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    Method and system for multiple carbon precursors for enhanced battery electrode robustness
    22.
    发明授权
    Method and system for multiple carbon precursors for enhanced battery electrode robustness 有权

    公开(公告)号：US11631851B2

    公开(公告)日：2023-04-18

    申请号：US17095343

    申请日：2020-11-11

    申请人： Enevate Corporation

    发明人： Younes Ansari ,  Giulia Canton ,  Frederic Bonhomme ,  Benjamin Park

    IPC分类号： H01M4/583 ,  H01M4/04 ,  H01M4/36 ,  H01M4/13 ,  H01M4/62 ,  H01M4/66 ,  H01M4/587 ,  C01B32/00 ,  H01M4/38

    摘要： Systems and methods for multiple carbon precursors for enhanced battery electrode robustness may include an electrode having an active material, the active material including two or more carbon precursor materials, wherein the carbon precursor materials have different pyrolysis temperatures. A battery may include the electrode. The carbon precursor materials may include polyimide (PI) and polyamide-imide (PAI). The active material may be pyrolyzed at a temperature such that a first carbon precursor material is partially pyrolyzed and a second carbon precursor material is completely pyrolyzed. The carbon precursor materials may include two or more of PI, PAI, carboxymethyl cellulose (CMC), styrene-butadiene rubber (SBR), polyacrylonitrile (PAN), and sodium alginate. The active material may include silicon constituting at least 50% of weight of a formed anode after pyrolysis. The active material may include silicon constituting up to 97% of weight of a formed electrode after pyrolysis.

    METHOD AND SYSTEM FOR WATER BASED PHENOLIC BINDERS FOR SILICON-DOMINANT ANODES
    24.
    发明申请
    METHOD AND SYSTEM FOR WATER BASED PHENOLIC BINDERS FOR SILICON-DOMINANT ANODES 有权

    公开(公告)号：US20220013782A1

    公开(公告)日：2022-01-13

    申请号：US17339666

    申请日：2021-06-04

    申请人： Enevate Corporation

    发明人： Sanjaya D. Perera ,  Liwen Ji ,  Younes Ansari ,  Benjamin Park

    IPC分类号： H01M4/62 ,  H01M4/134 ,  H01M4/1395 ,  H01M4/66 ,  H01M4/04 ,  H01M10/0525 ,  H01M4/38

    摘要： Systems and methods for water based phenolic binders for silicon-dominant anodes may include an electrode coating layer on a current collector, where the electrode coating layer is formed from silicon and a pyrolyzed water-based phenolic binder. The water-based phenolic binder may include phenolic/resol type polymers crosslinked with poly(methyl vinyl ether-alt-maleic anhydride), poly(methyl vinyl ether-alt-maleic acid), and/or Poly(acrylamide-co-diallyldimethylammonium chloride) (PDADAM). The electrode coating layer may further include conductive additives. The current collector may comprise one or more of a copper, tungsten, stainless steel, and nickel foil in electrical contact with the electrode coating layer. The electrode coating layer may include more than 70% silicon. The electrode may be in electrical and physical contact with an electrolyte, where the electrolyte includes a liquid, solid, or gel. The battery electrode may be in a lithium ion battery.

    METHOD AND SYSTEM FOR CARBON COMPOSITIONS AS CONDUCTIVE ADDITIVES FOR DENSE AND CONDUCTIVE CATHODES
    25.
    发明申请
    METHOD AND SYSTEM FOR CARBON COMPOSITIONS AS CONDUCTIVE ADDITIVES FOR DENSE AND CONDUCTIVE CATHODES 有权

    公开(公告)号：US20210194011A1

    公开(公告)日：2021-06-24

    申请号：US16722442

    申请日：2019-12-20

    申请人： Enevate Corporation

    发明人： Younes Ansari ,  Jeremy Chang ,  Benjamin Park

    IPC分类号： H01M4/66 ,  H01M10/0562 ,  H01M10/0525 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0566 ,  H01M4/134

    摘要： Systems and methods for carbon compositions as conductive additives for dense and conductive cathodes may include a cathode, an electrolyte, and a cathode active material. The active material may comprise an anode, an electrolyte, and a cathode comprising an active material. The active material may comprise 0D conductive carbon particles with nanoscale structure in three dimensions, and 1D conductive carbon particles with nanoscale structure in two dimensions, where the 1D carbon particles have a diameter of less than 120 nm and a surface area of 30 m2/g. The 0D and 1D particles may comprise between 1% and 10% of the active material. The 1D conductive carbon particles may comprise carbon nanotubes, carbon nanofibers, and/or vapor grown carbon fibers. The cathode active material may comprise nickel cobalt aluminum oxide (NCA), nickel cobalt manganese oxide, lithium iron phosphate, lithium iron phosphate, lithium cobalt oxide, lithium manganese oxide, or mixtures and combinations thereof.

    USE OF PERFORATED ELECTRODES IN SILICON-DOMINANT ANODE CELLS
    26.
    发明申请
    USE OF PERFORATED ELECTRODES IN SILICON-DOMINANT ANODE CELLS 有权

    公开(公告)号：US20210143400A1

    公开(公告)日：2021-05-13

    申请号：US16903900

    申请日：2020-06-17

    申请人： Enevate Corporation

    发明人： Younes Ansari ,  Ambica Nair ,  Benjamin Park

    IPC分类号： H01M4/134 ,  H01M10/0525 ,  H01M10/0585 ,  H01M4/36 ,  H01M4/38 ,  H01M4/74

    摘要： Systems and methods for use of perforated anodes in silicon-dominant anode cells may include a cathode, an electrolyte, and an anode, where the cathode and anode each comprise an active material on a current collector. Both of the current collector and active material may be perforated. For example, the current collector may be perforated and/or both the current collector and active material may be perforated. The battery may comprise a stack of anodes and cathodes. Each cathode of the stack may be perforated and/or each anode of the stack may be perforated. Each cathode of the stack may comprise two layers of active material on each side of the cathode where a first of the two layers of active material may be for prelithiation of anodes of the battery. A second of the two layers may be for lithium cycling of the battery.

    Method And System For Carbon Compositions As Conductive Additives For Silicon Dominant Anodes
    28.
    发明申请
    Method And System For Carbon Compositions As Conductive Additives For Silicon Dominant Anodes 有权

    公开(公告)号：US20210066722A1

    公开(公告)日：2021-03-04

    申请号：US16557765

    申请日：2019-08-30

    申请人： Enevate Corporation

    发明人： Younes Ansari ,  Rahul Kamath ,  Benjamin Park ,  Jill Renee Pestana

    IPC分类号： H01M4/62 ,  H01M4/134 ,  H01M4/1395 ,  H01M4/38 ,  H01M4/04 ,  H01M10/0525 ,  H01M10/058

    摘要： Systems and methods for carbon compositions as conductive additives for silicon dominant anodes may include a cathode, an electrolyte, and an anode active material. The active material may include 0D conductive carbon particles with nanoscale structure in three dimensions, 1D conductive carbon particles with nanoscale structure in two dimensions, and 2D conductive carbon particles with nanoscale structure in one dimension. The carbon particles may be between 1% and 40% of the active material. The anode active material may comprise between 20% to 95% silicon or between 50% to 95% silicon. The 0D conductive carbon particles may have a diameter of 50 nm or less. The 1D conductive carbon particles may comprise nanotubes, nanofibers, and/or vapor grown fibers. The 1D conductive carbon particles may have an aspect ratio of 20 or greater. The 2D conductive carbon particles may have a length in each of two dimensions between 1 and 30 μm.