Patents by Inventor Sanjaya D. Perera

Sanjaya D. Perera has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11909058
    Abstract: A method for formation of cylindrical and prismatic can cells may include providing a battery, where the battery includes one or more cells, with each cell including at least one silicon-dominant anode, a cathode, and a separator. The battery also includes a metal can that contains the one or more cells such that during formation a pressure between 50 kPa and 1 MPa is applied to the one or more cells. The battery may include strain absorbing materials arranged between the one or more cells and interior walls of the can. The strain absorbing materials may include foam. The strain absorbing materials may include a solid electrolyte layer. The strain absorbing materials may include PMMA, PVDF, or a combination thereof. The pressure during a formation process may be due to a thickness of the strain absorbing materials being thicker than an expansion of the one or more cells.
    Type: Grant
    Filed: January 24, 2023
    Date of Patent: February 20, 2024
    Assignee: Enevate Corporation
    Inventors: Sanjaya D. Perera, Benjamin Park
  • Publication number: 20240030401
    Abstract: Systems and methods for thermal curing of water soluble polymers for silicon dominant anodes to improve the mechanical properties of the anode and electrochemical performance of a battery are provided.
    Type: Application
    Filed: July 21, 2022
    Publication date: January 25, 2024
    Inventors: Sanjaya D. Perera, Benjamin Yong Park, Younes Ansari
  • Publication number: 20230299294
    Abstract: Systems and methods utilizing water soluble (aqueous) PAA-based polymer 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 soluble PAA-based polymer blend, wherein the water soluble PAA-based polymer blend comprises PAA and one or more additional water-soluble polymer components. The electrode coating layer may include more than 70% silicon and the anode may be in a lithium ion battery.
    Type: Application
    Filed: December 5, 2022
    Publication date: September 21, 2023
    Inventors: Sanjaya D. Perera, Benjamin Yong Park, Younes Ansari
  • Patent number: 11710829
    Abstract: 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.
    Type: Grant
    Filed: June 4, 2021
    Date of Patent: July 25, 2023
    Assignee: Enevate Corporation
    Inventors: Sanjaya D. Perera, Liwen Ji, Younes Ansari, Benjamin Park
  • Publication number: 20230124344
    Abstract: A clamping device for a multilayered battery comprising one or more electrochemical cells is provided. The clamping device can include one or more plates, guided elastic members, and/or one or more layers of an interfacial material, such as foam pads or papers, to provide distributed pressure across one or more surfaces of the multilayered battery during cell formation and/or cycling. A compression plate is employed to provide a compressive force to compress the elastic members to a predetermined length, at which the position of the elastic members can be fixed.
    Type: Application
    Filed: October 19, 2021
    Publication date: April 20, 2023
    Inventors: Sanjaya D. Perera, Xianyang Li, Eric Ibarra, Todd Tatar, Benjamin Park, Kirk Shockley
  • Patent number: 11563253
    Abstract: A method for formation of cylindrical and prismatic can cells may include providing a battery, where the battery includes one or more cells, with each cell including at least one silicon-dominant anode, a cathode, and a separator. The battery also includes a metal can that contains the one or more cells such that during formation a pressure between 50 kPa and 1 MPa is applied to the one or more cells. The battery may include strain absorbing materials arranged between the one or more cells and interior walls of the can. The strain absorbing materials may include foam. The strain absorbing materials may include a solid electrolyte layer. The strain absorbing materials may include PMMA, PVDF, or a combination thereof. The pressure during a formation process may be due to a thickness of the strain absorbing materials being thicker than an expansion of the one or more cells.
    Type: Grant
    Filed: July 15, 2021
    Date of Patent: January 24, 2023
    Assignee: Enevate Corporation
    Inventors: Sanjaya D. Perera, Benjamin Park
  • Publication number: 20230021271
    Abstract: A method for formation of cylindrical and prismatic can cells may include providing a battery, where the battery includes one or more cells, with each cell including at least one silicon-dominant anode, a cathode, and a separator. The battery also includes a metal can that contains the one or more cells such that during formation a pressure between 50 kPa and 1 MPa is applied to the one or more cells. The battery may include strain absorbing materials arranged between the one or more cells and interior walls of the can. The strain absorbing materials may include foam. The strain absorbing materials may include a solid electrolyte layer. The strain absorbing materials may include PMMA, PVDF, or a combination thereof. The pressure during a formation process may be due to a thickness of the strain absorbing materials being thicker than an expansion of the one or more cells.
