Symmetric Redox Flow Batteries for Economically-Viable Grid-Scale Energy Storage

Tech ID: 30060 / UC Case 2019-165-0

Brief Description

A 5-redox state nitride-capped organometallic motif that can completely replace current redox flow batteries.

Background

Growth in renewable energy use is increasing the need for economically-viable grid-level energy storage. Redox flow batteries (RFBs) are considered a promising candidate for energy storage systems. However, despite their advantages over alternative methods, such as traditional solid-state batteries, their level of performance when compared to cost is often not justified. For example, vanadium is often considered too pricey and bromine is toxic and corrosive, making it a riskier option. 

Description

Researchers at the University of California, Santa Barbara have created a 5-redox state nitride-capped organometallic motif that can completely replace current redox flow batteries. The complex is based on a phthalocyanine framework that makes it easy to produce, has favorable physical parameters, and is extremely robust. It can be tuned to increase solubility without affecting its core electronic properties. Further, it offers excellent chemical stability and a simplified cell design. Its ability to cycle data has demonstrated its success. This technology is a rare example of a highly robust symmetric charge carrier made from a single ligand with excellent electrochemical behavior and a tunable periphery. The ability to use RFBs at a significantly lower cost make them well suited for widespread commercialization. 

Advantages

  • Fast kinetics and a symmetric electrochemical profile
  • Can be tuned to increase solubility without affecting the core electronic properties
  • Symmetric redox flow batteries can use inexpensive membranes without accumulative capacity fade
  • Can be recycled repeatedly through all 5 redox states with no apparent degradation
  • Compatible with a simple glass frit as a membrane 

Applications

  • Renewable energy
  • Grid-level energy storage systems
  • Batteries

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Inventors

  • Hunt, Camden C.
  • Menard, Gabriel
  • Sepunaru, Lior

Other Information

Keywords

indenergy, Renewable Energy, Grid-Level Energy Storage System, Symmetric Redox Flow Batteries, Symmetric Charge Carrier

Categorized As