Thermochemical behavior of perovskite oxides based on LaxSr1-x(Mn, Fe, Co)O3-δ and BaySr1-yCoO3-δ redox system for thermochemical energy storage at high temperatures

Nobuyuki Gokon, Takehiro Yawata, Selvan Bellan, Tatsuya Kodama and Hyun-Seok Cho

Energy, 2019, vol. 171, issue C, 971-980

Abstract: LaxSr1-x(Mn, Fe, Co)O3-δ, and BaySr1-yCoO3-δ perovskite oxide powders were investigated as potential thermochemical energy storage (TES) materials operated at high temperatures above 600 °C. The purpose of the research is to provide complete characterization of the impact of partial A- and B-site substitution on the reactivity, kinetics, redox reaction repeatability and charging/discharging storage capacity. The perovskite oxides were investigated by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) at temperatures of 500–1100 °C. Thermal energy storage was evaluated in terms of the enthalpy of the reversible reactions of oxygen release (reduction) and uptake (oxidation) upon heating the oxide materials in air stream. Among the perovskites tested, Ba0.3Sr0.7CoO3-δ and Ba0.7Sr0.3CoO3-δ powders were suitable thermochemical storage materials operating at above 600 °C in terms of chemical reactivity, charging/discharging temperatures and storage capacities, kinetics of oxygen uptake/release, and repeatability of thermochemical cycling. Further, charging/discharging capacity for both perovskites was comparable to that for Fe-doped manganese oxide.

Keywords: Reactive ceramics; Perovskite oxide; Thermochemical cycling; Chemical energy storage; Charging/discharging processes; Concentrated solar power (search for similar items in EconPapers)
Date: 2019
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Citations: View citations in EconPapers (4)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:171:y:2019:i:c:p:971-980

DOI: 10.1016/j.energy.2019.01.081

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