Positive Electrode Slurry Additive for Stringiness Suppression
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing positive electrode slurry application processes suffer from stringiness at the application end point, leading to potential welding failures and reduced reliability, and require complex vibration generators that increase production costs and complicate the application apparatus.
Innovation Solution
Incorporating a compound with a polyether group and an acidic group, such as a polyether acid, into the positive electrode slurry to suppress stringiness, allowing for intermittent application without the need for additional vibration generators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a vibration generator is installed in the application apparatus to suppress stringiness, then stringiness at the application end point is reduced, but the device complexity and production cost increase
Solution Approach 1:
The patent replaces the mechanical vibration generator system with a chemical solution by incorporating a specific compound into the positive electrode slurry. This compound contains functional groups that interact with the slurry components to suppress stringiness through chemical or physical-chemical mechanisms, eliminating the need for complex mechanical vibration equipment while achieving the same effect of preventing stringiness at the application end point
Solution Approach 2:
The patent changes the chemical composition parameters of the positive electrode slurry by adding a compound with specific functional groups. This parameter change in the slurry formulation enables stringiness suppression without requiring changes to the application apparatus structure or operation, thereby resolving the contradiction between reliability improvement and device complexity
2Reliability
If a vibration generator is installed to suppress stringiness, then application quality is improved, but production cost increases
Solution Approach 1:
The patent substitutes the expensive mechanical vibration generator system with a cost-effective chemical additive approach. By incorporating a compound containing specific functional groups into the slurry, the patent achieves stringiness suppression and improved application quality without the high capital investment and operational costs associated with vibration equipment
Solution Approach 2:
The patent uses a inexpensive chemical compound as an additive in the slurry formulation to achieve stringiness suppression. This approach is more economically viable than installing and maintaining expensive vibration generators, as the chemical additive can be easily incorporated into the existing slurry preparation process without requiring additional expensive equipment
3Manufacturing precision
If vibration generation is used to suppress stringiness, then application precision is improved, but operation complexity increases
Solution Approach 1:
The patent replaces the complex operational requirements of vibration generation (turning on/off, adjusting vibration levels, timing control) with a simple chemical formulation approach. The compound with specific functional groups is incorporated into the slurry during preparation, and no additional operational steps or adjustments are needed during the application process, thereby improving manufacturing precision while maintaining ease of operation
Data Source
AI summary
A positive electrode slurry including a positive electrode material mixture and a dispersion medium for dispersing the positive electrode material mixture. The positive electrode material mixture contains a positive electrode active material, an electrically conductive agent, a binder, and an additive. The additive includes a compound intramolecularly having a polyether group and an acidic group.