公开(公告)号：US10103373B2

公开(公告)日：2018-10-16

申请号：US14762716

申请日：2013-01-23

Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGY

Inventor： Jian Hu ,  Jin Long ,  Xiwen Wang

IPC: H01M2/16 ,  H01M2/14 ,  D21H21/16 ,  D21H25/02 ,  D21H25/14 ,  D21H27/38

Abstract: Diaphragm paper, and a preparation method and an application thereof. The diaphragm paper comprises a first layer, a second layer, and a third layer, wherein the second layer is located between the first layer and the third layer; the first layer and the third layer are loose layers, of which the average aperture is larger than 10 μm and the basis weight is 5 to 30 g/m2; and the second layer is a compact layer, of which the average aperture is smaller than 5 μm and the basis weight is 2 to 15 g/m2. The compact layer has small aperture and good insulating performance, and is capable of effectively insulating a positive electrode and a negative electrode. The loose layers have good liquid permeability and electrolyte absorptivity, and can guarantee the discharge performance of a battery. The material is further advantageous in having good dimensional stability and being thin, so that a battery can achieve high capacity.