Effect of Mn-ion reconstructed lattice on lead-free halide perovskite Cs3Bi2-XMnxCl9 Anode in Li-ion batteries.

Halide perovskite materials have received considerable attention for solar cells, LEDs, lasers etc. owing to their controllable physicochemical properties and structural advantages. However, little research has focused on energy storage and conversion applications, such as use as anodes in lithium-ion batteries. In this paper, all-inorganic lead-free halide perovskite Cs3Bi2Cl9 powders were synthesized by the grinding method, and the lattice was successfully adjusted via introducing Mn2+. The characterization results show that Mn-ion substitution can cause local lattice distortion to restructure the lattice, which will cause a mixed arrangement of [BiCl6] octahedra to improve the performance of the anode material. This new material can provide a feasible solution for solving the problem of low specific capacity anode materials caused by unstable crystal structures, and also indicates that such perovskites with unique crystal structures and lattice tunability have broad application prospects in lithium-ion batteries.