Nanomaterials (Dec 2020)

CuSO<sub>4</sub>/[Cu(NH<sub>3</sub>)<sub>4</sub>]SO<sub>4</sub>-Composite Thermochemical Energy Storage Materials

  • Danny Müller,
  • Christian Knoll,
  • Georg Gravogl,
  • Daniel Lager,
  • Jan M. Welch,
  • Elisabeth Eitenberger,
  • Gernot Friedbacher,
  • Andreas Werner,
  • Werner Artner,
  • Michael Harasek,
  • Ronald Miletich,
  • Peter Weinberger

DOI
https://doi.org/10.3390/nano10122485
Journal volume & issue
Vol. 10, no. 12
p. 2485

Abstract

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The thermochemical energy-storage material couple CuSO4/[Cu(NH3)4]SO4 combines full reversibility, application in a medium temperature interval (3 uptake. In order to limit this volume work, as well as enhance the thermal conductivity of the solid material, several composites of anhydrous CuSO4 with inorganic inert support materials were prepared and characterized with regard to their energy storage density, reversibility of the storage reaction, thermal conductivity, and particle morphology. The best thermochemical energy storage properties were obtained for a 10:1 CuSO4-sepiolite composite, combining an attractive energy storage density with slightly improved thermal conductivity and decreased bulk volume work compared to the pure salt.

Keywords