Guo Jiaqi, Zhang Ding, Liu Lili, Li Qi, Fang Yanjie, Bai Peijia, Bo Yiwen, Zhou Yuetong, Wang Guangfa, Ma Rujun
School of Materials Science and Engineering, National Institute for Advanced Materials, Nankai University, Tianjin 300350, China.
ACS Nano. 2025 Aug 19;19(32):29448-29461. doi: 10.1021/acsnano.5c07273. Epub 2025 Aug 5.
Flexible thermoelectric materials have received growing attention for the development of flexible power sources and wearable electronics. Metal-organic framework (MOF) materials have driven the development of flexible thermoelectrics owing to their tailored electrical and thermal properties. However, the scarcity of effective n-type flexible thermoelectrics has hindered their widespread applications in traditional π-shaped thermoelectric device designs. We report a flexible and ductile n-type thermoelectric Nickel-Copper-MOF@Polyaniline/Nickel foam (NCM@PANI/NF) through an in situ synthesis and surface grafting. This foam exhibits a dominant Seebeck coefficient of -53.1 μV·K, a high electrical conductivity of 872.39 S·m, and a low thermal conductivity of 0.126 W·m·K, outperforming previously reported n-type thermoelectric MOF-based materials in terms of its comprehensive properties. Owing to its excellent shape-controlled capability, the ductile NCM@PANI/NF array device is capable of seamlessly adapting to heat sources of diverse shapes, enabling efficient thermal energy harvesting. This work demonstrates a promising approach for optimizing the performance and structural design of MOF-based materials in flexible thermoelectric power generation.
柔性热电材料在柔性电源和可穿戴电子产品的发展中受到了越来越多的关注。金属有机框架（MOF）材料因其可定制的电学和热学性质推动了柔性热电学的发展。然而，有效的n型柔性热电材料的稀缺阻碍了它们在传统π型热电装置设计中的广泛应用。我们通过原位合成和表面接枝报道了一种柔性且可延展的n型热电材料镍 - 铜 - 金属有机框架@聚苯胺/泡沫镍（NCM@PANI/NF）。这种泡沫材料表现出 -53.1 μV·K的主导塞贝克系数、872.39 S·m的高电导率以及0.126 W·m·K的低热导率，在综合性能方面优于先前报道的基于n型热电MOF的材料。由于其出色的形状控制能力，可延展的NCM@PANI/NF阵列器件能够无缝适应各种形状的热源，实现高效的热能收集。这项工作展示了一种在柔性热电发电中优化基于MOF材料的性能和结构设计的有前景的方法。
