Patents by Inventor Zuqin Liu

Zuqin Liu 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).

  • Publication number: 20200274156
    Abstract: Provided herein are nanostructures for lithium ion battery electrodes and methods of fabrication. In some embodiments, a nanostructure template coated with a silicon coating is provided. The silicon coating may include a non-conformal, more porous layer and a conformal, denser layer on the non-conformal, more porous layer. In some embodiments, two different deposition processes, e.g., a PECVD layer to deposit the non-conformal layer and a thermal CVD process to deposit the conformal layer, are used. Anodes including the nanostructures have longer cycle lifetimes than anodes made using either a PECVD or thermal CVD method alone.
    Type: Application
    Filed: May 13, 2020
    Publication date: August 27, 2020
    Inventors: Weijie Wang, Zuqin Liu, Song Han, Jonathan Bornstein, Constantin Ionel Stefan
  • Patent number: 10707484
    Abstract: Provided herein are nanostructures for lithium ion battery electrodes and methods of fabrication. In some embodiments, a nanostructure template coated with a silicon coating is provided. The silicon coating may include a non-conformal, more porous layer and a conformal, denser layer on the non-conformal, more porous layer. In some embodiments, two different deposition processes, e.g., a PECVD layer to deposit the non-conformal layer and a thermal CVD process to deposit the conformal layer, are used. Anodes including the nanostructures have longer cycle lifetimes than anodes made using either a PECVD or thermal CVD method alone.
    Type: Grant
    Filed: February 2, 2018
    Date of Patent: July 7, 2020
    Assignee: Amprius, Inc.
    Inventors: Weijie Wang, Zuqin Liu, Song Han, Jonathan Bornstein, Constantin Ionel Stefan
  • Publication number: 20200161635
    Abstract: An anode active material comprises a silicon-carbon secondary particle comprising a composite having an exterior conformal carbon coating and formed of type I primary particles. Each type I primary particle comprises a core particle of interconnected silicon, the interconnected silicon formed of nano-sized silicon particles each connected to at least one other particle, inner pores internal to the core particle and defined by the interconnected silicon, an internal carbon coating on internal wall surfaces of the inner pores and a conformal carbon coating on the core particle.
    Type: Application
    Filed: November 18, 2019
    Publication date: May 21, 2020
    Inventors: Zuqin Liu, Richard M. Mank, Hyea Kim, Hongli Dai, Sunho Kang, Ji-Guang Zhang, Ran Yi, Qiuyan Li, Xiaolin Li, Wu Xu, Rajankumar L. Patel, Hyung-Seok Lim, Chongmin Wang, Langli Luo, Yang He
  • Publication number: 20190273252
    Abstract: Provided are examples of electrochemically active electrode materials, electrodes using such materials, and methods of manufacturing such electrodes. Electrochemically active electrode materials may include a high surface area template containing a metal silicide and a layer of high capacity active material deposited over the template. The template may serve as a mechanical support for the active material and/or an electrical conductor between the active material and, for example, a substrate. Due to the high surface area of the template, even a thin layer of the active material can provide sufficient active material loading and corresponding battery capacity. As such, a thickness of the layer may be maintained below the fracture threshold of the active material used and preserve its structural integrity during battery cycling.
    Type: Application
    Filed: January 31, 2019
    Publication date: September 5, 2019
    Inventors: Ghyrn E. Loveness, William S. Delhagen, Rainer Fasching, Song Han, Zuqin Liu
  • Publication number: 20190088939
    Abstract: Provided herein are nanostructures for lithium ion battery electrodes and methods of fabrication. In some embodiments, a nanostructure template coated with a silicon coating is provided. The silicon coating may include a non-conformal, more porous layer and a conformal, denser layer on the non-conformal, more porous layer. In some embodiments, two different deposition processes, e.g., a PECVD layer to deposit the non-conformal layer and a thermal CVD process to deposit the conformal layer, are used. Anodes including the nanostructures have longer cycle lifetimes than anodes made using either a PECVD or thermal CVD method alone.
