Fluorinated carbon composite cathode for a high-energy lithium battery
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H01B-001/06
H01M-004/583
H01M-004/62
H01M-010/052
H01B-001/00
H01B-001/12
H01B-001/24
출원번호
US-0206895
(2011-08-10)
등록번호
US-8961833
(2015-02-24)
발명자
/ 주소
Zhang, Shengshui
Foster, Donald L.
Wolfenstine, Jeffery
Read, Jeffery A.
출원인 / 주소
The United States of America as represented by the Secretary of the Army
대리인 / 주소
Spevack, Avrom David
인용정보
피인용 횟수 :
0인용 특허 :
9
초록▼
A lithium/fluorinated carbon (Li/CFx) battery having a composite cathode including an electroactive cathode material, a non-electroactive additive, a conductive agent, and a binder. The electroactive cathode material is a single fluorinated carbon having a general formula of CFx, whereby x is an ave
A lithium/fluorinated carbon (Li/CFx) battery having a composite cathode including an electroactive cathode material, a non-electroactive additive, a conductive agent, and a binder. The electroactive cathode material is a single fluorinated carbon having a general formula of CFx, whereby x is an averaged value ranging from about 0.5 to about 1.2. The non-electroactive additive is at least one or a mixture of two or more oxides selected from the group comprising Mg, B, Al, Si, Cu, Zn, Y, Ti, Zr, Fe, Co, or Ni. The conductive agent is selected from the group comprising carbon, metals, and mixtures thereof. Finally, the binder is an amorphous polymer selected from the group comprising fluorinated polymers, ethylene-propylene-diene (EPDM) rubbers, styrene butadiene rubbers (SBR), poly (acrylonitrile-methyl methacrylate), carboxymethyl celluloses (CMC), and polyvinyl alcohol (PVA). Also, a method of reducing the initial voltage drop of a lithium/fluorinated carbon (Li/CFx) battery by providing a composite cathode which includes an electroactive cathode material having a general formula of CFx, whereby x is an averaged value ranging from about 0.5 to about 1.2, a non-electroactive additive, a conductive agent, and a binder.
대표청구항▼
1. A composite cathode comprising: an electroactive cathode material of a single fluorinated carbon having a general formula of CFx, whereby x is an averaged value of from about 0.5 to about 1.2;a non-electroactive additive containing at least one oxide selected from the group consisting of Mg, B, A
1. A composite cathode comprising: an electroactive cathode material of a single fluorinated carbon having a general formula of CFx, whereby x is an averaged value of from about 0.5 to about 1.2;a non-electroactive additive containing at least one oxide selected from the group consisting of Mg, B, Al, Si, Zn, Y, Ti, Zr, Fe, Co, and Ni;a conductive agent selected from the group consisting of carbon, graphite, metals, and mixtures thereof;a binder of an amorphous polymer selected from the group consisting of fluorinated polymers, ethylene-propylene-diene (EPDM) rubbers, styrene butadiene rubbers (SBR), poly (acrylonitdle-methyl methacrylate), carboxymethyl celluaoses (CMC), and poayvinyl alcohol (PVA);wherein the non-electroactive additive is present in a percentage, by weight, ranging about 1% to about 10% of the total weight of the electroactive cathode material, the non-electroactive additive, the conductive agent, and the amorphous polymer binder; andwherein the composite cathode is for a lithium/fluorinated carbon (Li/CFx) battery. 2. The composite cathode of claim 1, wherein the carbon in the electroactive cathode material CFx selected from the group consisting of cokes, carbon fibers, natural graphite, synthetic graphite and carbon blacks. 3. The composite cathode of claim 1, wherein the electroactive cathode material is present in a percentage, by weight, ranging about 60% to about 95% of the total weight of the electroactive cathode material, the non-electroactive additive, the conductive agent, and the amorphous polymer binder. 4. The composite cathode of claim 1, wherein the electroactive cathode material is present in a percentage, by weight, ranging about 70% to about 90% of the total weight of the electroactive cathode material, the non-electroactive additive, the conductive agent, and the amorphous polymer binder. 