High-temperature thermochemical energy storage via redox cycling of perovskites
Rahul R. BHOSALE, George THOMPSON, Mohammad MAHTABI
Abstract. As the global demand for sustainable energy intensifies, Concentrated Solar Power (CSP) systems offer a promising solution by converting solar thermal energy into electricity. However, the intermittent availability of sunlight necessitates efficient thermal energy storage to ensure uninterrupted power generation. Thermochemical energy storage (TCES) systems, particularly those utilizing metal oxides (MOs), present a high-density and long-duration energy storage alternative. Although experimental investigations associated with the application of La-based perovskites are available in the published literature, studies focussing on thermodynamics equlibrium and efficiency analysis are limited. Hence, in this study, the thermochemical performance of La0.5Sr0.5CoO3 (LSC55), a perovskite oxide, is analyzed to evaluate its potential for high-temperature TCES applications. A detailed non-stoichiometric and van’t Hoff analysis was performed to assess the redox behavior and quantify the energy storage capacity of LSC55 across a range of oxygen partial pressures (P_(O_2 )) and reduction temperatures (T_red). Results indicate that O2 release and corresponding non-stoichiometry (δ) increase with T_red and decrease in P_(O_2 ), achieving a maximum δ of 0.598 at 1473 K and 0.0001 atm. The van’t Hoff analysis further revealed that the TCES capacity of LSC55 varies significantly with δ, reaching up to 236.5 kJ/kg at optimal conditions. These findings establish LSC55 as a viable and tunable material for advanced TCES in CSP systems, supporting efforts toward a more stable and renewable energy future.
Keywords
Energy Storage, Thermochemical, Perovskites, Redox Cycles, High Temperature
Published online 6/20/2026, 7 pages
Copyright © 2026 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: Rahul R. BHOSALE, George THOMPSON, Mohammad MAHTABI, High-temperature thermochemical energy storage via redox cycling of perovskites, Materials Research Proceedings, Vol. 67, pp 40-46, 2026
DOI: https://doi.org/10.21741/9781644904176-6
The article was published as article 6 of the book Climate Action and Sustainability
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
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