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| 국가/구분 | United States(US) Patent 등록 |
|---|---|
| 국제특허분류(IPC7판) |
|
| 출원번호 | US-0752779 (2010-04-01) |
| 등록번호 | US-8722246 (2014-05-13) |
| 발명자 / 주소 |
|
| 출원인 / 주소 |
|
| 대리인 / 주소 |
|
| 인용정보 | 피인용 횟수 : 0 인용 특허 : 541 |
The present invention includes compositions and methods of making cation-substituted and fluorine-substituted spinel cathode compositions by firing a LiMn2−y−zLiyMzO4 oxide with NH4HF2 at low temperatures of between about 300 and 700° C. for 2 to 8 hours and a η of more than 0 and less than about 0.
The present invention includes compositions and methods of making cation-substituted and fluorine-substituted spinel cathode compositions by firing a LiMn2−y−zLiyMzO4 oxide with NH4HF2 at low temperatures of between about 300 and 700° C. for 2 to 8 hours and a η of more than 0 and less than about 0.50, mixed two-phase compositions consisting of a spinel cathode and a layered oxide cathode, and coupling them with unmodified or surface modified graphite anodes in lithium ion cells.
1. A cathode, comprising: a LiMn2−y−zLiyMzO4−ηFη cation-substituted spinel oxide material, wherein y is from about 0 to about 0.3, z is from about 0 to about 1.0, M is a metal, and η is greater than 0 and less than about 0.5; andone or more layered oxide materials comprising Li[Ni,Mn,Co,Li]O2,wherei
1. A cathode, comprising: a LiMn2−y−zLiyMzO4−ηFη cation-substituted spinel oxide material, wherein y is from about 0 to about 0.3, z is from about 0 to about 1.0, M is a metal, and η is greater than 0 and less than about 0.5; andone or more layered oxide materials comprising Li[Ni,Mn,Co,Li]O2,wherein the one or more layered oxide materials are in contact with the cation-substituted spinel oxide material. 2. The cathode of claim 1, wherein M is selected from the group consisting of Mg, Al, V, Cr, Fe, Ti, Co, Ni, Cu, Zn, Zr, Nb, Mo, Ga, Sn and combinations thereof. 3. The cathode of claim 1, wherein the cathode comprises from about 20 wt % to about 95 wt % of the cation-substituted spinel oxide material and the cathode comprises from about 5 wt % to about 80 wt % of the one or more layered oxide materials. 4. The cathode of claim 1, wherein: the cathode comprises from about 70 wt % to about 80 wt % of the LiMn2−y−zLiyMzO4−ηFη cation-substituted spinel oxide material,the LiMn2−y−zLiyMzO4−ηFη cation-substituted spinel oxide material is selected from the group consisting of LiMn1.8Li0.1Ni0.1O3.8F0.2, LiMn1.8Li0.2O3.88F0.12, LiMn1.8Li0.2O3.79F0.21, LiMn1.8Li0.1Ti0.1O3.9F0.1, LiMn1.8Li0.1Cu0.1O3.9F0.1, LiMn1.8Li0.1Ni0.1O3.9F0.1, and combinations thereof,the cathode comprises from about 20 wt % to about 30 wt % of the one or more layered oxide materials, andthe one or more layered oxide materials are selected from the group consisting of LiCoO2, LiNi0.5Mn0.5O2, and combinations thereof. 5. The cathode of claim 1, wherein the cation-substituted spinel oxide material is selected from the group consisting of LiMn1.8Li0.2O3.88F0.12, LiMn1.8Li0.2O3.79F0.21, LiMn1.8Li0.1Ti0.1O3.9F0.1, LiMn1.8Li0.1Cu0.1O3.9F0.1, LiMn1.8Li0.1Ni0.1O3.9F0.1, LiMn1.8Li0.1Ni0.1O3.8F0.2, and combinations thereof. 6. The cathode of claim 1, wherein the one more layered oxide materials are selected from the group consisting of LiCoO2, LiNi0.5Mn0.5O2 and combinations thereof. 7. The cathode of claim 1, wherein the cathode comprises from about 20 wt % to about 95 wt % of the cation-substituted spinel oxide material. 8. The cathode of claim 1, wherein the cathode comprises from about 70 wt % to about 80 wt % of the cation-substituted spinel oxide material. 9. The cathode of claim 1, wherein the cathode comprises from about 5 wt % to about 80 wt % of the one or more layered oxide materials. 10. The cathode of claim 1, wherein the cathode comprises from 20 wt % to about 30 wt % of the one or more layered oxide materials.
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