Stretchable thermoelectric generators metallized with liquid alloy
(English)Article in journal (Refereed) Submitted
We report on a conformal interconnect scheme for realization of soft and stretchable thermoelectric generators (STEGs) with conventional rigid thermoelectric Bi2Te3 pellets. The core idea is to use a Ga-based liquid alloy as the metallizing interconnect in order to achieve compliant electrical and thermal contacts between the Bi2Te3 pellets and the interconnect. The STEGs are fabricated by means of a tailored layer-by-layer fabrication process with the pellets encapsulated by a novel thermal elastomer composite for an improved energy harvesting efficiency. The prototype STEG modules not only exhibit an output power density of 30 µW/cm2 at a 20 °C temperature difference around room temperature, but also show remarkable operational reliability even after being mechanically stretched-and-released for over 1,000 times. The demonstrated interconnect scheme may open a door to the development of soft and stretchable energy harvesting avenues for a variety of emerging electronic applications.
Energy Engineering Textile, Rubber and Polymeric Materials Other Engineering and Technologies not elsewhere specified
IdentifiersURN: urn:nbn:se:uu:diva-281213OAI: oai:DiVA.org:uu-281213DiVA: diva2:913255