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公开(公告)号：US20250062341A1
公开(公告)日：2025-02-20
申请号：US18940387
申请日：2024-11-07
Applicant: Ascend Elements, Inc.
Inventor： Bohang Song , Eric Gratz , Yadong Liu , Dhiren Mistry , Jiyong Shin , Martha Monzon
Abstract: In a battery recycling process, a recycling stream including charge material metals from exhausted Li-ion batteries is aggregated or otherwise comminuted to generate recycled battery charge material having comparable or improved cycle life as well as recycled charge material precursor having fewer cracking defects using doping substances in both a coprecipitation phase and a sintering phase of the recycling sequence. Prior to coprecipitation of a cathode material precursor, a leach solution of comingled charge material metals is produced, the ratio of the charge material metals is adjusted based on recycled battery specifications, and a relatively small quantity of a first dopant is added. The doped precursor, a lithium salt, and a second dopant are combined and sintered to form a doped cathode material having a single crystal morphology and a higher tap density than the doped cathode precursor.
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Patent Agency Ranking
公开(公告)号：US20250054964A1
公开(公告)日：2025-02-13
申请号：US18230938
申请日：2023-08-07
Applicant: Ascend Elements, Inc.
Inventor： Yadong Liu , Eric Gratz , Haixia Deng , Dhiren Mistry , Anil Parmar , Martha Monzon
Abstract: A Li-ion cathode material is prepared by a multi-stage lithiation process that separates a total amount of lithium called for by the recycled battery to be used in a series of sintering stages. A leaching, ratio adjustment and coprecipitation sequence forms a cathode precursor having a predetermined ratio of metallic elements from a comingled recycling stream of Li-ion batteries. The precursor is sintered with a lithium salt in a sequence of stages, each having a portion of the total lithium quantity, for a predetermined duration and temperature. The initial sintering stage tends to define the crystallinity of the resulting active cathode material and has a particle size determined at least in part by the portion of lithium at each stage.
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公开(公告)号：US20250051877A1
公开(公告)日：2025-02-13
申请号：US18231953
申请日：2023-08-09
Applicant: Ascend Elements, Inc.
Inventor： Yadong Liu , Eric Gratz , Haixia Deng , Dhiren Mistry , Anil Parmar , Martha Monzon
Abstract: A curing process for cathode material alleviates surface defects on particles of the cathode material for improving battery performance. Heat treating a granular form of the cathode material in a flow of an oxygen-containing gas removes surface defects on the cathode material particles that have been mechanically deagglomerated. This results in significant improvement in both the rate of charge/discharge and the number of recharge cycles.
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公开(公告)号：US20240313283A1
公开(公告)日：2024-09-19
申请号：US18120786
申请日：2023-03-13
Applicant: Ascend Elements, Inc.
Inventor： Yadong Liu , Haixia Deng , Eric Gratz , Dhiren Mistry , Anil Parmar
CPC classification number: H01M10/54 , C01G53/50 , C01P2002/54 , C01P2004/03 , C01P2006/42
Abstract: A battery recycling process aggregates a recycling stream including charge material metals from exhausted Li-ion batteries and generates recycled battery charge material having comparable or improved cycle life as well as recycled charge material precursor having fewer cracking defects using doping substances in a coprecipitation phase in the recycling sequence. In a coprecipitation process, a solution of comingled charge material metals is produced, the ratio of the charge material metals is adjusted based on recycled battery specifications, and a relatively small quantity of a doping salt is added.
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公开(公告)号：US20240313212A1
公开(公告)日：2024-09-19
申请号：US18120776
申请日：2023-03-13
Applicant: Ascend Elements, Inc.
Inventor： Yadong Liu , Haixia Deng , Eric Gratz , Dhiren Mistry , Anil Parmar
IPC: H01M4/525 , H01M10/0525 , H01M10/54
CPC classification number: H01M4/525 , H01M10/0525 , H01M10/54 , H01M2004/021
Abstract: A battery recycling process aggregates a recycling stream including charge material metals from exhausted Li-ion batteries and generates recycled battery charge material having comparable or improved cycle life as well as recycled charge material precursor having fewer cracking defects using doping substances in a coprecipitation phase in the recycling sequence. In a coprecipitation process, a solution of comingled charge material metals is produced, the ratio of the charge material metals is adjusted based on recycled battery specifications, and a relatively small quantity of a doping salt is added.
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公开(公告)号：US20240287645A1
公开(公告)日：2024-08-29
申请号：US18113312
申请日：2023-02-23
Applicant: Ascend Elements, Inc.
Inventor： Yadong Liu , Haixia Deng , Eric Gratz , Dhiren Mistry , Anil Parmar
Abstract: A recycling process for Lithium-ion (Li-ion) batteries includes a selective leach of charge material metals followed by impurity control for effecting microstructures such as a pore volume and surface area for optimal structures and charge performance. Particle characteristics having a favorable effect on performance correlate with soluble impurities in a recycling leach solution formed from spent charge material in a battery recycling stream. Spent batteries yield a black mass of agitated, comingled cathode material, anode material and current collectors. Leaching of the black mass yields a recycling solution of charge material metals and impurities. Selective adjustment of these impurities through adding and/or separating soluble ions in the solution drives formation of internal voids, surface area and pore volume in the resulting cathode material.
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