H01M4/364. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Thu Jun 30 2016 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 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).