Metal particle doped self-supporting carbon-based material and preparation method and application thereof

By preparing self-supporting base materials doped with metal particles in sodium ion batteries, the problems of low discharge capacity and poor circulation performance of sodium ion batteries are solved, and the effects of high discharge capacity and good circulation performance are achieved.

CN119650624APending Publication Date: 2025-03-18SHANGHAI XUANYI NEW ENERGY DEV CO LTD
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Patent Information

Application Number
CN202411717903.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-27
Publication Date
2025-03-18

AI Technical Summary

Technical Problem

The existing sodium ion batteries have low discharge capacity and poor circulation performance, making it difficult to reach a level comparable to lithium ion batteries.

Method used

By preparing self-supported carbon-based materials doped with metal particles, electrospinning technology is used to prepare carbon-based material precursors, and the load of metal element particles is significantly improved through preoxidation and calcination processes, improving the conductivity and sodium ion storage capacity of the material.

Benefits of technology

It significantly improves the discharge capacity and cycling performance of sodium ion batteries, reduces the increase in unnecessary weight in the device, and reduces the manufacturing cost. It is suitable for large-scale development and application of sodium ion batteries.

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Abstract

The invention provides a metal particle doped self-supporting carbon-based material as well as a preparation method and application thereof. The metal particles comprise metal elementary substance particles, and in the self-supporting carbon-based material doped with the metal particles, the loading capacity of the metal elementary substance particles is 15-55 wt%; the preparation method comprises the following steps: firstly, mixing a polymer, metal salt and a solvent, and preparing a carbon-based material precursor through electrostatic spinning; then sequentially carrying out pre-oxidation and calcination on the carbon-based material precursor; wherein the types of metal salts and the conditions of pre-oxidation and calcination are defined. According to the preparation method, by limiting the gas components in the calcination process and the temperature and time ranges in the pre-oxidation and calcination processes, the loading capacity of the metal elementary substance particles is remarkably improved, the precursor is fully carbonized to form the carbon fibers, and the prepared self-supporting carbon-based material is good in discharge capacity and cycle performance.
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