ELECTRICITY SUPPLY ELEMENT AND CERAMIC SEPARATOR THEREOF

摘要

An electricity supply element and the ceramic separator thereof are provided. The ceramic separator is adapted to separate two electrode layers of the electricity supply element for permitting ion migration and electrical separation. The ceramic separator is made of ceramic particulates and the adhesive. The adhesive employs dual binder system, which includes linear polymer and cross-linking polymer. The adhesion and heat tolerance are enhanced by the characteristic of the two type of polymers. The respective position of the two electrode layers are maintained during high operation temperature to improve the stability, and battery performance. Also, the ceramic separator enhances the ion conductivity and reduces the possibility of the micro-short to increase practical utilization.

主权项

1. An electricity supply element, comprising:
a first electrode substrate, including a first current collector layer and a first active material layer, wherein the first current collector layer includes a first surface and a second surface opposed each other, the first active material layer is disposed on the first surface of the first current collector layer; a second electrode substrate, including a second current collector layer and a second active material layer, wherein the second current collector layer includes a first surface and a second surface opposed each other, the second active material layer is disposed on the first surface of the second current collector layer; and a ceramic separator, disposed between the first electrode substrate and the second electrode substrate and composed of a plurality of ceramic particulates and a dual binder system thereon, wherein the percentage of the ceramic particulates by the dual binder system is more than 60% and the dual binder system includes a linear polymer and a cross-linking polymer; wherein the cross-linking polymer of the dual binder system is a ladder cross-linking polymer with ladder structure, including polyimide (PI) and the derivatives thereof.