SECONDARY BATTERY AND ELECTRIC DEVICE

• Main Authors: ZENG, Chen, LIU, Liangbin, HE, Libing, WANG, Jiazheng, KANG, Meng
• Format: Patent
• Language: Chinese; English; French
• Published: 22.08.2024
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

Provided in the present application are a secondary battery and an electric device. The secondary battery comprises a negative electrode sheet, wherein the negative electrode sheet comprises a negative current collector and a negative membrane layer. The negative membrane layer is provided with a first surface away from the negative current collector and a second surface arranged opposite the first surface, wherein the thickness of the negative membrane layer is denoted by H; the region within a thickness range from the second surface of the negative membrane layer to 0.3H is a first region of the negative membrane layer, and the region within a thickness range from the first surface of the negative membrane layer to 0.3H is a second region of the negative membrane layer; and the first region comprises a first active material, the second region comprises a second active material, the first active material comprises a first silicon-based material, and the first silicon-based material comprises secondary partic