Here, we demonstrate a breathing-like passive thermal management material based on moisture adsorption and desorption of graphene oxide (GO) modified chromium (III) terephthalate metal organic framework (MIL-101Cr), which breaks the limitation of latent heat limitation of common phase change materials and is highly desirable for long-term heat dissipation of batteries and chips. Nanoscale MIL-101Cr (50–100 nm) in-situ grown on the surface of GO (MIL-101Cr@GO) were prepared using a simple hydrothermal reaction method. In which, the MIL-101Cr acts as moisture adsorbent thus enables us to realize efficient heat dissipation through its moisture adsorption and desorption; while the GO acts as the nucleating agent for the growth of MIL-101Cr thus increases the nucleation rate and reduces the grain size of MIL-101Cr. As a result, the MIL-101Cr@GO shows high specific surface area and pore volume than that of pristine MIL-101Cr, resulting in higher moisture adsorption capacity and adsorption rate. In particular, the thermal management material MG₆ (composed of MIL-101Cr and 6 wt% GO) shows a high moisture adsorption capacity of 1.391 g g⁻¹ (i.e., 1 g absorbent can absorb 1.391 g moisture), 35.44% higher than that of MIL-101Cr. The thermal management material MG₆ achieves 9.0 °C temperature drop under 95% relative humidity for a ceramic heater with a heating power of 4 W (similar to a typical Li-ion battery), and keep at ∼43.2 °C for at least 2 h. In addition, the material MG₆ can remain 95% moisture adsorption capacity after 144 h of continuous operation, showing good thermal management performance and stability.

在这里，我们展示了一种基于氧化石墨烯（GO）改性的对苯二甲酸铬（III）金属有机骨架（MIL-101Cr）的吸湿和解吸的类似呼吸的被动热管理材料，打破了共相潜热限制的限制改变材料，非常适合电池和芯片的长期散热。使用简单的水热反应方法制备了在 GO 表面原位生长的纳米级 MIL-101Cr（50-100 nm）（MIL-101Cr@GO）。其中，MIL-101Cr作为吸湿剂，通过吸湿解吸实现高效散热；而GO作为MIL-101Cr生长的成核剂从而提高了成核速率并减小了MIL-101Cr的晶粒尺寸。其结果，MIL-101Cr@GO 显示出比原始 MIL-101Cr 更高的比表面积和孔体积，从而导致更高的水分吸附能力和吸附率。特别是热管理材料MG₆（由MIL-101Cr和6 wt% GO组成）显示出1.391 gg ^-1的高吸湿能力（即1 g吸收剂可以吸收1.391 g水分），比MIL-101Cr高35.44%。对于加热功率为 4 W（类似于典型的锂离子电池）的陶瓷加热器，热管理材料 MG ₆在 95% 相对湿度下实现了 9.0 °C 的温度下降，并在 ~43.2 °C 下保持至少 2 H。此外，材料MG ₆在连续运行144小时后仍能保持95%的吸湿能力，表现出良好的热管理性能和稳定性。