    Type: Application
    Filed: July 15, 2021
    Publication date: January 19, 2023
    Inventors: Sanjaya D. Perera, Benjamin Park
  • Patent number: 11522193
    Abstract: Systems and methods utilizing water soluble (aqueous) PAA-based polymer 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 soluble PAA-based polymer blend, wherein the water soluble PAA-based polymer blend comprises PAA and one or more additional water-soluble polymer components. The electrode coating layer may include more than 70% silicon and the anode may be in a lithium ion battery.
    Type: Grant
    Filed: June 10, 2021
    Date of Patent: December 6, 2022
    Assignee: Enevate Corporation
    Inventors: Sanjaya D. Perera, Benjamin Park, Younes Ansari
  • Publication number: 20220367975
    Abstract: Systems and methods are provided for configuring cell performance using specific anode, cathode, and separator combinations. Separators with significant adhesive properties may be used in forming rechargeable cells, such as lithium-ion cells. The separator with significant adhesive properties may include an adhesive coating, applied on one or both sides of the separator, and/or adhesive material is dissolved or deposited within the separator. The separators with significant adhesive properties may also include one or more ceramic layers.
    Type: Application
    Filed: May 12, 2021
    Publication date: November 17, 2022
    Inventors: Younes Ansari, Benjamin Yong Park, Sanjaya D. Perera, Xuan-Dung Dang, Sung Won Choi
  • Publication number: 20220367847
    Abstract: A method and system for carbon-coated silicon in a pyrolyzed carbon binder electrode on copper current collectors may include providing a metal current collector; forming a non-porous carbon coating on the metal current collector; coating silicon particles with carbon; forming an active material layer on the metal current collector, where the active material layer comprises at least 50% silicon particles by weight and a carbon source; and pyrolyzing the active material layer on the metal current collector, with no silicon particles in contact with metal from the metal current collector. The metal current collector may include copper. The battery anode may include no copper-silicon eutectic. The silicon particles may range in size from 2 to 50 ?m. The active material layer may include aluminum carbide. A source for the pyrolyzed carbon may include polyimide and/or polyamide-imide. The current collector may be coated with the non-porous carbon coating using physical vapor deposition.
    Type: Application
    Filed: May 13, 2021
    Publication date: November 17, 2022
    Inventors: Benjamin Park, Jill Pestana, Ian Browne, Younes Ansari, Sanjaya D. Perera
  • Patent number: 11456457
    Abstract: Systems and methods for aromatic macrocyclic compounds (Phthalocyanines) as cathode additives for inhibition of transition metal dissolution and stable solid electrolyte interphase formation may include an anode, an electrolyte, and a cathode, where the cathode comprises an active material and a phthalocyanine additive, the additive being coordinated with different metal cationic center and functional groups. The active material may comprise one or more of: nickel cobalt aluminum oxide, nickel cobalt manganese oxide, lithium iron phosphate, lithium cobalt oxide, and lithium manganese oxide, Ni-rich layered oxides LiNi1?xMxO2 where M=Co, Mn, or Al, Li-rich xLi2MnO3(1?x)LiNiaCobMncO2, Li-rich layered oxides LiNi1+xM1?O2 where M=Co, Mn, or Ni, and spinel oxides LiNi0.5Mn1.5O4.
    Type: Grant
    Filed: March 27, 2020
    Date of Patent: September 27, 2022
    Assignee: Enevate Corporation
    Inventors: Sanjaya D. Perera, Liwen Ji, Jeremy Chang, Benjamin Park
  • Patent number: 11283068
    Abstract: Methods of preparing an electrochemically active material can include providing electrochemically active particles, coating the particles with a binder, and exposing the particles to a source of metal. The methods can also include forming metal salt on the surface of the particles from the source of metal and heating the metal salt to form metal oxide coated particles.
    Type: Grant
    Filed: December 20, 2019
    Date of Patent: March 22, 2022
    Assignee: Enevate Corporation
    Inventors: Sanjaya D. Perera, Benjamin Yong Park, Jill R. Pestana
  • Publication number: 20220013782
    Abstract: 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.
