Stabilized anode-electrolyte interfaces via Cs4Pb(Cl/Br/I)6 perovskite crystal based glass-ceramics for fast and long cycle-life lithium ion batteries

Abstract

Alternative choices of anode materials in lithium-ion batteries (LiBs) have drawn great attention to the urgent demands of rapid charging, however, the severe interface problems remain a bottleneck for the anode development. Based on the high reducibility of halogen elements, herein a smart anode/liquid electrolyte interface is designed for the high energy density batteries that present large specific capacity retentions of about 510.5 mAh∙g−1 (Cl-matrix) and 429.6 mAh∙g−1 (Br-matrix) at the current density of 5 A∙g−1 after cycling 1000 times. As a novel anode material, the low-dimension halide perovskite microcrystals Cs4Pb(Cl/Br/I)6 embedded in the glass matrix present high ionic conductivities (10−5 ∼ 10−4 S∙cm−1) that enables fast charge transfer, besides the smooth interface benefits ionic transport reversibly. Most impressively, simple composite processing has significant economic benefits that might drive the crystal-in-glass composite material as a promising new generation anode for rechargeable LiBs.