关键词: 胶体, 电解质, 凝胶, 表面活性剂, 聚乙烯醇

Abstract: To improve the physical properties and electrochemical performance of gel electrolyte，gel electrolytes with different contents of polyving alcohol（PVA）were prepared. Test results of viscosity，strength and gelling time tests showed that viscosity was increased with increasing PVA content and increased significantly when the content was over 0.0050%. Gel strength was enhanced and gelling time was prolonged when adding PVA of 0.0025% and 0.0050%，and gel performance was improved. However，physical properties of the electrolyte could not be improved，when the content of PVA was further increased. Cyclic voltammetry and AC impedance spectroscopy test results showed that adding PVA of 0.0050% could improve the reaction current and power of electrode，increase the utilization of active material and oxygen evolution potential，suppress self-discharge and lower impedance of electrolyte，electrochemical reaction charge transfer resistance and capacitance.

Key words: colloid, electrolytes, gels, surfactants, polyving alcohol（PVA）