High capacity prelithiation reagents and lithium-rich anode materials
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H01M-004/38
H01M-010/0525
H01M-004/36
H01M-010/052
H01M-004/02
출원번호
US-0869800
(2015-09-29)
등록번호
US-9966598
(2018-05-08)
발명자
/ 주소
Cui, Yi
Zhao, Jie
Lu, Zhenda
출원인 / 주소
The Board of Trustees of the Leland Stanford Junior University
대리인 / 주소
Foley & Lardner LLP
인용정보
피인용 횟수 :
0인용 특허 :
3
초록▼
Described here is a method for making an anode of a rechargeable battery, comprising incorporating a composition comprising LixM into the anode, wherein M is a Group 14 element. Also described here is an anode comprising a composition comprising LixM, wherein M is a Group 14 element, and a rechargea
Described here is a method for making an anode of a rechargeable battery, comprising incorporating a composition comprising LixM into the anode, wherein M is a Group 14 element. Also described here is an anode comprising a composition comprising LixM, wherein M is a Group 14 element, and a rechargeable battery comprising the anode.
대표청구항▼
1. A method for making an anode of a rechargeable battery, comprising mixing a prelithiation reagent composition and an anode material selected from the group consisting of carbon, graphite, Si, Ge, SiO, SiO2, TiO2, SnO2 and P, wherein the prelithiation reagent composition comprises nanoparticles or
1. A method for making an anode of a rechargeable battery, comprising mixing a prelithiation reagent composition and an anode material selected from the group consisting of carbon, graphite, Si, Ge, SiO, SiO2, TiO2, SnO2 and P, wherein the prelithiation reagent composition comprises nanoparticles or microparticles comprising (a) a matrix of at least one of Li2O or LiF and (b) a plurality of LixM domains embedded in the matrix,wherein M is a Group 14 element, and x is an atomic ratio of Li to M, wherein x is 5:1 or less,wherein the prelithiation reagent composition prelithiates the anode material and improves a first cycle Coulombic efficiency of the anode by at least 2%, and wherein the first cycle Coulombic efficiency of the anode is at least 90%. 2. A method for making an anode of a rechargeable battery, comprising mixing a prelithiation reagent composition and an anode material selected from the group consisting of carbon, graphite, Si, Ge, SiO, SiO2, TiO2, SnO2 and P, wherein the prelithiation reagent composition comprises nanoparticles or microparticles comprising (a) a protective coating of at least one of Li2O or LiF and (b) a LixM core encapsulated by the protective coating,wherein M is a Group 14 element, and x is an atomic ratio of Li to M, wherein x is 5:1 or less,wherein the prelithiation reagent composition prelithiates the anode material and improves a first cycle Coulombic efficiency of the anode by at least 2%, and wherein the first cycle Coulombic efficiency of the anode is at least 90%. 3. The method of claim 1 or 2, wherein the composition comprises at least one of LixC, LixSi, LixGe, or LixSn. 4. The method of claim 1 or 2, comprising mixing the prelithiation reagent composition and the anode material in at least one solvent to form a slurry, wherein the solvent has a dielectric constant of 20 or less. 5. The method of claim 1 or 2, further comprising reacting nanoparticles or microparticles of the Group 14 element or compound thereof with Li to obtain the prelithiation reagent composition comprising LixM. 6. The method of claim 1 or 2, further comprising reacting Li with nanoparticles or microparticles of at least one of graphite, Si, SiO, SiO2, Ge, GeO2, or metal silicide to obtain the prelithiation reagent composition comprising . 7. The method of claim 1 or 2, wherein x is 1:6 or greater.
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이 특허에 인용된 특허 (3)
Zhamu, Aruna; Jang, Bor Z., Method of producing prelithiated anodes for secondary lithium ion batteries.
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