Patents by Inventor Shrihari SANKARASUBRAMANIAN

Shrihari SANKARASUBRAMANIAN 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).

  • PH-gradient-enabled microscale bipolar interfaces for direct liquid-fuel/oxidant fuel cells
    Patent number: 11949136
    Abstract: Described herein are direct liquid fuel cells with an alkaline anodic fuel stream including a solution of liquid fuel such as alcohols, ethers, glycols or compounds of hydrazine, and an acidic cathode oxidant stream including a solution of a suitable oxidant such as hydrogen peroxide or a gas steam with 1% to 100% O2. These cells are used as primary stationary and/or mobile power sources and also function in a secondary role as range extenders when coupled with a primary power source.
    Type: Grant
    Filed: October 27, 2020
    Date of Patent: April 2, 2024
    Assignee: Washington University
    Inventors: Zhongyang Wang, Vijay K. Ramani, Shrihari Sankarasubramanian
  • Electrode-decoupled redox flow battery
    Patent number: 11894590
    Abstract: Described herein is a novel electrode-decoupled redox flow battery, a novel reinforced electrode-decoupled redox flow battery, and methods of using same to store energy. Advantages of these novel electrode-decoupled redox flow batteries include long life, excellent rate capability, and stability.
    Type: Grant
    Filed: July 7, 2021
    Date of Patent: February 6, 2024
    Assignee: Washington University
    Inventors: Shrihari Sankarasubramanian, Vijay Ramani
  • ELECTROLYZER
    Publication number: 20230416932
    Abstract: Described herein is an electrolyzer including a pyrochlore electrocatalyst with a metal deposited thereon. The electrolyzer may be a unitized regenerative fuel cell. Also described herein are methods of using the electrolyzer. Also described herein is a brine electrolyzer including a pyrochlore electrocatalyst. Also described herein are methods of using the brine electrolyzer.
    Type: Application
    Filed: September 13, 2023
    Publication date: December 28, 2023
    Inventors: Shrihari Sankarasubramanian, Pralay Gayen, Vijay Ramani, Sulay Saha
  • BRINE ELECTROLYZER
    Publication number: 20230279567
    Abstract: Described herein is a brine electrolyzer including a pyrochlore electrocatalyst. The brine may include natural or added perchlorate salts. Also described herein are methods of using the brine electrolyzer. Advantages of this brine electrolyzer include device operation at near-neutral pH, device operation without the need for a deionized water feed, and the use of selective catalysts at the anode that favor oxygen evolution and mitigate the occurrence of unwanted side reactions.
    Type: Application
    Filed: July 21, 2021
    Publication date: September 7, 2023
    Inventors: Shrihari Sankarasubramanian, Pralay Gayen, Vijay Ramani
  • Microscale-bipolar-interface-enabled pH gradients in electrochemical devices
    Patent number: 11616246
    Abstract: Among the various aspects of the present disclosure is the provision of method of inducing or providing a pH gradient in electrochemical or chemical systems. Briefly, the pH gradient is induced by use of coated particles or films with an ion exchange ionomer.
    Type: Grant
    Filed: April 9, 2019
    Date of Patent: March 28, 2023
    Assignee: Washington University
    Inventors: Vijay K. Ramani, Zhongyang Wang, Javier Parrondo, Shrihari Sankarasubramanian
  • REACTANT-TRANSPORT ENGINEERING FOR HIGH-POWER DIRECT LIQUID-FUEL/OXIDANT FUEL CELLS
    Publication number: 20220407088
    Abstract: Described herein are flow field plates comprising a flow field pattern and fuel cells comprising the flow field plates comprising a flow field pattern. The flow field plates and fuel cells are applicable to fuel cells and stacks over a range of sizes and fuel/oxidant combinations as long as the fuel and oxidant are incompressible liquids.
    Type: Application
    Filed: June 13, 2022
    Publication date: December 22, 2022
    Inventors: Shrihari Sankarasubramanian, Zhongyang Wang, Vijay K. Ramani
  • REDOX FLOW BATTERY
    Publication number: 20220059860
    Abstract: Disclosed herein is a redox flow battery (RFB). The battery generally includes: a positive electrolyte that is a first metal ion, a negative electrolyte that is a second metal ion, an ion exchange membrane positioned between the positive electrolyte and the negative electrolyte. The membrane is configured to restrict and/or prevent the passage of the first metal ion and/or the second metal ion therethrough, and is configured to maintain ionic conductivity between the positive electrolyte and the negative electrolyte.
    Type: Application
    Filed: November 8, 2021
    Publication date: February 24, 2022
    Inventors: Shrihari Sankarasubramanian, Vijay K. Ramani
  • PH-GRADIENT-ENABLED MICROSCALE BIPOLAR INTERFACES FOR DIRECT LIQUID-FUEL/OXIDANT FUEL CELLS
    Publication number: 20220052365
    Abstract: Described herein are direct liquid fuel cells with an alkaline anodic fuel stream including a solution of liquid fuel such as alcohols, ethers, glycols or compounds of hydrazine, and an acidic cathode oxidant stream including a solution of a suitable oxidant such as hydrogen peroxide or a gas steam with 1% to 100% O2. These cells are used as primary stationary and/or mobile power sources and also function in a secondary role as range extenders when coupled with a primary power source.
