The main goal of the project is to study physicochemical properties of organo-lead halide perovskites in context their use as components of negative electrode materials in lithium-ion batteries. Initial studies of lead halide perovskites will be extended to guide further combinational engineering of more complex ABX3-type perovskite materials like multicationic perovskites, containing cations like Cs+ MA+, FA+ and out-of-tolerance-factor cations (like Gua+, Aca+, DMA+ and other) as well as lead-free perovskites like Cs2AgBiBr₆ or Cs2SnBr₆• Ion mixing is a well know strategy for stabilization of the alpha-perovskite phase and affording more durable materials. We suspect that some of the compositions like will provide higher stability or capacitance in comparison with neat monocationic perovskites. As unique novelty we plan to modify bulk and surface propertles of best-performing perovskites with Hückel salts in one step mechanochemical process as well as two step process. The self tailor-made all-inorganic and hybrld metal halide perovskite materials will thereafter be used as artificial SEI protecting layers of negative electrodes in lithium-Ion batteries. A set of experiments in which perovskites will be used as artiflcially obtained SEI layers deposited on the electrodes will be performed. We intend to run a series of experiments using intercalated (graphite) alloy type (Li-Sn, Li-Si) and metallic lithium as the major negative electrode components. We plan to use three different type of Hückel salts LiDTI -whlch is commercially available, and custom syntheslzed LiPDI and LiHDI. The idea behind this procedure is to analyze the effect of type of Hückel anion on electrochemical stability of electrode- electrolyte interface.

References

1. M. Armand, P. Johansson, M. Bukowska, P. Szczecinski, L. Niedzicki, M. Marcinek, M. Dranka, J. Zachara, G. Zukowska, M. Marczewski, G. Schmidt and W. Wieczorek, J. Electrochem. Soc., 2020, 167, 070562.
2. P. Jankowski, W. Wieczorek and P. Johansson, Energy Storage Mater., 2019, 20, 108-117.
3. D. Prochowfoz, M. Saski, P. Yadav, M. Gratzel and J. Lewinski, Ace. Chem. Res., 2019, 52, 3233-3243.

Supervisor(s) contact: WIECZOREK Wladyslaw wladek@ch.pw.edu.pl