Study of hyperbranched poly(glycidol) sulfate electrolyte

✍ Scribed by Yang Xiaohui; Sun Xiaoying; Chen Jianjun; Liu Yunhang; Wang Xinling

• Publisher: John Wiley and Sons
• Year: 2003
• Tongue: English
• Weight: 220 KB
• Volume: 90
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.12531

✦ Synopsis

Abstract

Hyperbranched poly(glycidol) alkali sulfate (SHPG‐M) was prepared based on hyperbranched poly(glycidol). Polyurethane–hyperbranched poly(glycidol) (PU–SHPG‐M) sulfate electrolyte is a kind of single ionic or cationic conducting polymer electrolyte. Such a single ionic polymer electrolyte can obviously reduce the polarization and has little decay of direct current (DC) conductivity. SHPG‐M was characterized by Fourier transform infrared (FTIR), differential scanning calorimetry (DSC), scanning electron microscopy (SEM), atomic force microscopy (AFM) and impedance analysis. The optimum conductivity is ∼3 × 10^−6^ S·cm^−1^, with 30–40% SHPG‐M in the polymer electrolyte at room temperature. The species of cation greatly effects the ionic conductivity of the polymer electrolyte; that is, σ~SHPG‐Li~ > σ~SHPG‐Na~ > σ~SHPG‐K~, with same SHPG‐M content in the polymer electrolyte. The ionic conductivity increases with an increase of temperature, and the dependence of ionic conductivity on temperature fits the Arrhenius equation well. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 1185–1190, 2003