Nitrogen-doped bismuth/carbon composite microsphere material and preparation method and application thereof

• Main Authors: CHEN HUIXIN, ZHANG QIAOBAO, PAN JIANHAI, SUN ZHEFEI
• Format: Patent
• Language: Chinese; English
• Published: 18.04.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention discloses a nitrogen-doped bismuth/carbon composite microsphere material and a preparation method and application thereof, the nitrogen-doped bismuth/carbon composite microsphere material comprises a micron carbon sphere matrix material, a plurality of nano bismuth particles are uniformly embedded in micron carbon spheres, and each nano bismuth particle is tightly wrapped by a carbon matrix to form a compact bismuth/carbon composite sphere and a nitrogen-doped structure; due to the compact spherical structure of the nitrogen-doped bismuth/carbon composite microsphere material, the compact combination mode of bismuth and carbon and the doping of the nitrogen element, when the nitrogen-doped bismuth/carbon composite microsphere material is applied to a sodium ion battery, the volume expansion of the material can be effectively relieved, the carrier transmission rate is increased, and the charging and discharging time is shortened. The invention provides a preparation method of a nitrogen-doped bis