Oxygen permeable membrane for air secondary battery, armouring material for air secondary battery and secondary battery

摘要

Provided is an oxygen permeable membrane for use in an air secondary battery, which excels in oxygen permeability, barrier performance to water, being capable of preventing electrolyte from leaking out. Such an oxygen permeable membrane includes a thermoplastic resin membrane and inorganic particles having pores having pore diameter of 10 Å or less contained in the thermoplastic resin membrane, in which the thermoplastic resin membrane has one surface on which hydrophobic treatment is effected.

主权项

1. An armouring material for use in an air secondary battery, comprising
an armouring sheet constituted by laminating an outer layer including heat-resistant resin film, a metal foil layer, and an inner layer including a thermoplastic resin film, being equipped with an opening part for taking oxygen in, perforating through the outer layer, the metal foil layer and the inner layer, and an oxygen-permeable membrane being joined to an inner layer side in an opening part periphery so as to cover the opening part, wherein the oxygen-permeable membrane is constituted from a thermoplastic resin membrane and inorganic particles having pores having pore diameter of 10 Å or less contained in the thermoplastic resin membrane, wherein the thermoplastic resin membrane has one surface on which hydrophobic treatment was effected, and the one surface of the thermoplastic resin membrane on which hydrophobic treatment was effected is directed to the armouring sheet side.