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In 2024, four climate-technology companies were reported to receive government awards totaling more than $63 million—about $60 million when rounded for a headline. The reported individual amounts add up to $63.5 million. Their projects target different markets: industrial heat and power, cement manufacturing, batteries, and building insulation. Antora Energy separately announced that it had been selected to begin negotiations for up to $14.5 million; the detailed amounts for the other three companies are available here through secondary reporting.
Which companies were named, and how much was reported?
A 2024 secondary account reported awards for four companies. The amounts below are reported figures, not verified final executed grant amounts for every recipient.
| Company | Reported amount | Target application |
|---|---|---|
| Antora Energy | Up to $14.5 million; the company said it was selected to begin negotiations | Thermal energy storage for industrial heat and power |
| Queens Carbon | $14.5 million, according to secondary reporting | Lower-emissions cement manufacturing |
| Ion Storage Systems | $20 million, according to secondary reporting | Solid-state lithium-metal batteries |
| AeroShield Materials | $14.5 million, according to secondary reporting | Aerogel insulation for windows and doors |
The secondary account described the combined awards as more than $63 million. Adding its four reported company figures gives $63.5 million; that is an arithmetic total, not a separately reported award statistic. Antora’s own June 25, 2024 announcement supports its selection for negotiations up to $14.5 million, rather than confirming a final disbursement.
What does each company make?
Antora Energy: storing renewable energy as heat
Antora says its thermal battery uses renewable electricity to heat solid carbon inside an insulated module. That stored heat can be supplied to industrial processes or converted back into electricity using thermophotovoltaic technology. The company’s June 25, 2024 announcement said the proposed ARPA-E SCALEUP award—up to $14.5 million—was intended to accelerate a combined heat and power thermal battery product. Read Antora’s announcement.
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Antora also published a statement attributed to ARPA-E Director Evelyn N. Wang: “Through an ARPA-E program focused on long duration energy storage to increase utilization of renewable generation assets, Antora Energy developed, manufactured, and tested a novel thermophotovoltaic cell with high efficiency for a thermal battery,”. The quotation is presented as Antora published it; it is not independently corroborated here by an ARPA-E source.
Queens Carbon: cement manufacturing
Secondary reporting associates Queens Carbon’s reported $14.5 million award with lower-emissions cement. That makes its project distinct from energy storage: the stated application is changing a major industrial material’s production, not storing electricity for later use. The available information does not establish a final award amount, current deployment stage, or measured emissions result.
Rank #2
Ion Storage Systems: solid-state batteries
Secondary reporting describes Ion Storage Systems’ work as solid-state lithium-metal batteries and puts its reported award at $20 million. This is the largest of the four reported amounts, but the available account does not provide comparable performance testing or establish that the funding has resulted in commercial availability.
AeroShield Materials: insulation for windows and doors
Secondary reporting links AeroShield Materials to aerogel insulation for windows and doors. A Greentown profile describes its silica aerogel as a material in which gas is held in small pores that reduce heat transfer. That description offers context for the insulation concept, not a full technical assessment or evidence of product performance at scale.
Why the four awards are not directly comparable
The companies are pursuing different products for different customers. Antora addresses industrial heat and power; Queens Carbon targets cement production; Ion Storage Systems works on batteries; and AeroShield focuses on building-envelope insulation. Their reported award sizes do not indicate which technology is most effective, closest to market, or likely to produce the greatest climate benefit. The available sources provide neither a consistent readiness measure nor shared performance tests across the four projects.
The stated purpose of the funding was to help technologies move beyond laboratory or pilot stages toward deployment. That is an intended pathway, not proof that every project has reached commercial scale or delivered measured emissions reductions. Beyond Antora’s company announcement, the detailed recipient and award breakdown described here rests on secondary reporting.
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