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Thermochemical energy storage: bridging the gap between solar energy and long-term energy storage

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  • Kong, Hui
  • Tang, Xiangnan
  • Ma, Tengyu
  • Guo, Yongpeng
  • Yang, Zhiqin
  • Wang, Hongsheng

Abstract

The intermittent nature of solar energy significantly hampers its broader use. In response, thermal energy storage emerges as a prime solution, leveraging its cost efficiency and low corrosivity to efficiently harness solar power. Among the various strategies available, thermochemical energy storage is particularly notable for its superior energy density and minimal loss of energy, allowing for long-term and large-scale energy storage with high energy density. This document thoroughly reviews potential thermochemical energy storage reactions, with a special focus on those operating at temperatures below 2000 °C. It explores the foundational advancements of each reaction system, evaluates ongoing research efforts and obstacles, and outlines potential directions for future advancements. The insights offered are designed to inform and direct the development and selection of thermochemical energy storage systems, paving the way for their future implementation.

Suggested Citation

  • Kong, Hui & Tang, Xiangnan & Ma, Tengyu & Guo, Yongpeng & Yang, Zhiqin & Wang, Hongsheng, 2026. "Thermochemical energy storage: bridging the gap between solar energy and long-term energy storage," Renewable and Sustainable Energy Reviews, Elsevier, vol. 229(C).
    • Handle: RePEc:eee:rensus:v:229:y:2026:i:c:s1364032125013310
    DOI: 10.1016/j.rser.2025.116658
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