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Hybrid Hard-Soft Materials Matrix for Energy Storage within Flow Systems

National Renewable Energy Laboratory

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Technology Marketing Summary

Navigant’s 2016 Energy Storage for the Grid and Ancillary Services report projects that North American grid capacity will need to increase to 12,140.8 MWh in 2025 to meet demand. Energy storage systems will play a significant role in meeting the challenges of developing a future grid with expanded distributed energy resources that still provides power reliably and efficiently.

Improvements within grid-scale energy storage systems, such as redox flow batteries and hybrid energy storage materials, have drawn increased attention and research due to their promising potentials of high capacity and cycle life or high energy and density. However, redox flow batteries, despite their impressive cycle life of over 10,000 cycles and a capacity life of 10-20 years, are not widely implemented for grid storage due to their limited energy density and slow charge transfer kinetics. Additionally, hybrid energy storage materials, while promising for their high-energy and high-density potential, are severely limited for further grid-scale application due to their intrinsic material limitations. Therefore, there is an increased need for high-energy and high-power energy storage systems to meet the growing demand for grid capacity.

Description

Scientists at the National Renewable Energy Laboratory (NREL) have designed high-energy and high-power battery electrodes through hybridizing organic supercapacitors with inorganic cathode flow-battery materials. This innovative design presents a whole new approach for the hybrid matrix of flow batteries by combining organic radical polymers with Li-ion intercalation materials. Furthermore, this novel design provides possibilities for enhanced performance, including energy densities greater than 100 Wh/L, operating voltages greater than 3 V versus Li, and rapid charging and discharging rates.  

Alongside these possibilities for enhanced performance, this novel flow battery design can be coupled with a primary metal ion battery (e.g., Li-ion, Mg-ion), where the secondary flow battery can then transfer energy to and charge the primary metal ion battery. This coupling of the primary battery to NREL’s novel flow battery also circumvents the formation of a passivation layer at the metal-electrolyte layer as the battery is recharged.

Benefits
  • High Voltage
  • High Energy Density
  • Rapid charging and discharging rates
  • New hybrid matrix for flow batteries
  • Capable of being coupled with and charging a primary battery
Applications and Industries
  • Grid Energy Storage Batteries
  • Energy Storage
Patents and Patent Applications
ID Number
Title and Abstract
Primary Lab
Date
Application 20170250434
Application
20170250434
MATERIALS FOR FLOW BATTERY ENERGY STORAGE AND METHODS OF USING
The present disclosure relates to a mixture that includes a mediator having a first redox potential, a non-liquid active material having a second redox potential that is less than the first redox potential, and a cation. In addition, the non-liquid active material has a first condition that includes a first oxidation state, where the cation is intercalated within the non-liquid active material, and the non-liquid active material has a second condition that includes a second oxidation state that is higher than the first oxidation state, where the non-liquid active material is substantially free of the cation. In addition, the mediator has a first condition that includes a third oxidation state and a second condition that includes a fourth oxidation state that is higher than the third oxidation state. In addition, the non-liquid active material is capable of being reversibly cycled between its first condition and its second condition, and the mediator is capable of being reversibly cycled between its first condition and its second condition.
National Renewable Energy Laboratory 02/28/2017
Filed
Technology Status
Technology IDDevelopment StageAvailabilityPublishedLast Updated
NREL ROI 15-53, 16-25ProposedAvailable11/07/201711/07/2017

Contact NREL About This Technology

To: Erin Beaumont<erin.beaumont@nrel.gov>