Sodium Supplement Material With Exposed Catalyst-Conductive Particles
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Solution Overview
Problem
In composite sodium supplement materials, the sodium supplement agent, conductive agent, and catalyst typically separate upon addition to the positive active material, hindering conductive and catalytic effects, which limits the practical sodium supplementation efficacy.
Innovation Solution
A sodium supplement material is designed with a sodium supplement agent body and first particles, including conductive and catalyst particles, where the first particles are partially encapsulated and partially exposed, controlled within specific ranges to enhance electron transport and catalytic activity, formed by melting and cooling a sodium supplement agent raw material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If sodium supplement agent, conductive agent, and catalyst are physically mixed, then the material composition is simple, but the components separate upon addition to positive active material, hindering conductive and catalytic effects
Solution Approach 1:
The patent merges the sodium supplement agent, conductive agent, and catalyst into a single integrated spherical particle structure. The conductive agent and catalyst are embedded within the sodium supplement agent matrix, ensuring they remain together as a unified composite particle when added to the positive active material, thereby preventing separation and maintaining both conductive and catalytic effects.
Solution Approach 2:
The patent creates a composite material where the sodium supplement agent forms the matrix and the conductive agent and catalyst are dispersed within it. This composite structure ensures that all three components work synergistically while maintaining their individual functions, resolving the contradiction between manufacturing simplicity and functional reliability.
2Stability of the object's composition
If conductive agent particles and catalyst particles are fully encapsulated by sodium supplement agent body, then the structure is stable, but the conductive and catalytic effects are reduced
Solution Approach 1:
The patent applies local quality by creating a gradient structure where the conductive agent and catalyst are not uniformly distributed but rather concentrated in specific regions of the spherical particle. The embedding depth and distribution are controlled to ensure that portions of these functional particles remain exposed on the surface, providing both structural stability and adequate conductive/catalytic activity.
Solution Approach 2:
The patent uses partial encapsulation rather than complete encapsulation of the conductive agent and catalyst particles. This partial action allows the sodium supplement agent body to provide structural stability while leaving sufficient portions of the conductive and catalytic particles exposed to maintain their functional effects.
3Reliability
If the number of first particles exposed on surface is increased, then the catalytic activity is enhanced, but the oxidative decomposition potential decreases
Solution Approach 1:
The patent optimizes the parameter of exposed first particles by controlling the embedding depth and surface exposure during the formation process. By adjusting this parameter, the patent achieves a balance where sufficient catalytic activity is provided through exposed particles while the overall oxidative decomposition potential is maintained at an appropriate level for battery operation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration improves the oxidative decomposition potential, enhancing the first-cycle sodium supplementation performance and energy density of sodium-ion batteries.
Implementation Method 1
during calcination, the sodium supplement agent raw material melts
Implementation Method 2
During cooling, the sodium supplement agent raw material solidifies
Implementation Method 3
the sodium supplement agent raw material solidifies and precipitates using the conductive agent particles as a skeleton
Data Source
Figure 1~2
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AI summary
The present disclosure provides a sodium supplement material, its preparation method, positive eletrode plate, and sodium-ion battery. The sodium supplement material includes a sodium supplement agent body and first particles exposed on the surface of the sodium supplement agent body. In any 300 nm × 200 nm region on the surface of the sodium supplement material, the number of first particles ranges from 2 to 20. The first particles include one or more conductive agent particles and one or more catalyst particles.