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Room-temperature mechanocaloric effects in lithium-based superionic materials.

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 (|?S| ~ 25?J K-1 kg-1 and |?T| ~ 5?K). Depending on whether the applied stress is hydrostatic or uniaxial the resulting caloric effect is either direct (?T?>?0) or inverse (?T?

SUBMITTER: Sagotra AK

PROVIDER: S-EPMC6102246 | biostudies-other | 2018 Aug

REPOSITORIES: biostudies-other

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Room-temperature mechanocaloric effects in lithium-based superionic materials.

Sagotra Arun K AK Chu Dewei D Cazorla Claudio C

Nature communications 20180820 1

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 Li<sub> ...[more]

PMID: 30127398

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