Photo‐thermo‐electric hydrogel with interlocking photothermal layer and hydrogel for enhancement of thermopower generation

Abstract

Photothermal devices and thermoelectric cells hold great promise for energy generation but integration of the two remains a considerable challenge in real‐life power supply for sensors. Here, a novel photo‐thermo‐electric hydrogel (PTEH‐Interlocking) was constructed by the synthesis of a photothermal layer on a thermoelectric hydrogel with the redox pair Fe(CN)63−/Fe(CN)64−. The smart design of using the oxidation of pyrogallic acid by Fe(CN)63− to construct the photothermal layer for photo‐to‐heat conversion protected the redox couple of the thermogalvanic ion pair from ultraviolet damage, as well as triggered the formation of an interlocking structure at the interface of the photothermal layer and the thermoelectric hydrogel. The as‐prepared PTEH‐Interlocking has shown a high Seebeck coefficient and rapid heat transfer, boosting the photo‐thermo‐electric conversion. As a demonstration of a practical application, the PTEH‐Interlocking cells are successfully used as the energy supply for a mechanical sensor.image

Carbon Cloth Functionalized with Carbon Nanotubes for Hydroelectric Power Generation

“…However, although a large number of research results have successfully confirmed the existence of hydroelectricity, the current and power densities embodied in them are far from meeting the needs of commercial applications . Therefore, in order to realize the early and large-scale application of this technology, hydroelectric power generators urgently need to be integrated and applied to provide a clean, convenient, and safe way of energy production for human life …”