I believe this should be on-topic, since a lot of companies, governments and investors now pouring money into it again, despite it was debunked by mainstream science 25 years ago.
See:
Cold fusion: Science's most controversial technology is back
Bill Gates Reportedly Funds LENR Research at Texas Tech University
The sleuths at lenr-forum.com have uncovered some pretty convincing evidence Bill Gates aka William H. Gates III made a $4 or $5 million dollar donation to the Texas Tech Foundation “to be expended expeditiously and essentially entirely on research for the express purpose of … obviating the major extant technical ambiguities surrounding the set of phenomena in metal hydrides generally known as Anomalous Heat Effects (AHE).”
As per above article which states:
Earlier this year, the US House of Representatives Committee on Armed Services declared it was “aware of recent positive developments” in developing LENRs and noted their potential to “produce ultra-clean, low-cost renewable energy” and their “strong national security implications”. Highlighting too the interest of Russia, China, Israel and India, it suggested the US could not afford to be left behind, and requested that the Secretary of Defense provide a briefing on the science by 22 September.
If the research is back, then I don't see why this should be off-topic on this site.
As per this US House of Representatives Committee on Armed Services document:
The committee is aware of recent positive developments in developing low-energy nuclear reactions (LENR), which produce ultra-clean, low-cost renewable energy that have strong national security implications. For example, according to the Defense Intelligence Agency (DIA), ifLENR works it will be a "disruptive technology that could revolutionize energy production and storage." The committee is also aware of the Defense Advanced Research Project Agency's (DARPA) findings that other countries including China and India are moving forward with LENR programs of their own and that Japan has actually created its own investment fund to promote such technology. DIA has also assessed that Japan and Italy are leaders in the field and that Russia, China, Israel, and India are now devoting significant resources to LENR development.
For more details, please see this question: