Noon Energy: Cheap carbon based 100+ hour storage, 3X energy density of lithium-ion, near lithium-ion levels of round-trip efficiency

https://www.canarymedia.com/articles/long-duration-energy-storage/noon-energy-raises-28m-for-a-whole-new-kind-of-long-duration-storage

"scaled up lab prototype 50X suggesting will work at grid power plant scale, which helped them raise $28 million series A financing... stores energy by using electricity to split CO2 into solid carbon and oxygen gas; to discharge, it reverses the operation, oxidizing the powdery solid carbon... could one day power clean marine shipping or long-distance trucking... Early markets could include islands as well as remote microgrids"

Related:

Breakthrough Technology for Renewable Industrial Heat and Long-Duration Energy Storage Announces Fundraise and Upcoming Pilot

https://cache-energy.com/breakthrough-technology-for-renewable-industrial-heat-and-long-duration-energy-storage-announces-fundraise-and-upcoming-pilot-2/

Solar-plus-storage outperforms diesel in military survivability analysis

https://pv-magazine-usa.com/2023/11/08/solar-plus-storage-outperforms-diesel-in-military-survivability-analysis/