Gravitricity
A simple concept that uses weights and winches to store energy. Initial applications are in existing mine shafts, plans are to add drilled shafts. Claimed to be cheaper than other energy storage technologies including batteries. Website
Private/Startup
SoMax BioEnergy
From their website: Our technology platform treats waste in an innovative and groundbreaking hydrothermal carbonization (HTC) process, eliminating harmful pharmaceuticals, plastics, and toxins from organic waste. The rapid conversion process yields clean, renewable biofuel, natural fertilizers, and clean water. Website
GKN Hydrogen
Metal hydride hydrogen storage Website
Plasma Kinetics
Extracts hydrogen from exhaust gases. Website
Flibe Energy
Lithium Fluoride Thorium Reactor (LFTR). The founder is Kirk Sorensen who has been an evangelist for the LFTR design and Thorium fuel for years. Flibe is named after the molten salt coolant, a mixture of Lithium Fluoride and Beryllium Fluoride called Flibe (Fl Li Be). The Thorium fuel is mixed with the coolant and cycled …
Ultra Safe Nuclear Corporation
The company name was obviously intended to address the primary perceptual challenge with nuclear energy. Micro Modular Reactor (MMR) uses TRISO fuel (see this link). Helium is used as the coolant. Overall the design seems very similar to X-energy. Website
Radiant Nuclear
Mobile nuclear power. Very few details on their website as to the reactor design. Website
Kairos Power
Fluoride salt-cooled high temperature reactor (KP-FHR) uses solid TRISO fuel pellets of 19.75% enriched uranium. Website
TerraPower
Molten Chloride Fast Reactor combined with molten salt energy storage. Also working on a Traveling Wave Reactor that could burn natural U-238. From TerraPower’s website: The Natrium technology, co-developed by TerraPower and GE Hitachi Nuclear, offers the best way to deploy advanced nuclear power and meet the demands of the clean energy transition. The sodium …
Aptera
Focus on increasing efficiency of the car resulting in more range and faster recharge by using a smaller battery pack. Increased efficiency also allows onboard solar cells to contribute significant miles per day of recharge. The company has over 25,000 reservations (it costs $100 to reserve). Price ranges from $26K – $47K depending on size …