Premium
Preparation and application of poly(ethylene oxide)‐based all solid‐state electrolyte with a walnut‐like SiO 2 as nano‐fillers
Author(s) -
Li Xiaolong,
Yang Li,
Shao Dingsheng,
Luo Kaili,
Liu Lei,
Wu Zhenyu,
Luo Zhigao,
Wang Xianyou
Publication year - 2020
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.48810
Subject(s) - crystallinity , materials science , electrolyte , ethylene oxide , chemical engineering , electrochemistry , polymer , lithium ion battery , oxide , nanoparticle , battery (electricity) , lithium battery , lithium (medication) , composite material , ion , nanotechnology , organic chemistry , chemistry , electrode , ionic bonding , metallurgy , endocrinology , engineering , power (physics) , quantum mechanics , medicine , physics , copolymer
ABSTRACT Poly(ethylene oxide) (PEO) is one of the most promising candidates in polymer solid‐state electrolyte. However, the polymer matrix has a high degree of crystallinity and thus manifests low conductivity, which restricts its application in all solid‐state lithium‐ion battery. Herein, a new composite polymer electrolyte (PLWLS), which is comprised of PEO, LiClO 4 , and the independently synthetized walnut‐like SiO 2 (WLS) as nano‐fillers, is designed and prepared by the tape‐casting way. The optimum mass fraction of walnut‐like SiO 2 is determined by physical and electrochemical characterization. The result shows that the PLWLS‐15 with 15 wt % walnut‐like SiO 2 nanoparticles has a crystallinity of 13.7%. Similarly, the maximum tensile strength is improved greatly. The assembled all‐solid‐state lithium‐ion battery with LiFePO 4 /PLWLS‐15/Li exhibits a higher discharge capacity of 167 mAh g −1 at 0.1 C (1C = 170 mAh g −1 ) and 143 mAh g −1 at 0.5 C in first cycle, lower voltage polarization and better cycle performance. Therefore, adding nanoparticle into PEO‐based solid‐state electrolyte could effectively promote the mechanical property and electrochemical performance, and thus provide a possibility of application for PLWLS‐15 in next generation all solid‐state lithium battery. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137 , 48810.