Diaphragm and preparation method thereof, battery and electric device

• Main Authors: ZHUANG ZHI, CHENG YUE, BAO JINZHEN, QI JIAPENG, CAI YUHONG, SU XIAOMING, CHOI YEO-OK
• Format: Patent
• Language: Chinese; English
• Published: 02.08.2024
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention relates to the technical field of batteries, in particular to a diaphragm, a preparation method, a battery and a power utilization device. The separator includes a base film. The base film is provided with a first surface and an opposite second surface; the first surface is provided with a solid electrolyte layer; an adhesive layer is arranged on the second surface; the solid electrolyte layer completely covers the first surface; the adhesive layer covers a partial area of the second surface. According to the scheme, the solid electrolyte layer completely covers the first surface, an in-situ curing reaction can be carried out at a negative electrode (low potential) of the battery, and adhesion of a molecular level with a negative electrode interface is generated under the action of electrolyte and Li atoms, so that the space utilization rate in the battery is improved, and the use amount of the electrolyte in the battery is reduced. And the adhesive layer covers partial area of the second surfac