Nanosheets of layered manganese dioxide enable dual-mode high-density heat storage below 100°C via water adsorption

https://www.eurekalert.org/news-releases/1090733

"water molecules simultaneously absorbed (intercalated)/ adsorbed from atmosphere... water molecules enter MnO2 layers at around 130°C, surface adsorption emerging below 60°C by breaking down layered manganese dioxide into ultrathin nanosheets... this dual mechanism increases total amount storable water molecules by 1.5X, 30% enhances energy storage density compared to bulk MnO2... interlayer water exhibits solid-like characteristics, surface-adsorbed more like liquid... solar/ waste heat, thermoelectric"