RESUMO
Thermoelectrics are materials capable of the solid-state conversion between thermal and electrical energy. Carbon nanotube/polymer composite thin films are known to exhibit thermoelectric effects, however, have a low figure of merit (ZT) of 0.02. In this work, we demonstrate individual composite films of multiwalled carbon nanotubes (MWNT)/polyvinylidene fluoride (PVDF) that are layered into multiple element modules that resemble a felt fabric. The thermoelectric voltage generated by these fabrics is the sum of contributions from each layer, resulting in increased power output. Since these fabrics have the potential to be cheaper, lighter, and more easily processed than the commonly used thermoelectric bismuth telluride, the overall performance of the fabric shows promise as a realistic alternative in a number of applications such as portable lightweight electronics.
Assuntos
Fontes de Energia Elétrica , Transferência de Energia , Calefação/instrumentação , Nanoestruturas/química , Nanotubos de Carbono/química , Polivinil/química , Têxteis , Condutividade Elétrica , Desenho de Equipamento , Análise de Falha de Equipamento , Substâncias Macromoleculares/química , Conformação Molecular , Nanoestruturas/ultraestrutura , Nanotubos de Carbono/ultraestrutura , Tamanho da Partícula , Propriedades de Superfície , Condutividade TérmicaRESUMO
An electron donor/acceptor pi-conjugated polymer composed of a bi-EDOT and benzobis(thiadiazole) repeat unit exhibits two reductions with a band gap ranging from approximately 0.5 to 0.8 eV depending on the method of band gap determination.