There's an article on electrek today about a company called Noon Energy who secured funding to commercialize Carbon Oxygen batteries. According to the article, compared to lithium-ion batteries, carbon oxygen batteries would:

• require only 1% of the critical elements
• cost about 10%
• have three times the energy density

There's not a lot of technical information, but I found this description from 2021:

It stores energy by splitting CO₂ into solid carbon and oxygen in a flow battery configuration, utilizing abundant materials and simple reaction chemistry.