    Type: Application
    Filed: February 2, 2018
    Publication date: March 21, 2019
    Inventors: Weijie Wang, Zuqin Liu, Song Han, Jonathan Bornstein, Constantin Ionel Stefan
  • Patent number: 10230101
    Abstract: Provided are examples of electrochemically active electrode materials, electrodes using such materials, and methods of manufacturing such electrodes. Electrochemically active electrode materials may include a high surface area template containing a metal silicide and a layer of high capacity active material deposited over the template. The template may serve as a mechanical support for the active material and/or an electrical conductor between the active material and, for example, a substrate. Due to the high surface area of the template, even a thin layer of the active material can provide sufficient active material loading and corresponding battery capacity. As such, a thickness of the layer may be maintained below the fracture threshold of the active material used and preserve its structural integrity during battery cycling.
    Type: Grant
    Filed: September 18, 2015
    Date of Patent: March 12, 2019
    Assignee: Amprius, Inc.
    Inventors: Ghyrn E. Loveness, William S. Delhagen, Rainer Fasching, Song Han, Zuqin Liu
  • Patent number: 10096817
    Abstract: Provided herein are novel template electrode materials and structures for lithium ion cells. Related methods are also provided. According to various embodiments, an electrode can include a nanostructured template, an electrochemically active material layer coating the template, and a first intermediate layer between the nanostructured template and the electrochemically active material layer. In one arrangement, the nanostructured template includes silicide nanowires. The electrochemically active material may be any of silicon, tin, germanium, carbon, metal hydrides, silicides, phosphides, and nitrides. The first intermediate layer may facilitate adhesion between the nanostructured template and the electrochemically active material layer, electronic conductivity within the electrode, and/or stress relaxation between the nanostructured template and the electrochemically active material layer.
    Type: Grant
    Filed: July 2, 2012
    Date of Patent: October 9, 2018
    Assignee: Amprius, Inc.
    Inventors: Ghyrn E. Loveness, Song Han, Zuqin Liu
  • Publication number: 20180090755
    Abstract: Provided are battery electrode structures that maintain high mass loadings (i.e., large amounts per unit area) of high capacity active materials in the electrodes without deteriorating their cycling performance. These mass loading levels correspond to capacities per electrode unit area that are suitable for commercial electrodes even though the active materials are kept thin and generally below their fracture limits. A battery electrode structure may include multiple template layers. An initial template layer may include nanostructures attached to a substrate and have a controlled density. This initial layer may be formed using a controlled thickness source material layer provided, for example, on a substantially inert substrate. Additional one or more template layers are then formed over the initial layer resulting in a multilayer template structure with specific characteristics, such as a surface area, thickness, and porosity.
    Type: Application
    Filed: September 1, 2017
    Publication date: March 29, 2018
    Inventors: Zuqin Liu, Song Han, Ghyrn E. Loveness
  • Patent number: 9923201
    Abstract: Provided herein are nanostructures for lithium ion battery electrodes and methods of fabrication. In some embodiments, a nanostructure template coated with a silicon coating is provided. The silicon coating may include a non-conformal, more porous layer and a conformal, denser layer on the non-conformal, more porous layer. In some embodiments, two different deposition processes, e.g., a PECVD layer to deposit the non-conformal layer and a thermal CVD process to deposit the conformal layer, are used. Anodes including the nanostructures have longer cycle lifetimes than anodes made using either a PECVD or thermal CVD method alone.
    Type: Grant
    Filed: May 12, 2015
    Date of Patent: March 20, 2018
    Assignee: Amprius, Inc.
    Inventors: Weijie Wang, Zuqin Liu, Song Han, Jonathan Bornstein, Constantin Ionel Stefan
  • Publication number: 20170338464
    Abstract: Provided are novel electrode material composite structures containing high capacity active materials formed into porous base structures. The structures also include shells that encapsulate these porous base structures. During lithiation of the active material, the shell mechanically constrains the porous base structure. The shell allows lithium ions to pass through but prevents electrolyte solvents from interacting with the encapsulated active material. In certain embodiments, the shell contains carbon, while the porous base structure contains silicon. Although silicon tends to swell during lithiation, the porosity of the base structure and/or void spaces inside the shell helps to accommodate this additional volume within the shell without breaking it or substantially increasing the overall size of the composite structure.
