Premium
A Ceramic‐PVDF Composite Membrane with Modified Interfaces as an Ion‐Conducting Electrolyte for Solid‐State Lithium‐Ion Batteries Operating at Room Temperature
Author(s) -
Yu Jing,
Kwok Stephen C. T.,
Lu Ziheng,
Effat Mohammed B.,
Lyu YuQi,
Yuen Matthew M. F.,
Ciucci Francesco
Publication year - 2018
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201800643
Subject(s) - electrolyte , polyvinylidene fluoride , materials science , battery (electricity) , lithium (medication) , composite number , electrode , chemical engineering , conductivity , ionic conductivity , anode , lithium ion battery , quasi solid , fast ion conductor , composite material , polymer , chemistry , power (physics) , physics , quantum mechanics , dye sensitized solar cell , medicine , engineering , endocrinology
Solid‐state batteries hold great promise because of their safety and high projected energy density. However, the sizeable interfacial resistance between the electrodes and the electrolyte of such batteries is a significant bottleneck in the development of this technology. In this work, we develop a Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 (LLZTO) and polyvinylidene fluoride (PVDF) solid‐state composite membrane characterized by high conductivity, tensile strength, and flexibility as well as low impedance if interfacially modified by a minute amount of liquid electrolyte. A solid‐state lithium‐ion battery using this electrolyte with LiFePO 4 and Li as electrodes delivers excellent rate capability and cycling stability at room temperature. In particular, the battery shows an initial discharge capacity of 155 mAh g −1 and, after 100 cycles at 1C, of 145 mAh g −1 . Even at 4C, the discharge capacity is 96 mAh g −1 . Our study suggests that the interfacially modified LLZTO‐PVDF membrane is a promising electrolyte for solid‐state lithium‐ion batteries.