Method for constructing gradient niobium titanium oxygen sulfide negative electrode material through two-step hydrothermal method and application of gradient niobium titanium oxygen sulfide negative electrode material
The preparation of gradient niobium sulfide titanium oxide material through two-step hydrothermal method solved the problem of low electronic and ion conductivity of niobium titanium oxide negative electrode material in lithium-ion hybrid capacitors, and achieved improvement in material rate performance and electrochemical performance.
CN119683683APending Publication Date: 2025-03-25CHINA DATANG GRP TECH INNOVATION CO LTD +1
0 Cites 0 Cited by
Patent Information
- Application Number
- CN202411873189.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-18
- Publication Date
- 2025-03-25
AI Technical Summary
Technical Problem
The electronic and ionic conductivity of niobium titanium anode material in lithium-ion hybrid capacitors is low, limiting its application in lithium-ion batteries and hybrid capacitors.
Method used
A two-step hydrothermal method is used to prepare gradient niobium sulfide titanium oxide materials. By precisely controlling the vulcanization process, the sulfur atom gradient replaces oxygen atoms to form a material with rich heterogeneity of oxidative components, thereby improving electron and ionic conductivity.
Benefits of technology
It significantly improves the rate performance and electrochemical performance of niobium titanium oxide materials, and improves the comprehensive performance of lithium-ion hybrid capacitors.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention discloses a method for constructing a gradient sulfide niobium-titanium-oxygen negative electrode material through two-step hydrothermal and application of the gradient sulfide niobium-titanium-oxygen negative electrode material, according to the method, a conventional niobium-titanium-oxygen material precursor is prepared through a hydrothermal method, then a sulfur source K2S is added for secondary hydrothermal treatment, and finally the gradient sulfide niobium-titanium-oxygen material is obtained through high-temperature annealing. According to the preparation method, the gradient sulfide niobium-titanium-oxygen hybrid capacitor negative electrode material is prepared through a two-step hydrothermal method, the concentration and duration of hydrothermal vulcanization are finely controlled, sulfur atoms replace part of oxygen atoms to different degrees, the electron transfer rate and the lithium ion de-intercalation rate of the niobium-titanium-oxygen material are increased, and the rate performance is greatly improved. The gradient sulfide niobium-titanium-oxygen hybrid capacitor negative electrode material prepared by the method can be used in the field of high-power and high-specific-energy niobium-titanium-oxygen-based lithium ion hybrid capacitors.
Need to check novelty before this filing date? Find Prior Art