Hydrogen Bromine Battery

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Lawrence, Kansas
Project Term:
10/01/2012 - 06/30/2015

Critical Need:

Our national electric grid has limited ability to store excess energy, so electricity must constantly be generated to perfectly match demand. Though wind and solar power are promising clean alternatives to fossil fuels, their natural unpredictability and intermittency make them incapable of delivering the power on demand necessary to operate today’s grid. The U.S. needs technologies that can cost effectively store renewable energy for future grid use at any location. Flexible, large-scale storage would create a stronger and more robust electric grid by enabling renewables to contribute to reliable power generation. In addition, small modular storage deployed at homes and businesses could support distributed solar generation, and also provide backup power to increase grid reliability.

Project Innovation + Advantages:

TVN Systems is developing an advanced hydrogen-bromine flow battery that incorporates a low-cost membrane and durable catalyst materials. A flow battery’s membrane separates its active materials and keeps them from mixing, while the catalyst serves to speed up the chemical reactions that generate electricity. Today’s hydrogen-bromine batteries use very expensive membrane material and catalysts that can degrade as the battery is used. TVN is exploring new catalysts that will last longer than today’s catalysts, and developing new membranes at a fraction of the cost of today’s membranes. Demonstrating long-lasting, cost-competitive storage systems could enable deployment of renewable energy technologies throughout the grid.

Potential Impact:

If successful, TVN’s hydrogen-bromine energy storage system would cost less than $125/kWh, representing a substantial cost reduction over today’s best storage technologies that would support mass adoption of intermittent renewable energy generation.


A more efficient and reliable grid would be more resilient to potential disruptions.


Electricity generation accounts for over 40% of U.S. carbon dioxide (CO2) emissions. Enabling large-scale contributions of wind and solar power for our electricity generation would result in a substantial decrease in CO2 emissions.


Increases in the availability of wind and solar power would reduce fossil fuel demand, resulting in reduced fuel prices and more stable electricity rates.


ARPA-E Program Director:
Dr. Ping Liu
Project Contact:
Dr. Guangyu Lin
Press and General Inquiries Email:
Project Contact Email:


University of Kansas
Vanderbilt University

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