Long-term cyclic tests of Sr-doped CaMnO₃ honeycombs and foams have been extended to more than 200 cycles, demonstrating materialisation of redox reactions to sensible heat effects and high thermochemical storage densities for both honeycombs and foams.

Efforts are targeted on scaling up the manufacturing of CaMnO₃-based structured bodies (foams and honeycombs) and prepare structures suited for several testing devices. Examples include the perforated foams in Figure 1, in order to accommodate thermocouple probes for temperature measurements along and across the porous structure during cyclic operation.

Additionally, parallel efforts involve extrusion of low-cost, refractory industrial by-products that can be used as sensible-only heat storage media. Typical such structures are shown in Figure 2.

Figure 1. Perovskite foams of various dimensions, pore densities and configurations

Figure 2. Refractory materials extruded into monolithic honeycombs.

This project is funded by the European Union’s Horizon Europe research and innovation programme under grant agreement No. 101084569.