Storing large amounts of thermal energy by integrating latent, thermochemical and sensible energy storage modes

https://www.nature.com/articles/s41586-024-08214-1

"boric/ succinic acid eutectic mixture transitions at around 150°C, with record high 394 ± 5% J g−1 reversible thermal energy uptake, by melting boric acid component... simultaneously undergoes dehydration into metaboric acid/ water, dissolving into the liquid readily rehydrating re-forming boric acid on cooling... thermal stability >1K heating/ cooling cycles... very low cost, eco-friendly/ sustainable... high energy density/ capacity/ efficiency"