U.S. Department of Energy

Repurpose Energy provide affordable & sustainable energy storage solutions to enable the renewable energy transition.

ICE Thermal Harvesting was founded as a partnership between like-minded individuals who view the global energy supply holistically. We desire to help piece together the energy mosaic that will provide for the society of the future. ICE Thermal Harvesting is based in The Woodlands, TX and focuses on supplying zero-emission power in various regions around the world.

Dimensional Energy is a chemistry company focused on advancing artificial photosynthesis to produce sustainable polymers and chemical intermediates. The company develops innovative technology that efficiently captures and converts carbon dioxide, utilizing waveguides to distribute sunlight evenly throughout scalable reactors. By enhancing the reactivity of carbon dioxide molecules, Dimensional Energy aims to create hydrocarbon fuels that address significant energy requirements while promoting environmental responsibility. Their approach positions them at the forefront of solar fuel viability, leveraging novel, functionalized catalysts to transform energy production.

Quino Energy manufactures batteries that use specially designed reactants called quinones that are dissolved in water. It is made from low-cost coal tar and wood tar, and is more cost-effective than competing battery technologies at longer storage durations of 5-12 hours. Quino Energy has licensed the quinone flow battery technology from Harvard University, where it was first developed.

Element 16 Technologies, founded in 2016 and based in Glendale, California, specializes in high-temperature heat energy storage systems aimed at enhancing energy efficiency for commercial and industrial facilities. The company has developed an innovative thermal energy storage technology that utilizes a molten sulfur mixture, replacing traditional molten salts and thermal oils. This advancement allows customers to minimize wasted heat in cogeneration plants, thereby improving overall efficiency and significantly reducing their carbon footprint. Through its solutions, Element 16 Technologies seeks to provide cost-effective energy management options that contribute to sustainability in the energy sector.

Jolt Energy Storage Technologies, LLC, founded in 2015 and based in West Michigan, specializes in developing innovative compounds for lithium-ion batteries. The company focuses on creating organic electrochemical additives that enhance battery performance by increasing capacity, preventing overcharging, and simplifying electronic control systems. These advancements allow battery manufacturers to improve the safety, functionality, and cost-effectiveness of their products. Additionally, Jolt is working on all-organic nonaqueous redox flow batteries (RFBs) designed for large-scale energy storage, offering a reliable and environmentally friendly alternative to traditional battery technologies. With a commitment to sustainability, Jolt Energy aims to revolutionize the energy storage sector.

SolarReserve, a venture-backed renewable energy company, focuses on advanced solar thermal storage technology. SolarReserve was formed to solve two of the fundamental barriers of renewable energy: scalability and storage. Unlike hydroelectric, geothermal, biomass, and other renewable energy technologies that use limited renewable fuel sources, SolarReserve's power plants draw their heat from the sun - earth's ultimate source of clean energy. And unlike wind and photovoltaics, SolarReserve's power plants can deliver power whenever it is needed, either 24 hours per day or only during "peak" demand. By overcoming these two key barriers, SolarReserve enables utility-scale, clean, renewable electricity generation.

PolarPanel is a Forbes 30 Under 30 renewable energy startup focused on bringing clean, reliable, and low-maintenance refrigeration technology to the commercial cold chain.

Eonix is a manufacturer focused on developing semi-autonomous materials that streamline the design process for lithium-ion batteries. The company has introduced the ATLAS-system, an innovative research and development platform that significantly cuts down the time and costs associated with creating new materials. This system allows for the rapid design of drop-in compatible electrolyte solutions that enhance energy density and support higher voltage operations. By addressing specific challenges faced by electric vehicles, grid storage, and hybrid defense systems, Eonix aims to facilitate the adoption of clean technology and advance the performance of next-generation energy storage solutions.

Mesodyne's solution is a novel ultra-high energy density, multi-fuel, silent, compact power generator. Our generators convert fuel to electricity with heat and light as intermediaries: a small micro combustor heats a photonic crystal to incandescence and the resulting light is tailored to the bandgap of an infrared cell resulting in unprecedented high efficiencies.

Saratoga Energy Research Partners is focused on developing an innovative and cost-effective process to synthesize graphite from carbon dioxide. The company's technology utilizes electrochemical methods to separate CO2 into oxygen and graphitic carbon, which is a vital component for lithium-ion batteries. The graphite produced through this process is particularly advantageous for fast-charging electric vehicles and grid storage, making it suitable for a wide range of energy and industrial applications. Additionally, Saratoga is involved in the development of carbon nanotubes, which are nano-scale carbon fibers that exhibit high strength, electrical conductivity, and thermal conductivity. These properties enable various sectors to leverage fast charging solutions at competitive prices.

Solstice Energy Solutions uses IoT and software to enable, connect, and intelligently manage the shared-economy of distributed energy resources in emerging markets. The company was founded in 2016 and is headquartered in San Francisco, California.

