Room-temperature mechanocaloric effects in lithium-based superionic materials

Arun K. Sagotra, Dewei Chu and Claudio Cazorla ()
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Arun K. Sagotra: School of Materials Science and Engineering, UNSW Sydney
Dewei Chu: School of Materials Science and Engineering, UNSW Sydney
Claudio Cazorla: School of Materials Science and Engineering, UNSW Sydney

Nature Communications, 2018, vol. 9, issue 1, 1-7

Abstract: Abstract Mechanocaloric materials undergo sizable temperature changes during stress-induced phase transformations and hence are highly sought after for solid-state cooling applications. Most known mechanocaloric materials, however, operate at non-ambient temperatures and involve first-order structural transitions that pose practical cyclability issues. Here, we demonstrate large room-temperature mechanocaloric effects in the absence of any structural phase transformation in the fast-ion conductor Li3N (|ΔS| ~ 25 J K−1 kg−1 and |ΔT| ~ 5 K). Depending on whether the applied stress is hydrostatic or uniaxial the resulting caloric effect is either direct (ΔT > 0) or inverse (ΔT

Date: 2018
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DOI: 10.1038/s41467-018-05835-9

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