Mapping degradation of PCM and TCM
Subtask D
September 2025 - PDF 1.48MB

What is meant by material stability of compact thermal energy storage (CTES) materials? A general definition could be: A CTES material is stable if its relevant properties (e. g. melting/reaction enthalpy and temperature, chemical composition, etc.) remain unchanged within a certain limit (compared to the initial state) during and after testing. Testing can refer to both laboratory tests and monitoring of the CTES material within an energy storage system.

Therefore, to talk about CTES material stability, it is necessary to know or investigate the processes that lead to a CTES material no longer being stable. In the context of this Task, these processes are referred to as degradation mechanisms.

Compact Thermal Energy Storage
June 2023 - PDF 0.41MB

This position paper provides an overview of the compact thermal energy storage technologies market, outlining its importance, potential, and development. It addresses policy, decision makers, and influencers and aims to present high-level information as a basis for uptake and further development. It concludes by highlighting actions needed to further exploit thermal energy storages with minimal space requirements and accelerate more efficient energy systems, including sector coupling, with a higher share of renewables.

Compact Thermal Energy Storage Materials
July 2022 - PDF 0.6MB
Editor: Pamela Murphy

IEA SHC is again partnering with the IEA Energy Storage (ES) Programme to tackle storage issues. Building on earlier projects, IEA SHC and IEA ES are collaborating to push compact thermal energy storage technology developments and accelerate the market introduction of these technologies. To achieve these goals requires a diverse international team of experts from materials research, components development and system integration, and industry and research organizations.