Figure 1 (IMAGE)

Tohoku University

Figure 1

Caption

Control of crystallite size in layered MnO₂ materials enables a dual-mode heat storage mechanism: conventional interlayer water intercalation and newly activated surface adsorption. As the nanosheets become thinner, surface interactions with water molecules are enhanced, manifesting as liquid-like or ice-like states depending on structural conditions. This structural refinement significantly improves heat storage performance, particularly below 100°C, offering a pathway for efficient utilization of low-grade thermal energy. 

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Hiroki Yoshisako et al.

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