| 摘要 |
PURPOSE:To improve bromine barrier performance while maintaining a film electric resistance so as to prevent the self discharge of battery and to improve coulomb and energy efficiencies by composing a separator of a fine porous film having a specified fine pore distribution. CONSTITUTION:This separator for metal halogen battery is composed of a fine porous film capable of patitioning a positive electrolyte from a negative electrolyte and preventing the transmission of halogen molecules, wherein the porousity of the film is 45-50%, the volume of fine pores is 750-850mm<3>/g and the radius of average pore is 1.5-2.0X10A. By using such separator, it is possible to effectively prevent the dispersion of halogen molecules generated at a positive electrode into a negative chamber through the separator. It is thus possible to effectively restrain the self discharge of battery while a film electric resistance is maintained and therefore to enhance the coulomb and energy efficiencies of metal halogen battery. |
