Maji Tanmoy, Rousti Anna Maria, Kazi Abbas Parvez, Drew Christopher, Kumar Jayant, Christodouleas Dionysios C
Department of Chemistry, University of Massachusetts Lowell, Lowell, Massachusetts 01854, United States.
Department of Physics and Applied Physics, University of Massachusetts Lowell, Lowell, Massachusetts 01854, United States.
ACS Appl Mater Interfaces. 2021 Oct 6;13(39):46919-46926. doi: 10.1021/acsami.1c12237. Epub 2021 Sep 21.
Thermoelectric composites of organic and inorganic materials exhibit significantly enhanced thermoelectric properties compared with pristine organic thermoelectrics so they might be better suited as core materials of wearable thermoelectric devices. This study describes the development of three-dimensional (3D) paper PEDOT:tosylate/CuI composites that could be shaped as 3 mm thick blocks to convert a temperature difference between their bottom and top sides into power; the majority of organic thermoelectric materials are shaped as thin strips usually on a planar substrate and convert a temperature difference between the opposite edges of the strips into power. The 3D paper PEDOT:tosylate/CuI composites can produce a power density equal to 4.8 nW/cm (Δ = 6 Κ) that is 10 times higher than that of the pristine paper PEDOT:Tos composites. The enhanced thermoelectric properties of the paper PEDOT:tosylate/CuI composites are attributed to the CuI nanocrystals entrapped inside the composite that increases the Seebeck coefficient of the composite to 225 μV K; the Seebeck coefficient of paper PEDOT:Tos is 65 μV K. A proof-of-concept wearable thermoelectric device that uses 36 blocks of the paper PEDOT:tosylate/CuI composites (as -type elements) and 36 wires of monel (as -type elements) can produce up to 4.7 μW of power at Δ = 20 K. The device has a footprint of 64 cm and can be placed directly over the skin or can be embedded into clothing.
与原始有机热电材料相比，有机和无机材料的热电复合材料表现出显著增强的热电性能，因此它们可能更适合作为可穿戴热电设备的核心材料。本研究描述了三维（3D）纸质聚（3,4-乙撑二氧噻吩）：对甲苯磺酸盐/碘化亚铜复合材料的开发，该复合材料可成型为3毫米厚的块体，将其底面和顶面之间的温差转化为电能；大多数有机热电材料通常成型为平面基板上的细条，并将条带相对边缘之间的温差转化为电能。3D纸质聚（3,4-乙撑二氧噻吩）：对甲苯磺酸盐/碘化亚铜复合材料可产生等于4.8 nW/cm²（ΔT = 6 K）的功率密度，这比原始纸质聚（3,4-乙撑二氧噻吩）：对甲苯磺酸盐复合材料高10倍。纸质聚（3,4-乙撑二氧噻吩）：对甲苯磺酸盐/碘化亚铜复合材料热电性能的增强归因于包裹在复合材料内部的碘化亚铜纳米晶体，它将复合材料的塞贝克系数提高到225 μV/K；纸质聚（3,4-乙撑二氧噻吩）：对甲苯磺酸盐的塞贝克系数为65 μV/K。一个概念验证的可穿戴热电设备，使用36块纸质聚（3,4-乙撑二氧噻吩）：对甲苯磺酸盐/碘化亚铜复合材料（作为p型元件）和36根蒙乃尔合金线（作为n型元件），在ΔT = 20 K时可产生高达4.7 μW的功率。该设备占地面积为64 cm²，可以直接放置在皮肤上或嵌入衣服中。
