Journal of Inorganic Materials ›› 2021, Vol. 36 ›› Issue (3): 332-336.DOI: 10.15541/jim20200206

• RESEARCH LETTERS • Previous Articles    

MOF/Poly(Ethylene Oxide) Composite Polymer Electrolyte for Solid-state Lithium Battery

LIANG Fengqing1,2(), WEN Zhaoyin1,2()   

  1. 1. CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
    2. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2020-04-20 Revised:2020-05-05 Published:2021-03-20 Online:2020-05-20
  • Contact: WEN Zhaoyin, professor. E-mail: zywen@mail.sic.ac.cn
  • About author:LIANG Fengqing(1994-), female, Master candidate. E-mail: liangfengqing@student.sic.ac.cn
  • Supported by:
    National Key R&D Program of China(2018YFB0905400);National Natural Science Foundation of China(51772315);Science and Technology Commission of Shanghai Municipality(18DZ2280800)

Abstract:

Solid polymer electrolytes (SPEs) with high flexibility and processability enable the fabrication of leak-free solid-state batteries with varied geometries. However, SPEs usually suffer from low ionic conductivity and poor stability with lithium metal anodes. Here, we propose nano-sized metal-organic framework (MOF) material(UiO-66) as filler for poly(ethylene oxide) (PEO) polymer electrolyte. The coordination of UiO-66 with oxygen in PEO chain and the interaction between UiO-66 and lithium salt significantly improve the ionic conductivity (3.0×10 -5 S/cm at 25 ℃, 5.8×10 -4 S/cm at 60 ℃) and transference number of Li + (0.36), widen the electrochemical window to 4.9 V (vs Li +/Li), enhance the stability with lithium metal anode. As a result, the as-prepared Li symmetrical cells can continuously operate for 1000 h at 0.15 mA?cm -2, 60 ℃. The results show that UiO-66 filler is effective to improve the electrochemical performance of polymer electrolyte.

Key words: composite electrolyte, poly(ethylene oxide), metal-organic framework material, lithium metal battery

CLC Number: