CsPbCl3 and Mn:CsPbCl3 perovskite nanocubes/nanorods as a prospective cathode material for LIB application

CsPbCl3 and Mn:CsPbCl3 nanocubes/nanorods were prepared by a hot injection technique. The crystal structure, size and morphology of the CsPbCl3 and Mn:CsPbCl3 samples were measured by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The edgelengths of the nanocubes and the length and width of the nanorods of CsPbCl3 are between tens and hundreds of nanometers. The size and morphology of Mn:CsPbCl3 are similar to those of CsPbCl3. The introduction of Mn2+ ions led to little change in the CsPbCl3 host structure. Their electrochemical properties for LIB application were tested by cyclic voltammetry, galvanostatic charge-discharge and electrochemical impedance spectroscopy. The introduction of a small amount of Mn2+ ions can improve the structural stability of CsPbCl3 during charge-discharge cycles because the Mn2+ part replaces the Pb2+ ions of CsPbCl3. Thus, Mn:CsPbCl3 shows high discharge specific capacities, excellent cyclic performance, and lower electrochemical impedance values than CsPbCl3 in LIB applications.