    Type: Application
    Filed: October 27, 2020
    Publication date: February 17, 2022
    Applicant: Washington University
    Inventors: Zhongyang Wang, Vijay K. Ramani, Shrihari Sankarasubramanian
  • ELECTRODE-DECOUPLED REDOX FLOW BATTERY
    Publication number: 20220013800
    Abstract: Described herein is a novel electrode-decoupled redox flow battery, a novel reinforced electrode-decoupled redox flow battery, and methods of using same to store energy. Advantages of these novel electrode-decoupled redox flow batteries include long life, excellent rate capability, and stability.
    Type: Application
    Filed: July 7, 2021
    Publication date: January 13, 2022
    Inventors: Shrihari Sankarasubramanian, Vijay Ramani
  • Redox flow battery
    Patent number: 11177497
    Abstract: Disclosed herein is a redox flow battery (RFB). The battery generally includes: a positive electrolyte that is a first metal ion, a negative electrolyte that is a second metal ion, an ion exchange membrane positioned between the positive electrolyte and the negative electrolyte. The membrane is configured to restrict and/or prevent the passage of the first metal ion and/or the second metal ion therethrough, and is configured to maintain ionic conductivity between the positive electrolyte and the negative electrolyte.
    Type: Grant
    Filed: March 12, 2019
    Date of Patent: November 16, 2021
    Assignee: Washington University
    Inventors: Shrihari Sankarasubramanian, Vijay K. Ramani
  • DOPED ANION EXCHANGE MEMBRANES (AEMs) FOR HIGHLY SELECTIVE SEPARATORS IN ELECTROCHEMICAL DEVICES
    Publication number: 20210299650
    Abstract: Anion exchange membranes (AEMs) for separators in electrochemical devices and methods for making same are disclosed herein. AEMs include chloromethylated SEBS triblock copolymer functionalized with TRIS cations and chloromethylated QPEK-C functionalized with TMA cations. Composite AEMs further include metal oxide fillers. Reinforced AEMs and reinforced composite AEMs further include a reinforcement material base.
    Type: Application
    Filed: July 30, 2019
    Publication date: September 30, 2021
    Applicant: Washington University
    Inventors: Zhongyang Wang, Shrihari Sankarasubramanian, Vijay K. Ramani, Yunzhu Zhang, Javier Parrondo
  • MICROSCALE-BIPOLAR-INTERFACE-ENABLED PH GRADIENTS IN ELECTROCHEMICAL DEVICES
    Publication number: 20190312293
    Abstract: Among the various aspects of the present disclosure is the provision of method of inducing or providing a pH gradient in electrochemical or chemical systems. Briefly, the pH gradient is induced by use of coated particles or films with an ion exchange ionomer.
    Type: Application
    Filed: April 9, 2019
    Publication date: October 10, 2019
    Applicant: Washington University
    Inventors: Vijay K. Ramani, Zhongyang Wang, Javier Parrondo, Shrihari Sankarasubramanian
  • REDOX FLOW BATTERY
    Publication number: 20190280323
    Abstract: Disclosed herein is a redox flow battery (RFB). The battery generally includes: a positive electrolyte that is a first metal ion, a negative electrolyte that is a second metal ion, an ion exchange membrane positioned between the positive electrolyte and the negative electrolyte. The membrane is configured to restrict and/or prevent the passage of the first metal ion and/or the second metal ion therethrough, and is configured to maintain ionic conductivity between the positive electrolyte and the negative electrolyte.
    Type: Application
    Filed: March 12, 2019
    Publication date: September 12, 2019
    Applicant: Washington University
    Inventors: Shrihari Sankarasubramanian, Vijay K. Ramani
  • Alloys as cathode materials for lithium-air batteries
    Patent number: 9799881
    Abstract: A Li-air battery is provided. The battery contains: an anode compartment containing lithium or a lithium alloy as active metal; a cathode compartment supplied with an O2 source; and a lithium ion conductive membrane separating the anode compartment from the cathode compartment. The cathode compartment contains an air electrode with a skin alloy platinum or palladium catalyst.
    Type: Grant
    Filed: April 27, 2015
    Date of Patent: October 24, 2017
    Assignees: Toyota Motor Engineering & Manufacturing North America, Inc., Illinois Institute of Technology
    Inventors: Shrihari Sankarasubramanian, Jai Prakash, Fuminori Mizuno, Nikhilendra Singh
  • ALLOYS AS CATHODE MATERIALS FOR LITHIUM-AIR BATTERIES
    Publication number: 20160315329
    Abstract: A Li-air battery is provided. The battery comprises: an anode compartment containing lithium or a lithium alloy as active metal; a cathode compartment supplied with an O2 source; and a lithium ion conductive membrane separating the anode compartment from the cathode compartment. The cathode compartment comprises an air electrode with a skin alloy platinum or palladium catalyst.
    Type: Application
    Filed: April 27, 2015
    Publication date: October 27, 2016
    Applicant: Toyota Motor Engineering & Manufacturing North America, Inc.
    Inventors: Shrihari SANKARASUBRAMANIAN, Jai PRAKASH, Fuminori MIZUNO, Nikhilendra SINGH