Mn/Al modified calcium-based energy storage materials with high stability

Mn and Al co-doped calcium-based energy storage materials were synthesized using safe and non-toxic precursors through a modified sol-gel method. The energy storage performance of the materials was carefully studied, and the effects of preliminary scale-up synthesis on material properties were examined. The results demonstrate that the co-doped material Ca100Mn15Al10-Ac synthesized from calcium acetate exhibited excellent stability during 1000 energy storage cycles with only 23.2% performance degradation (mainly occurring in the initial stage), and the average solar absorptance reaches 70.1%. Morphology analysis revealed that the evolution of stable porous structure during cycling effectively suppressed performance decay. The initial scale-up synthesis of the material and the addition of microcrystalline cellulose binder will not have a negative impact on the stability of Ca100Mn15Al10-Ac, which is conducive to subsequent large-scale preparation.