    Type: Application
    Filed: May 30, 2017
    Publication date: November 23, 2017
    Inventors: Rainer J. Fasching, Zuqin Liu, Song Han, Ghyrn E. Loveness, Constantin I. Stefan
  • Patent number: 9780365
    Abstract: Provided are battery electrode structures that maintain high mass loadings (i.e., large amounts per unit area) of high capacity active materials in the electrodes without deteriorating their cycling performance. These mass loading levels correspond to capacities per electrode unit area that are suitable for commercial electrodes even though the active materials are kept thin and generally below their fracture limits. A battery electrode structure may include multiple template layers. An initial template layer may include nanostructures attached to a substrate and have a controlled density. This initial layer may be formed using a controlled thickness source material layer provided, for example, on a substantially inert substrate. Additional one or more template layers are then formed over the initial layer resulting in a multilayer template structure with specific characteristics, such as a surface area, thickness, and porosity.
    Type: Grant
    Filed: October 20, 2011
    Date of Patent: October 3, 2017
    Assignee: Amprius, Inc.
    Inventors: Zuqin Liu, Song Han, Ghyrn E. Loveness
  • Patent number: 9698410
    Abstract: Provided are novel electrode material composite structures containing high capacity active materials formed into porous base structures. The structures also include shells that encapsulate these porous base structures. During lithiation of the active material, the shell mechanically constrains the porous base structure. The shell allows lithium ions to pass through but prevents electrolyte solvents from interacting with the encapsulated active material. In certain embodiments, the shell contains carbon, while the porous base structure contains silicon. Although silicon tends to swell during lithiation, the porosity of the base structure and/or void spaces inside the shell helps to accommodate this additional volume within the shell without breaking it or substantially increasing the overall size of the composite structure.
    Type: Grant
    Filed: October 30, 2015
    Date of Patent: July 4, 2017
    Assignee: Amprius, Inc.
    Inventors: Rainer J. Fasching, Zuqin Liu, Song Han, Ghyrn E. Loveness, Constantin I. Stefan
  • Patent number: 9692056
    Abstract: Batteries having improved current collection are provided. In some implementations, an electrode structure of a battery may include an active material and two or more current collectors in electrical communication with the active material. In some implementations, an electrode structure of a battery may include two or more current collector layers. According to various implementations, the electrode structure may or may not include a current collector substrate. In some implementations, a battery anode includes a current collector substrate in electronic contact with nanostructured active material. In order to ensure that electronic communication between the active material and the current collector substrate is maintained throughout the life of the battery, a second electronically conductive path is provided in the form of a current collector layer over the nanostructured active material. The additional layer is thin and electronically conductive, and does not interfere adversely with battery operation.
    Type: Grant
    Filed: April 15, 2013
    Date of Patent: June 27, 2017
    Assignee: Amprius, Inc.
    Inventors: Zuqin Liu, Song Han
  • Publication number: 20170098819
    Abstract: Provided herein are novel template electrode materials and structures for lithium ion cells. Related methods are also provided. According to various embodiments, an electrode can include a nanostructured template, an electrochemically active material layer coating the template, and a first intermediate layer between the nanostructured template and the electrochemically active material layer. In one arrangement, the nanostructured template includes silicide nanowires. The electrochemically active material may be any of silicon, tin, germanium, carbon, metal hydrides, silicides, phosphides, and nitrides. The first intermediate layer may facilitate adhesion between the nanostructured template and the electrochemically active material layer, electronic conductivity within the electrode, and/or stress relaxation between the nanostructured template and the electrochemically active material layer.
    Type: Application
    Filed: July 2, 2012
    Publication date: April 6, 2017
    Applicant: AMPRIUS INC.
    Inventors: Ghyrn E. Loveness, Song Han, Zuqin Liu
  • Publication number: 20160064725
    Abstract: Provided are novel electrode material composite structures containing high capacity active materials formed into porous base structures. The structures also include shells that encapsulate these porous base structures. During lithiation of the active material, the shell mechanically constrains the porous base structure. The shell allows lithium ions to pass through but prevents electrolyte solvents from interacting with the encapsulated active material. In certain embodiments, the shell contains carbon, while the porous base structure contains silicon. Although silicon tends to swell during lithiation, the porosity of the base structure and/or void spaces inside the shell helps to accommodate this additional volume within the shell without breaking it or substantially increasing the overall size of the composite structure.
