DOE Backs Eight Cold Fusion Projects With Up to $10 Million in Funding

Three decades after Martin Fleischmann and Stanley Pons electrified and then embarrassed the scientific world with their 1989 announcement of deuterium-deuterium cold fusion in an electrochemical cell, the U.S. Department of Energy has placed a formal bet on the field. On February 17, 2023, ARPA-E announced up to $10 million in funding distributed across eight selected projects studying low-energy nuclear reactions, the term researchers in this community have long preferred over the politically loaded "cold fusion."

The stakes ARPA-E set out explicitly: "should this field move forward given that LENR could be a potentially transformative carbon-free energy source, or does it conclusively not show promise?" That question has been officially unresolved since 1989, when DOE first reviewed Fleischmann and Pons's claims and declined to fund further research. A second review in 2004 reached a similarly cautious conclusion, finding that the body of evidence did not support the claim of D-D fusion, though it recommended that research proposals on deuterated heavy metals be evaluated through standard peer review. That recommendation was not acted on. According to one account of the 2004 outcome, a panel of experts recommended funding outright, but the Department did not follow through.

ARPA-E acknowledged that peer review never materialized "in part because LENR was largely dismissed by the scientific research community by 1990." Despite that dismissal, small groups worldwide kept working, reporting evidence of excess heat and nuclear reaction signatures including neutrons, tritium, helium-3, and helium-4, all on minimal budgets and largely outside mainstream publication channels.

The agency did not arrive at this funding decision quickly. Over the past two-plus years, ARPA-E revisited the LENR literature, issued a general request for information on nonconventional fusion approaches that drew substantial LENR-related responses, and convened a dedicated LENR workshop attended by more than 100 people. That room included long-time LENR researchers alongside scientists from adjacent disciplines, and institutions represented spanned government laboratories and federally funded research and development centers, top research universities, and private companies. ARPA-E stated that the information gathered from that process, including input from "reputable experts at prestigious U.S. academic institutions, laboratories, and private corporations," supported the decision to move forward.

The funding was issued under ARPA-E's Exploratory Topic framework, tied to Funding Opportunity Announcements DE-FOA-0002784 and DE-FOA-0002785. The program's explicit aim is to generate "diagnostic evidence of Low-Energy Nuclear Reactions that are convincing to the wider scientific community," prioritizing hypotheses-driven experimental approaches over speculative theory. The goal is not to declare LENR validated, but to establish the clear practices needed to answer that question definitively one way or the other.

DARPA, the Army, and NASA have each conducted low-level LENR research over the years, but none at the scale this ARPA-E commitment represents. The identities of the eight selected project teams and their specific experimental approaches were not included in the announcement materials available at publication. What is clear is that for the first time since Pons and Fleischmann stood before the cameras in Salt Lake City, the federal government has structured and funded a rigorous attempt to settle the question this field has never been able to close.