Premium
Unitized Configuration Design of Thermally Stable Composite Polymer Electrolyte for Lithium Batteries Capable of Working Over a Wide Range of Temperatures
Author(s) -
Li Ruguang,
Wu Dabei,
Yu Le,
Mei Yueni,
Wang Libin,
Li Heng,
Hu Xianluo
Publication year - 2019
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201900055
Subject(s) - electrolyte , materials science , ionic conductivity , polyvinylidene fluoride , lithium (medication) , chemical engineering , electrochemistry , composite number , ceramic , battery (electricity) , polymer , conductivity , energy storage , lithium battery , lithium perchlorate , fabrication , composite material , ionic bonding , ion , electrode , organic chemistry , chemistry , power (physics) , physics , quantum mechanics , engineering , endocrinology , alternative medicine , pathology , medicine
Solid‐state electrolytes that can meet the requirements of high‐safety lithium batteries at high temperature aroused much attention in electrochemical energy storage.Nevertheless, the low ionic conductivity at ambient temperature and poor mechanical strength limit their practical applications. Through unitized configurationdesign, herein, a unique safe and flexible composite polymer electrolyte membrane comprising of inorganic ceramic particles (Li 6.75 La 3 Zr 1.75 Nb 0.25 O 12 , LLZNO), polyvinylidene fluoride (PVDF), and lithium perchlorate (LiClO 4 ) are fabricated. Benefitting from the strongly coupled effects via interfacial chemical reactions and the synergistic effects between LLZNOand PVDF, the LLZNO‐based composite electrolyte wetted by ionic liquid exhibits a high ionic conductivity of 1.5 × 10 −3 S cm −1 at 25 °C. Moreover, the electrolyte is able to be thermally stable at relatively high temperatures. A LiFePO 4 (+) // Li (−) lithium battery using the as‐prepared LLZNO‐based composite electrolyte achieves a good electrochemical stability at ambient temperature, 80 °C and even 120 °C. This work provides an effective way to the fabrication of high‐performance, flexible electrolyte membranes for lithium batteries and other energy‐storage devices that are capable of working over a wide range of temperatures