5. The composite cathode of claim 1, wherein the conductive agent is present in a percentage, by weight, ranging about 5% to about 15% of the total weight of the electroactive cathode material, the non-electroactive additive, the conductive agent, and the amorphous polymer binder. 6. The composite cathode of claim 1, wherein the binder is present in a percentage, by weight, ranging about 1% to about 10% of the total weight of the electroactive cathode material, the non-electroactive additive, the conductive agent, and the amorphous polymer binder. 7. The composite cathode of claim 1, wherein the non-electroactive additive contains at least two oxides selected from the group consisting of Mg, B, Al, Si, Zn, Y, Ti, Zr, Fe, Co, and Ni. 8. A method of reducing the initial voltage drop of a lithium/fluorinated carbon (Li/CFx) battery comprising: providing an electroactive cathode material according to claim 1 present in a percentage, by weight, ranging about 60% to about 95%;providing a non-electroactive additive present in a percentage, by weight, ranging about 1% to about 10%;providing a conductive agent present in a percentage, by weight, ranging about 5% to about 15%; andproviding a binder present in a percentage, by weight, ranging from about 1% to about 10%. 9. The method of claim 8, wherein the electroactive cathode material is a single fluorinated carbon having a formula of CFx, whereby x is an averaged value ranging from about 0.5 to about 1.2. 10. The method of claim 8, wherein the non-electroactive additive is at least one oxide of an element selected from the group consisting of Mg, B, Al Si, Cu, Zn, Y, Ti, Zr, Fe, Co, and Ni. 11. The method of claim 10, wherein the non-electroactive additive contains at least two oxides of elements selected from the group consisting of Mg, B, Al Si, Cu, Zn, Y, Ti, Zr, Fe, Co, and Ni. 12. The method of claim 8, wherein the conductive agent is selected from the group consisting of carbon, graphite, metals and mixtures thereof. 13. The method of claim 8, wherein the binder is an amorphous polymer selected from the group consisting of fluorinated polymers, ethylene-propylene-diene (EPDM) rubbers, styrene butadiene rubbers (SBR), poly (acrylonitrHe-methyl methacrylate), carboxymethyl cellunoses (CMC), and poJyvinyl alcohol (PVA). 14. A lithium/fluorinated carbon (Li/CFx) battery having a composite cathode comprising: an electroactive cathode material of a single fluorinated carbon having a general formula of CFx, whereby x is an averaged value ranging from about 0.5 to about 1.2;a non-electroactive additive containing at least one oxide comprising an element selected from the group consisting of Mg, B, Al, Si, Cu, Zn, Y, Ti, Zr, Fe, Co, and Ni;a conductive agent selected from the group comprising carbon, graphite, metals, and mixtures thereof;a binder of an amorphous polymer selected from the group comprising fluorinated polymers, ethylene-propylene-diene (EPDM) rubbers, styrene butadiene rubbers (SBR), poly (acrylonitrile-methyl methacrylate), carboxymethyl celluloses (CMC), and polyvinyl alcohol (PVA); and wherein the non-electroactive additive is present in a percentage, by weight, ranging about 1% to about 10%. 15. The battery of claim 14 having a composite cathode, wherein the electroactive cathode material is present in a percentage, by weight, ranging about 60% to about 95%. 16. The battery of claim 14 having a composite cathode, wherein the conductive agent is present in a percentage, by weight, ranging about 5% to about 15%. 17. The battery of claim 14 having a composite cathode, wherein the binder is present in a percentage, by weight, ranging about 1% to about 10%. 18. The battery of claim 14 having a composite cathode, wherein the non-electroactive additive contains at least two oxides of elements selected from the group consisting of Mg, B, Al, Si, Cu, Zn, Y, Ti, Zr, Fe, Co, and Ni.
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