    Type: Application
    Filed: June 4, 2021
    Publication date: January 13, 2022
    Inventors: Sanjaya D. Perera, Liwen Ji, Younes Ansari, Benjamin Park
  • Publication number: 20220013768
    Abstract: Systems and methods for batteries comprising a cathode, an electrolyte, and an anode, wherein the anode is a Si-dominant anode that utilizes water-soluble maleic anhydride- and/or maleic acid-containing polymers/co-polymers, derivatives, and/or combinations (with or without additives) as binders.
    Type: Application
    Filed: August 10, 2021
    Publication date: January 13, 2022
    Inventors: Liwen Ji, Younes Ansari, Sanjaya D. Perera, Benjamin Park
  • Publication number: 20210313578
    Abstract: Systems and methods for clay minerals as cathode, silicon anode, or separator additives in lithium-ion batteries may include an anode, an electrolyte, and a cathode, where the cathode comprises an active material and a clay additive. The active material may include one or more of nickel cobalt aluminum oxide (NCA), nickel cobalt manganese oxide (NCM), NCMA, lithium iron phosphate (LFP), lithium cobalt oxide (LCO), and lithium manganese oxide (LMO), Ni-rich layered oxides LiNi1?xMxO2 where M=Co, Mn, or Al, Li-rich xLi2MnO3(1?x)LiNiaCobMncO2, Li-rich layered oxides LiNi1+xM1?xO2 where M=Co, Mn, or Ni, and spinel oxides LiNi0.5Mn1.5O4. The clay additive may include a Kaolin group clay mineral, where the Kaolin group clay mineral includes Kaolinite or Halloysite. The clay additive may comprise one or more of a Smectite group clay mineral, an Illite group clay mineral, and a Chlorite group clay material. The anode may include graphite and/or graphene.
    Type: Application
    Filed: April 1, 2020
    Publication date: October 7, 2021
    Inventors: Liwen Ji, Sanjaya D. Perera, Benjamin Park
  • Publication number: 20210305560
    Abstract: Systems and methods for aromatic macrocyclic compounds (Phthalocyanines) as cathode additives for inhibition of transition metal dissolution and stable solid electrolyte interphase formation may include an anode, an electrolyte, and a cathode, where the cathode comprises an active material and a phthalocyanine additive, the additive being coordinated with different metal cationic center and functional groups. The active material may comprise one or more of: nickel cobalt aluminum oxide, nickel cobalt manganese oxide, lithium iron phosphate, lithium cobalt oxide, and lithium manganese oxide, Ni-rich layered oxides LiNi1?xMxO2 where M=Co, Mn, or Al, Li-rich xLi2MnO3(1?x)LiNiaCobMncO2, Li-rich layered oxides LiNi1+xM1?O2 where M=Co, Mn, or Ni, and spinel oxides LiNi0.5Mn1.5O4.
    Type: Application
    Filed: March 27, 2020
    Publication date: September 30, 2021
    Inventors: Sanjaya D. Perera, Liwen Ji, Jeremy Chang, Benjamin Park
  • Patent number: 11114660
    Abstract: Systems and methods for batteries comprising a cathode, an electrolyte, and an anode, wherein the anode is a Si-dominant anode that utilizes water-soluble maleic anhydride- and/or maleic acid-containing polymers/co-polymers, derivatives, and/or combinations (with or without additives) as binders.
    Type: Grant
    Filed: July 9, 2020
    Date of Patent: September 7, 2021
    Assignee: Enevate Corporation
    Inventors: Liwen Ji, Younes Ansari, Sanjaya D. Perera, Benjamin Park
  • Publication number: 20210193993
    Abstract: Methods of preparing an electrochemically active material can include providing electrochemically active particles, coating the particles with a binder, and exposing the particles to a source of metal. The methods can also include forming metal salt on the surface of the particles from the source of metal and heating the metal salt to form metal oxide coated particles.
    Type: Application
    Filed: December 20, 2019
    Publication date: June 24, 2021
    Inventors: Sanjaya D. Perera, Benjamin Yong Park, Jill R. Pestana
  • Patent number: 11038176
    Abstract: 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.
    Type: Grant
    Filed: July 9, 2020
    Date of Patent: June 15, 2021
    Assignee: Enevate Corporation
    Inventors: Sanjaya D. Perera, Liwen Ji, Younes Ansari, Benjamin Park