Primus Power Corporation, founded in 2009 and based in Hayward, California, designs and manufactures advanced electrical energy storage systems, particularly focusing on flow batteries. Its flagship product, the EnergyPod 2, offers flexible capacity ranging from 25 kW to 25 MW, catering to various applications such as peak shaving, bulk energy shifting, renewable energy integration, grid support, and islanding. The EnergyPod provides up to five hours of energy discharge with a lifespan of twenty years, utilizing safe and low-maintenance Zinc Bromine chemistry. Primus Power serves a diverse clientele, including commercial and industrial sectors, data centers, microgrids, and utility customers, with systems deployed both domestically and internationally. The company is recognized for its patented innovations in battery technology, cell design, and system engineering, which contribute to its competitive pricing and reliability.

Giner Electrochemical Systems, LLC (GES) is a subsidiary of Giner, Inc., established May 2000, as an arms-length alliance between Giner, Inc. and General Motors Corporation (GM). GES is an independent business, majority-owned, controlled and operated by Giner, Inc. The alliance with GM allows us to help develop commercially-viable fuel cells for the next generation of transportation and stationary power systems. GES is also focused on the development and commercialization of related electrochemical technologies, including electrolyzers, sensors and capacitors for a range of applications.

24M Technologies, founded in 2010 and based in Cambridge, Massachusetts, specializes in the development of energy storage systems tailored for grid and transportation applications. The company manufactures lithium-ion batteries that enhance the operational reliability, economics, and efficiency of electric power systems. Its innovative design features binder-free semisolid electrodes and unit cells, which streamline the battery recycling process by eliminating the need for complex hydro or pyrometallurgical methods. This approach facilitates the direct reuse of active materials, ultimately enabling clients to improve efficiency and reduce costs associated with end-of-life battery management.

Located in Cambridge, MA, Sun Catalytix is an early-stage renewable energy startup founded on groundbreaking science from the research lab of Professor Daniel Nocera at MIT. With Nature as our inspiration, we seek to combine sunlight and water to provide affordable, highly distributed solar energy to the individual. The elemental components of just 3 gallons of water have enough energy, when recombined, to satisfy the daily energy needs of a large American home. The US receives 500-fold more energy each year than it uses, but unfortunately the sun shines only half the time. At Sun Catalytix we are working to realize the dream of cheap, renewable, personalized energy allowing individuals to use the power around-the-clock. Backed by Polaris Venture Partners, we have started down the path to a sustainable energy future.

Beacon Power, LLC specializes in the design, development, and manufacturing of grid-scale flywheel energy storage systems aimed at improving the reliability and stability of electricity grids in the United States and internationally. The company's innovative technology converts electric energy into rotating kinetic energy, which can be stored and transmitted efficiently. Beacon Power's products are utilized for various applications, including power grid efficiency, frequency regulation, and integration of renewable energy sources. In addition to its flywheel systems, the company offers grid stability services that enhance the performance of electric power grids. Headquartered in Tyngsboro, Massachusetts, Beacon Power operates facilities in Stephentown, New York; Hazle Township, Pennsylvania; and Tyngsboro, Massachusetts, focusing on delivering sustainable energy solutions for utility and distributed generation markets.

Resolute Marine Energy, Inc. is a Boston-based company founded in 2007 that specializes in developing wave energy converters to generate clean energy from ocean waves. The company focuses on harnessing ocean wave energy for power generation and transporting seawater to onshore desalination facilities, effectively producing potable water and electricity. Its technology serves various commercial applications, including open-ocean aquaculture, seawater desalination, and ocean observation systems. By providing wave-driven power services, Resolute Marine Energy aims to support sustainable development, align water supply and demand in water-stressed areas, and contribute to the reduction of carbon emissions. The company has received grants from the Department of Energy and was recognized as the 2010 winner of the Global Entrepreneurship Week's Startup Open competition.

EnerG2, Inc. is a manufacturer of advanced engineered carbon materials specifically designed for energy storage devices. Founded in 2003 and headquartered in Seattle, Washington, with an additional facility in Albany, Oregon, the company specializes in producing high-performance carbon materials for applications such as ultracapacitors, lead-acid batteries, and lithium-ion batteries. Utilizing proprietary manufacturing technologies, EnerG2 creates nano-structured carbon products that significantly enhance power density and cycle life, addressing the limitations of naturally occurring carbon materials. The company's focus on innovation positions it as a key supplier to energy storage device manufacturers.

A123 Systems is a prominent developer and manufacturer of advanced lithium-ion batteries and energy storage systems. The company leverages innovative nanoscale materials initially developed at MIT to create its proprietary Nanophosphate electrode technology, which offers significant advantages over competing high-power technologies. A123's battery cells and electrode designs are engineered to reduce costs per watt and per watt-hour, while also providing higher voltage compared to other long-life battery systems. This results in lower overall pack costs and enhanced price-performance due to the batteries' long lifespan, which minimizes lifecycle costs. A123 Systems serves clients across various industries by delivering efficient power solutions that increase battery life and safety in electronic devices. Competitors in the space include Valence, Saft, and Lion Cells.