Synthesis and Characterization of Li4(OH)3Br for Thermal Energy Storage

被引：0

作者：

Milan, Emily ^{[1
]}

Quirk, James A. ^{[2
]}

Cattermull, John ^{[1
,3
]}

Goodwin, Andrew L. ^{[3
]}

Dawson, James A. ^{[2
]}

Pasta, Mauro ^{[1
]}

机构：

[1] Univ Oxford, Dept Mat, Oxford OX1 3PH, England

[2] Newcastle Univ, Chem Sch Nat & Environm Sci, Newcastle Upon Tyne NE1 7RU, England

[3] Univ Oxford, Dept Chem, Oxford OX1 3QR, England

来源：

ACS APPLIED ENERGY MATERIALS | 2025年

基金：

英国科研创新办公室; 英国工程与自然科学研究理事会;

关键词：

phase change material; peritectic compound; crystal structure; enthalpy; storage capacity; PHASE-CHANGE MATERIALS; SELECTION; ALLOY;

D O I：

10.1021/acsaem.5c00359

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The peritectic compound Li4(OH)3Br has been suggested as a candidate material for latent heat thermal energy storage (TES), due to its high calculated melting enthalpy (804 J g-1) around 300 degrees C, however experimental reports have obtained much lower values (<= 250 J g-1). In this work, we show that the crystal structure established for Li4(OH)3Br in literature corresponds to a metastable hydrated compound, and instead propose that the thermodynamically stable phase belongs to the Pmnm space group. The hydrated phase dehydrates at similar to 175 degrees C, rendering the exceptional previous predictions inapplicable. An experimentally measured melting enthalpy of 263 +/- 3 J g-1 is found for high-purity Li4(OH)3Br. Theoretical modeling is used to suggest a crystal structure for Li4(OH)3Br, from which a melting enthalpy of 260 J g-1 is calculated, in good agreement with the experimental work, and supporting that nonetheless impressive storage capacity at similar to 290 degrees C can be offered by Li4(OH)3Br.

引用

页数：7

共 26 条

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