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Pyrazolium Phase‐Change Materials for Solar‐Thermal Energy Storage
Author(s) -
Matuszek Karolina,
Vijayaraghavan R.,
Forsyth Craig M.,
Mahadevan Surianarayanan,
Kar Mega,
MacFarlane Douglas R.
Publication year - 2020
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201902601
Subject(s) - thermal energy storage , materials science , hydrogen storage , energy storage , supercooling , thermal stability , work (physics) , renewable energy , phase change material , temperature cycling , chemical engineering , thermal , thermodynamics , composite material , physics , electrical engineering , power (physics) , alloy , engineering
Thermal energy storage technology utilizing phase‐change materials (PCMs) can be a promising solution for the intermittency of renewable energy sources. This work describes a novel family of PCMs based on the pyrazolium cation, that operate in the 100–200 °C temperature range, offering safe, inexpensive capacity and low supercooling. Thermal stability and extensive cycling tests of the most promising PCM candidate, pyrazolium mesylate ( T m =168±1 °C, Δ H f =160 J g −1 ±5 %, Δ H total v =495 MJ m −3 ±5 %) show potential for its use in thermal storage applications. Additionally, this work discusses the molecular origins of the high thermal energy storage capacity of these ionic materials based on their crystal structures, revealing the importance of hydrogen bonds in PCM performance.