Method of discharging a nickel-metal hydride battery
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H01M-002/16
H01M-010/34
H01M-010/44
출원번호
US-0189177
(2011-07-22)
등록번호
US-8722221
(2014-05-13)
발명자
/ 주소
Joshi, Ashok V.
Gordon, John Howard
Bhavaraju, Sai
Watkins, John Joseph
출원인 / 주소
Ceramatec, Inc.
대리인 / 주소
Fonda, David
인용정보
피인용 횟수 :
0인용 특허 :
75
초록▼
A method for discharging a nickel-metal hydride storage battery comprising a positive electrode containing nickel hydroxide, a negative electrode containing a hydrogen absorbing alloy, an alkaline electrolyte, and an alkali conducting separator provided between the positive electrode and the negativ
A method for discharging a nickel-metal hydride storage battery comprising a positive electrode containing nickel hydroxide, a negative electrode containing a hydrogen absorbing alloy, an alkaline electrolyte, and an alkali conducting separator provided between the positive electrode and the negative electrode. The alkali conducting separator may be a solid alkali metal ion super ion conducting material, wherein the alkali metal is Na, K, or Li.
대표청구항▼
1. A method of discharging a nickel-metal hydride battery having a positive electrode containing nickel hydroxide, a negative electrode containing a hydrogen storage alloy, an alkaline electrolyte, and a separator comprising a substantially non-porous alkali ion conducting material, comprising the s
1. A method of discharging a nickel-metal hydride battery having a positive electrode containing nickel hydroxide, a negative electrode containing a hydrogen storage alloy, an alkaline electrolyte, and a separator comprising a substantially non-porous alkali ion conducting material, comprising the steps of: generating an electric potential between the positive and negative electrodes due in part to the following reaction occurring at the positive electrode: NiOOH+H2O+Me++e−→Ni(OH)2+MeOH and due in part to the following reaction occurring at the negative electrode: MHab+MeOH→M+H2O+e−+Me+ where M is a hydrogen absorbing alloy, Hab is absorbed hydrogen, and Me is an alkali metal comprising one or more of Na, K or Li; and conducting Me+ ions across the alkali ion conducting separator from the negative electrode to the positive electrode. 2. The method of discharging a nickel-metal hydride battery according to claim 1, wherein the separator comprises a solid alkali metal ion super ion conducting material, wherein the alkali metal is Na, K, or Li. 3. The method of discharging a nickel-metal hydride battery according to claim 1, wherein the separator comprises a material comprising said Me and having the formula Me1+xZr2SixP3−xO12 where 0≦x≦3. 4. The method of discharging a nickel-metal hydride battery according to claim 1, wherein the separator comprises a material having the formula Na1+xZr2SixP3−xO12 where 0≦x≦3. 5. The method of discharging a nickel-metal hydride battery according to claim 1, wherein the separator comprises a material comprising said Me and having the formula Me5RESi4O12 where RE is Y, Nd, Dy, or Sm, or any mixture thereof. 6. The method of discharging a nickel-metal hydride battery according to claim 1, wherein the separator comprises a non-stoichiometric alkali-deficient material comprising said Me and having the formula (Me5RESi4O12)1−δ(RE2O3.2SiO2)δ, where Me is Na, K, or Li, where RE is Nd, Dy, or Sm, or any mixture thereof and where δ is the measure of deviation from stoichiometry. 7. The method of discharging a nickel-metal hydride battery according to claim 1, wherein over discharging generates hydrogen at the positive electrode which is directed through a one way check valve to the negative electrode which reduces the hydrogen.
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