Giant barocaloric effects over a wide temperature range in superionic conductor AgI

被引：126

作者：

Aznar, Araceli ^{[1
]}

Lloveras, Pol ^{[1
]}

Romanini, Michela ^{[1
]}

Barrio, Maria ^{[1
]}

Tamarit, Josep-Lluis ^{[1
]}

Cazorla, Claudio ^{[2
]}

Errandonea, Daniel ^{[3
]}

Mathur, Neil D. ^{[4
]}

Planes, Antoni ^{[5
]}

Moya, Xavier ^{[4
]}

Manosa, Lluis ^{[5
]}

机构：

[1] Univ Politecn Cataluna, Campus Diagonal Besos & Barcelona Res Ctr Multisc, EEBE, Dept Fis, Eduard Maristany 10-14, Barcelona 08019, Catalonia, Spain

[2] Univ New South Wales Australia, Sch Mat Sci & Engn, Sydney, NSW 2052, Australia

[3] Univ Valencia, Dept Fis Aplicada ICMUV, E-46100 Burjassot, Spain

[4] Univ Cambridge, Dept Mat Sci, Cambridge CB3 0FS, England

[5] Univ Barcelona, Dept Fis Mat Condensada, Fac Fis, Marti & Franques 1, E-08028 Barcelona, Spain

来源：

NATURE COMMUNICATIONS | 2017年 / 8卷

基金：

欧洲研究理事会; 澳大利亚研究理事会;

关键词：

SOLID-STATE REFRIGERATION; SILVER-IODIDE; THERMAL-EXPANSION; PHASE-TRANSITION; ELECTROCALORIC MATERIALS; CRYSTALLINE-STRUCTURE; PRESSURE; HALIDES; POLYMORPHISM; SYSTEM;

D O I：

10.1038/s41467-017-01898-2

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Current interest in barocaloric effects has been stimulated by the discovery that these pressure-driven thermal changes can be giant near ferroic phase transitions in materials that display magnetic or electrical order. Here we demonstrate giant inverse barocaloric effects in the solid electrolyte AgI, near its superionic phase transition at similar to 420 K. Over a wide range of temperatures, hydrostatic pressure changes of 2.5 kbar yield large and reversible barocaloric effects, resulting in large values of refrigerant capacity. Moreover, the peak values of isothermal entropy change (60 J K-1 kg(-1) or 0.34 J K-1 cm(-3)) and adiabatic temperature changes (18 K), which we identify for a starting temperature of 390 K, exceed all values previously recorded for barocaloric materials. Our work should therefore inspire the study of barocaloric effects in a wide range of solid electrolytes, as well as the parallel development of cooling devices.

引用

页数：6

共 56 条

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