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公开(公告)号：US20220025502A1
公开(公告)日：2022-01-27
申请号：US16938037
申请日：2020-07-24
摘要： A dry process for coating Ni-rich cathode powder with cubic LLZO powder prepared by flame spray pyrolysis.
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公开(公告)号：US11777156B2
公开(公告)日：2023-10-03
申请号：US17149859
申请日：2021-01-15
发明人： Albert L. Lipson
IPC分类号： H01M10/00 , H01M10/54 , H01M10/0525 , H01M10/0569 , H01M10/0562
CPC分类号： H01M10/54 , H01M10/0525 , H01M10/0562 , H01M10/0569 , H01M2300/008 , H01M2300/0028
摘要： A method for recovering a lithium electrolyte salt from spent batteries comprises first extracting electrolyte from shredded batteries (e.g., spent batteries at the end of their useful lifetime) with an organic carbonate solvent; concentrating the extracted electrolyte in vacuo to form a solid lithium electrolyte salt that is solvated with the organic carbonate; and then extracting solvent from the solvated, solid lithium electrolyte salt with supercritical CO2 to purify the lithium electrolyte salt sufficiently for reuse in lithium batteries. In the first extraction, the organic carbonate solvent is selected based on the solubility of the lithium electrolyte salt in the solvent, as well as the volatility of the solvent to facilitate the concentration process. The supercritical CO2 is preferably held at a pressure in the range of about 1,500 to about 30,000 psi and is passed through a bed or column of the solvated salt.
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公开(公告)号：US11929502B2
公开(公告)日：2024-03-12
申请号：US18133925
申请日：2023-04-12
IPC分类号： H01M4/525 , H01M4/04 , H01M4/36 , H01M10/0525 , H01M10/0568 , H01M10/0569 , H01M50/40
CPC分类号： H01M4/525 , H01M4/0471 , H01M4/366 , H01M10/0525 , H01M10/0568 , H01M10/0569 , H01M50/40 , H01M2300/002
摘要： A stabilized lithium metal oxide cathode material comprises microparticles of lithium metal oxide in which individual particles thereof a core of lithium metal oxide and a coating of a different lithium metal oxide surrounding the core. There is an interface layer between the cores and the coatings in which there are gradients of metal ions in the direction of coating to core. The materials are made by a three stage process involving coprecipitating precursor metal hydroxide core particles at a controlled pH; coprecipitating a different metal hydroxide coating on the particles without controlling the pH; and then calcining the resulting coated precursor particles with lithium hydroxide to form the stabilized lithium metal oxide material.
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公开(公告)号：US11658298B2
公开(公告)日：2023-05-23
申请号：US16877925
申请日：2020-05-19
IPC分类号： H01M4/525 , H01M4/36 , H01M4/04 , H01M10/0525 , H01M10/0568 , H01M10/0569 , H01M50/40
CPC分类号： H01M4/525 , H01M4/0471 , H01M4/366 , H01M10/0525 , H01M10/0568 , H01M10/0569 , H01M50/40 , H01M2300/002
摘要： A stabilized lithium metal oxide cathode material comprises microparticles of lithium metal oxide in which individual particles thereof a core of lithium metal oxide and a coating of a different lithium metal oxide surrounding the core. There is an interface layer between the cores and the coatings in which there are gradients of metal ions in the direction of coating to core. The materials are made by a three stage process involving coprecipitating precursor metal hydroxide core particles at a controlled pH; coprecipitating a different metal hydroxide coating on the particles without controlling the pH; and then calcining the resulting coated precursor particles with lithium hydroxide to form the stabilized lithium metal oxide material.
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公开(公告)号：US11377364B2
公开(公告)日：2022-07-05
申请号：US16727191
申请日：2019-12-26
IPC分类号： C01G25/00 , C01G25/02 , H01M10/0562 , H01M10/0525
摘要： A process for preparing doped-lithium lanthanum zirconium oxide (doped-LLZO) is described herein. The method involves dry doping of a co-precipitated lanthanum zirconium oxide (LZO) precursor. Dry doping is a process in which a dry powdered dopant is ground and mixed with a pre-prepared co-precipitated LZO precursor and a lithium salt to provide a LLZO precursor composition, which is subsequently calcined to form a doped-LLZO. The process described herein comprises calcining a dry, powdered (e.g., micron, sub-micron or nano-powdered) mixture of a co-precipitated LZO precursor, a dopant salt or oxide, and a lithium salt under an oxygen-containing atmosphere at a temperature in the range of about 500 to about 1100° C., and recovering the doped-LLZO after calcining.
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