In the search of new electrocaloric materials: Fast ion conductors | Zendy

Claudio Cazorla | Zendy

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In the search of new electrocaloric materials: Fast ion conductors

Author(s) -

Claudio Cazorla

Publication year - 2015

Publication title -

results in physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.743

H-Index - 56

ISSN - 2211-3797

DOI - 10.1016/j.rinp.2015.09.006

Subject(s) - electric field , conductor , electrical conductor , ion , ionic bonding , phase transition , materials science , fast ion conductor , electrocaloric effect , ionic conductivity , conductivity , condensed matter physics , chemical physics , chemistry , optoelectronics , physics , dielectric , ferroelectricity , electrolyte , organic chemistry , composite material , electrode , quantum mechanics

We analyse the effects of applying an electric field on the critical temperature at which superionicity appears in archetypal fast ion conductor CaF2, by means of molecular dynamics simulations. We find that the onset of superionicity can be reduced by about 100K when relatively small electric fields of ∼50KVcm−1 are applied. Under large enough electric fields, however, ionic conductivity is depleted. The normal to superionic phase transition is characterised by a large increase of entropy, thereby sizeable electrocaloric effects can be realised in fast ion conductors that are promising for solid-state cooling applications

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