Enhanced thermoelectric effect of cement composite by addition of metallic oxide nanopowders for energy harvesting in buildings

Abstract

In this paper, metallic oxide nanopowders were incorporated in cement matrix to increase the thermoelectric effect of cement composites. It can be seen from the result that the Seebeck coefficient of these composites increased steadily with metallic oxide content. And the Seebeck coefficients of these composites were measured to be higher than 1000 μV/°C, which were about 10 times higher than that of fiber reinforced cement composites indicated earlier. The increased surface density of the electronic state near the Fermi energy level of the nanostructured metallic oxide is very possibly responsible for the enhanced Seebeck coefficient of the cement composites. The high Seebeck coefficient of this kind of cement composite is important for the potential application in energy harvesting and airconditioning system of future buildings.

Electro-thermal properties and Seebeck effect of conductive mortar and its use in self-heating and self-sensing system

“…By comparing the Seebeck coefficient of the specimens in Table 6 with the results reported in Refs. [9,[16][17][18][19]27,28], we find that the Seebeck coefficient of some of the specimens at 25°C listed in Table 6 can be up to 3.0 mV/°C, which is higher than that reported previously by two to three orders of magnitude. A large variation in the amplitude makes it easy to measure the Seebeck voltage.…”

An Experimental Study on Static and Dynamic Strain Sensitivity of Embeddable Smart Concrete Sensors Doped with Carbon Nanotubes for SHM of Large Structures

“…Since the ’90s, the development of nanoengineered conductive particles has represented an important resource for the progress of engineering technologies [ 23 , 24 ]. Examples of application include smart nanocomposites, conductive coatings, nanodevices and nanoengineered materials [ 25 , 26 , 27 , 28 , 29 , 30 , 31 ]. Among other carbon-based fillers [ 15 , 32 ], CNTs have showed particularly promising capabilities.…”

Synergistic optimization of thermoelectric performance in cementitious composites by lithium carbonate and carbon nanotubes

“…The CFRC-Seebeck coefficient of 100.28 μV/ C 41 can be obtained by mixing Bi 2 O 3 , and the largest Seebeck coefficients of 3300 and 2500 μV/ C can be obtained by adding ZnO and Fe 2 O 3 , respectively. 29 However, carbon-based reinforced cement-based composites generally have a relatively higher electrical conductivity with small Seebeck coefficient. By contrary, metal oxide reinforced cementbased composites have a relative higher Seebeck coefficient value but lower electrical conductivity.…”