Concentrated solar thermal power (CSP) offers a clean renewable source of energy. Combined with energy storage, CSP can be dispatchable, on-demand power, decoupling solar energy supply with consumer energy demand, which is currently difficult with other renewables. Current thermal energy storage methods such as sensible or latent heat are currently cost-prohibitive due to low energy density. Thermochemical energy storage offers a potentially game-changing approach to storage thermal energy in the form of chemical bonds for later release. Thermochemical storage can be orders of magnitude more energy dense than previously explored energy storage methods. Here we explore a reversible decomposition-carbonation reaction involving SrCO₃/SrO and CO₂.

SEM image of porous SrO/SrCO₃ sample 8

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