Journal of Inorganic Materials, Volume. 38, Issue 7, 793(2023)

Ionic Thermal Synthesis and Reversible Heat Storage Performance of Manganese-based Oxides

Bo MENG1, Gang XIAO2, Xiuli WANG1, Jiangping TU1, and Changdong GU1、*
Author Affiliations
  • 11. College of Materials Science and Engineering, Zhejiang University, Hangzhou 310058, China
  • 22. State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China
  • show less

    Concentrated solar power plant needs to be equipped with large-scale high-temperature heat storage module. Metal oxides can store and release heat through reversible redox reaction. Manganese oxides is non-toxic and cheap, showing great potential for applying in solar power plant, but it displays poor reversibility. Here, a manganese-based oxides with high reversibility by deep eutectic solvent (DES) ionic thermal synthesis was proposed, and effects of synthesis parameters and iron doping on heat storage performance were studied. MnCO3, as the raw material, was used to produce manganese oxides by ionic thermal decomposition at high temperature and released CO2, which could also form abundant pore structure, providing great channels for oxygen transmission and diffusionfor redox. Although this Mn2O3 synthesis method showed better reactivity than commercial Mn2O3, its oxidation rate was low. It is worth noting that oxidation rate of manganese iron oxide doped with 20% Fe, synthesized at 150 ℃, was fast. Its heat storage density reached 300.66 J/g, and reversibility of the reaction was the best, which could realize long-term stable cycle. Our results demonstrated that ionic thermal synthesis can increase the lattice oxygen ratio in manganese oxides, promoting migration of oxygen vacancies, and further improving reversibility and cyclic stability.

    Tools

    Get Citation

    Copy Citation Text

    Bo MENG, Gang XIAO, Xiuli WANG, Jiangping TU, Changdong GU. Ionic Thermal Synthesis and Reversible Heat Storage Performance of Manganese-based Oxides[J]. Journal of Inorganic Materials, 2023, 38(7): 793

    Download Citation

    EndNote(RIS)BibTexPlain Text
    Save article for my favorites
    Paper Information

    Category:

    Received: Nov. 7, 2022

    Accepted: --

    Published Online: Dec. 28, 2023

    The Author Email: GU Changdong (cdgu@zju.edu.cn)

    DOI:10.15541/jim20220658

    Topics