The market for alternatives for energy storage is starting to heat up, with this week EnerVenue cutting a deal with Schlumberger for $100 million of investment and Energy Vault going public in a new supposedly $388 million SPAC. Last year Breakthrough Energy Ventures put some cash into Form Energy which has since come out of stealth with an iron oxide battery using an aqueous electrolyte, and just last week we brought you news of a new porous carbon electrode that absorbs the chlorine in a lithium-thionyl chloride reaction. And last month Toyota brought back its Nickel Hydrogen battery for the Prius, which is another version of the same battery technology that EnerVenue is pushing. Ionix Technology reported last week a…