Surface Micron-Structure Engineering of Halide Perovskite Doped Glass-Ceramic and Its Ionic Transport Application

Abstract

Halide perovskite crystals embedded in oxide glass matrix have inspired recent researches, owing to their applications in photoelectrical devices, but the dimension-tunable structures have rarely applied in electrochemical property enhancement. Herein, a novel glass-ceramic with mixed 0D/3D perovskite quantum dots (PQDs) as an anode material was fabricated by a traditional melt-and-quench method, and the growth patterns in the bulk or on the surface of the glass were systematically studied.Two types of microstrutures with dendrite and flake type of morphologies were devloped. The encapsulated micron-sized derivatives show outstanding ionic transport property as a potential anode material for Li-ion batteries (LiBs), manifesting long cyclic life, high specific capacity retention and increased rate performance. Additionally, the glass matrix serves as a media to accomodate lattice expansion of crystals, avoiding structure collapse and stabilizing ion transport channels. The verifiable lithiation mechanism and practical properties open the door for electrochemical applications of halide perovskite containing glass-ceramic materials.

SnF2-Doped Cs4PbBr6 Glass Ceramic as a High-Performance Anode for Li-Ion Batteries

“…From the IR spectra shown in Figure 3f, it can be confirmed that the strong bands at 820, 1104, and 1460 cm −1 now have B−O asymmetric stretch in units. 18 Then, irreversible structural changes take place involving disruption of B−O−B bonds between the borate units. This disruption can be seen from the presence of some typical bands for pyroborate at 1115 cm −1 .…”

“…This results in a lower formation enthalpy of tin vacancy defects, which is more stable than the structure of Cs 4 PbBr 6 . Using Sn ions to replace Pb ion sites can also improve the stability of perovskite …”

“…Using Sn ions to replace Pb ion sites can also improve the stability of perovskite. 18 Herein, we designed the SnF 2 -doped Cs 4 PbBr 6 glass ceramic, which introduces F ions to reduce the transition phase, and Sn ions and halogen ions simultaneously to improve the structural stability at the same time. Through microstructure characterization, we analyzed the effect of SnF 2 on the growth of the Cs 4 PbBr 6 glass ceramic and the potential mechanism of action.…”

Surface Modification Strategy Synthesized CsPbX3 Perovskite Quantum Dots with Excellent Stability and Optical Properties in Water

“…It has a good application prospect in light emitting diode, photo detector, solar cell, laser and other fields. [ 1–7 ] In particular, the CsPbX 3 (X = Br, Cl, I) PQDs are considered to be a promising luminescent material. However, the poor stability to air, temperature, especially water, which seriously limits their practical application in the field of optoelectronic.…”

“…It has a good application prospect in light emitting diode, photo detector, solar cell, laser and other fields. [1][2][3][4][5][6][7] In particular, the CsPbX 3 (X = Br, Cl, I) PQDs are considered to be a promising luminescent material. However, the poor stability to air, temperature, especially water, which photoluminescence (PL) intensity remained at 60% after 24 h. Compared with CsPbBr 3 PQDs synthesized by OA as a surface ligand, the PL intensity decreased to <1% after only 1 h. This method can also improve the stability of CsPbCl 3 and CsPbI 3 PQDs in water.…”