Electrospinning Equipment for Research| Constructing a Dielectric Fluorinated SolidElectrolyte for Practically Operated Al-Solid-State Lithium-Meta Batteries

ACS Nano (IF 15.8): Dielectric Fluorinated Solid Electrolytes for All-Solid-State Lithium Metal Batteries

Challenge: All-solid-state lithium metal batteries (ASSLMBs) are a promising solution to overcome the low energy density and safety issues of liquid Li-ion batteries. However, the performance of ASSLMBs is limited by inferior solid electrolytes.

Approach: Academician Yu Jianyong and Professor Yan Jianhua from Donghua University employed porous dielectric fluorinated electrolytes to encapsulate Li+ complexes, achieving fast and stable ion conduction throughout cycling.

Innovation 1: The dielectric polarized porous nanofibers effectively dissociate LiTFSI to form rapidly conductive Li+ complexes, while F-BaTiO3−δ bonds with PVDF-b-PTFE and PEO to form stable cross-phase Li+ conduction pathways. This results in an electrolyte with high room-temperature conductivity (5.64 × 10–4 S cm–1) and low activation energy (0.21 eV).

Innovation 2: The all-solid-state LiFePO4 battery demonstrates stable cycling for 1000 cycles at 0.5 C with a capacity retention of 87.45%. Additionally, NCM811//Li and 30-Ah pouch cells exhibit high cycling stability, showcasing potential for commercial applications.

DOI: https://doi.org/10.1021/acsnano.5c01171