Silicon negative pole piece, battery and electronic equipment

• Main Authors: LIAN SHUANG, CAO HUI, YANG XIAOMENG, SUN YUYU, HOU MIN, LIU CHAN
• Format: Patent
• Language: Chinese; English
• Published: 28.05.2024
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention provides a silicon negative pole piece, a battery and electronic equipment, the negative pole piece comprises a negative active material layer, and the negative active material layer comprises a silicon material and graphite; the silicon material and the graphite meet a preset particle arrangement formula in the silicon negative electrode plate; wherein the expression of the preset particle arrangement formula is # imgabs0 # imgabs1 #, and x is the mass percent of the silicon material in the total mass of the silicon material and the graphite; d is Dv50 of the graphite; d is Dv50 of the silicon material; wherein the mass percentage of the silicon material in the total mass of the silicon material and the graphite is greater than or equal to 20%. According to the invention, the particle arrangement in the silicon negative pole piece is optimized by limiting the particle quantity relationship between the silicon material and the graphite, and a relatively low pole piece full lithium intercalation