Scalable, thin asymmetric composite solid electrolyte for high‐performance all‐solid‐state lithium metal batteries

Abstract

All-solid-state Li metal batteries (ASSLMBs) have been considered the most promising candidates for next-generation energy storage devices owing to their high-energy density and safety. However, some obstacles such as thick solid electrolyte (SSEs) and unstable interface between the solid-state electrolytes (SSEs) and the electrodes have restricted the practical application of ASSLBs. Here, the scalable polyimide (PI) film reinforced asymmetric ultrathin (~20 μm) composite solid electrolyte (AU-CSE) with a ceramic-rich layer and polymer-rich layer is fabricated by a both-side casting method and rolling process. The ceramic-rich layer not only acts as a "securer" to inhibit the lithium dendrite growth but also redistributes Li-ions uniform deposition, while the polymer-rich layer improves the compatibility with cathode materials. As a result, the obtained AU-CSE demonstrates an ionic conductivity of 1.44 × 10 −4 S cm −1 at 35°C. The PI-reinforced AU-CSE enables

Single‐atom materials: The application in energy conversion

“…[29][30][31][32] After the bursting 2010s decade of SAMs, it has been applied in almost every field of catalysis, such as thermocatalysis, [33] electrocatalysis, [34][35][36][37][38] photocatalysis, [39] biocatalysis, [40] and so on. [41] When looking at the above catalytic process, they are always thought to be very different fields. However, there is a universal guideline hiding behind the external phenomenon.…”

Halide‐based solid electrolytes: The history, progress, and challenges

“…[ 4 ] Therefore, the use of Li metals as anodes to realize Li‐metal batteries (LMBs) is compulsory to achieve the high energy density (up to 500 Wh kg −1 ), which much exceeds that of the prevailing LIBs based on carbon anodes and organic liquid electrolytes. [ 5 ] However, in the process of battery operation, the growth of Li dendrites and low coulombic efficiency due to the continual formation and fragmentation of the solid electrolyte interphase (SEI) seriously hinder the development of LMBs.…”

Ionic Conductivity and Cycling Performance in PEO Polymer Electrolyte Enhanced by Non-Milled In Situ Nano-LLZO Powders

“…In the application of all solid-state batteries, a solid electrolyte with high ion conductivity, good mechanical properties, and excellent electrochemical performance is highly desirable. , Solid electrolyte is mainly divided into polymer solid electrolyte, − inorganic solid electrolyte, − and composite solid electrolyte . Recently developed garnet-type Li 7 La 3 Zr 2 O 12 (LLZO) solid electrolytes have received significant attention due to their high ionic conductivity (∼10 –3 S/cm) and excellent stability against lithium metal. − …”

“…8,9 Solid electrolyte is mainly divided into polymer solid electrolyte, 10−12 inorganic solid electrolyte, 13−15 and composite solid electrolyte. 16 Recently developed garnet-type Li 7 La 3 Zr 2 O 12 (LLZO) solid electrolytes have received significant attention due to their high ionic conductivity (∼10 −3 S/cm) and excellent stability against lithium metal. 13−15 The preparation method of LLZO often uses the solid-state reaction (SSR) method.…”