Acta Phys. -Chim. Sin. ›› 2007, Vol. 23 ›› Issue (12): 1932-1936.doi: 10.3866/PKU.WHXB20071219

• ARTICLE • Previous Articles     Next Articles

Preparation and Characterization of γ-Ray Irradiated Gel Polymer Electrolyte for Lithium-Ion Polymer Batteries

SONG Zhao-Shuang; QI Lu; QIU Jing-Yi; MA Jian-Wei   

  1. College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China
  • Received:2007-09-17 Revised:2007-10-10 Published:2007-11-30
  • Contact: QI Lu

Abstract: The gel polymer electrolyte (GPE) based on PVDF-HFP and NPGDA network was prepared via γ-ray irradiation method. The structure, thermal stability and electrochemical performace of the GPE effected by irratiation dose were examined. The relationship between ionic conductivity and temperature followed Vogel-Tamman-Fulcher (VTF) equation, which suggested amorphous regions being dominant in GPE. The GPE irradiated at 5 kGy exhibited electrochemical stability up to 4.7 V vs Li/Li+ and high conductivity of 7.8×10-3 S·cm-1 at 25 ℃. In situ prepared LiMn2O4∣GPE∣Li cells exhibited good cycle performance, which provided a new approach to the fabrication of lithium-ion polymer batteries (LiPBs).

Key words: Gel polymer electrolyte, γ-ray irradiation, Cross-linking network, VTF equation