    Type: Application
    Filed: October 30, 2015
    Publication date: March 3, 2016
    Inventors: Rainer J. Fasching, Zuqin Liu, Song Han, Ghyrn E. Loveness, Constantin I. Stefan
  • Publication number: 20160013483
    Abstract: Provided are examples of electrochemically active electrode materials, electrodes using such materials, and methods of manufacturing such electrodes. Electrochemically active electrode materials may include a high surface area template containing a metal silicide and a layer of high capacity active material deposited over the template. The template may serve as a mechanical support for the active material and/or an electrical conductor between the active material and, for example, a substrate. Due to the high surface area of the template, even a thin layer of the active material can provide sufficient active material loading and corresponding battery capacity. As such, a thickness of the layer may be maintained below the fracture threshold of the active material used and preserve its structural integrity during battery cycling.
    Type: Application
    Filed: September 18, 2015
    Publication date: January 14, 2016
    Inventors: Ghyrn E. Loveness, William S. Delhagen, Rainer Fasching, Song Han, Zuqin Liu
  • Patent number: 9209456
    Abstract: Provided are novel electrode material composite structures containing high capacity active materials formed into porous base structures. The structures also include shells that encapsulate these porous base structures. During lithiation of the active material, the shell mechanically constrains the porous base structure. The shell allows lithium ions to pass through but prevents electrolyte solvents from interacting with the encapsulated active material. In certain embodiments, the shell contains carbon, while the porous base structure contains silicon. Although silicon tends to swell during lithiation, the porosity of the base structure and/or void spaces inside the shell helps to accommodate this additional volume within the shell without breaking it or substantially increasing the overall size of the composite structure.
    Type: Grant
    Filed: October 20, 2011
    Date of Patent: December 8, 2015
    Assignee: Amprius, Inc.
    Inventors: Rainer J. Fasching, Zuqin Liu, Song Han, Ghyrn E. Loveness, Constantin I. Stefan
  • Publication number: 20150325852
    Abstract: Provided herein are nanostructures for lithium ion battery electrodes and methods of fabrication. In some embodiments, a nanostructure template coated with a silicon coating is provided. The silicon coating may include a non-conformal, more porous layer and a conformal, denser layer on the non-conformal, more porous layer. In some embodiments, two different deposition processes, e.g., a PECVD layer to deposit the non-conformal layer and a thermal CVD process to deposit the conformal layer, are used. Anodes including the nanostructures have longer cycle lifetimes than anodes made using either a PECVD or thermal CVD method alone.
    Type: Application
    Filed: May 12, 2015
    Publication date: November 12, 2015
    Inventors: Weijie Wang, Zuqin Liu, Song Han, Jonathan Bornstein, Constantin Ionel Stefan
  • Patent number: 9172094
    Abstract: Provided are examples of electrochemically active electrode materials, electrodes using such materials, and methods of manufacturing such electrodes. Electrochemically active electrode materials may include a high surface area template containing a metal silicide and a layer of high capacity active material deposited over the template. The template may serve as a mechanical support for the active material and/or an electrical conductor between the active material and, for example, a substrate. Due to the high surface area of the template, even a thin layer of the active material can provide sufficient active material loading and corresponding battery capacity. As such, a thickness of the layer may be maintained below the fracture threshold of the active material used and preserve its structural integrity during battery cycling.
    Type: Grant
    Filed: June 10, 2013
    Date of Patent: October 27, 2015
    Assignee: Amprius, Inc.
    Inventors: Ghyrn E. Loveness, William S. DelHagen, Rainer Fasching, Song Han, Zuqin Liu
  • Publication number: 20130344383
    Abstract: Provided are examples of electrochemically active electrode materials, electrodes using such materials, and methods of manufacturing such electrodes. Electrochemically active electrode materials may include a high surface area template containing a metal silicide and a layer of high capacity active material deposited over the template. The template may serve as a mechanical support for the active material and/or an electrical conductor between the active material and, for example, a substrate. Due to the high surface area of the template, even a thin layer of the active material can provide sufficient active material loading and corresponding battery capacity. As such, a thickness of the layer may be maintained below the fracture threshold of the active material used and preserve its structural integrity during battery cycling.
    Type: Application
    Filed: June 10, 2013
    Publication date: December 26, 2013
    Applicant: Amprius, Inc.
    Inventors: Ghyrn E. Loveness, William S. DelHagen, Rainer Fasching, Song Han, Zuqin Liu