Rolling Device Protrusions for Solid Electrode Adhesion
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Solution Overview
Problem
All-solid secondary batteries face challenges in uniformly reducing electrode sheet thickness and enhancing adhesion and contact between the solid electrolyte and electrode active materials, leading to reduced rate capability due to high interfacial resistance.
Innovation Solution
A rolling device with rollers featuring protrusions and gas receiving portions is used to uniformly compress and roll the electrode sheet, improving contact between the solid electrolyte and electrode active materials, thereby reducing interfacial resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional smooth rollers are used for compression, then the electrode sheet can be processed, but uniform thickness reduction and adhesion enhancement are insufficient
Solution Approach 1:
The roller surfaces are equipped with protrusions that create localized compression zones. These protrusions concentrate the rolling force on specific points, enabling both uniform overall compression and enhanced local adhesion between the solid electrolyte and electrode active materials, thereby resolving the contradiction between manufacturing precision and reliability.
2Manufacturing precision
If high compression force is applied to reduce thickness uniformly, then thickness uniformity improves, but adhesion and contact between solid electrolyte and electrode active material may not be sufficiently enhanced
Solution Approach 1:
The protrusions on the roller surfaces create localized high-compression zones that simultaneously achieve uniform overall thickness reduction and enhanced local adhesion. This distributed localized compression approach resolves the contradiction by ensuring both global uniformity and local contact quality.
Solution Approach 2:
The invention transitions from uniform surface compression to multi-point localized compression through protrusions. This dimensional change in the compression interface enables simultaneous achievement of thickness uniformity and interfacial adhesion enhancement, addressing the contradiction between manufacturing precision and reliability.
3Device complexity
If smooth roller surfaces are used, then the structure is simple, but the adhesion and closeness of contact between solid electrolyte and electrode active material are insufficient
Solution Approach 1:
By adding protrusions to the roller surfaces, the invention creates localized high-compression zones that significantly enhance adhesion and contact quality between the solid electrolyte and electrode active materials, while maintaining relatively simple device structure.
4Ease of manufacture
If conventional rolling is used without protrusions, then the process is simple, but interfacial resistance between solid electrolyte and electrode active material remains high
Solution Approach 1:
The protrusions on the roller surfaces create localized compression zones that enhance interfacial contact and reduce interfacial resistance, improving rate capability while maintaining a relatively simple rolling process structure.
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
The solution effectively reduces interfacial resistance and enhances the rate capability of all-solid secondary batteries by ensuring uniform thickness reduction and increased adhesion of the electrode sheet post-coating.
Implementation Method 1
a first roller including a plurality of first protrusions protruding from a surface of the first roller; and a second roller, opposite the first roller; and a second roller opposite the first roller, wherein the second roller includes a plurality of second protrusions protruding from a surface of the second roller
Data Source
AI summary
A rolling device for an electrode including an all-solid electrolyte layer, the rolling device including: a first roller including a plurality of first protrusions protruding from a surface of the first roller; and a second roller opposite the first roller, wherein the second roller comprises a plurality of second protrusions on a surface of the second roller.