Anode Electrode Slurry Suspending Agent for High-Speed Coating
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Solution Overview
Problem
The rapid coating process of anode electrode slurries in power battery production leads to drying-cracking of the anode electrode film, which affects the quality and safety of the batteries, and existing solutions using plasticizers can cause corrosion and deteriorate battery performance.
Innovation Solution
An anode electrode slurry suspending agent with a specific structural formula, containing a main chain with carbon and side chains with functional groups that enhance suspension stability and flexibility, preventing drying-cracking and improving coating speed without compromising battery performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the coating speed is increased to 50 m/min or more, then the productivity is improved, but the drying-cracking phenomenon of the anode electrode film becomes more obvious
Solution Approach 1:
The patent changes the chemical composition parameters of the anode electrode slurry by introducing a specific suspending agent with unique molecular structure (containing carboxymethyl groups and polyacrylonitrile). This parameter change in the slurry formulation enables the film to maintain integrity at high coating speeds of 50 m/min or more, resolving the drying-cracking issue while preserving high productivity
Solution Approach 2:
The patent creates a composite suspending agent system combining carboxymethyl cellulose and polyacrylonitrile in specific ratios. This composite material provides synergistic effects where the carboxymethyl groups enhance suspension stability and the polyacrylonitrile contributes to film flexibility, allowing high-speed coating without drying-cracking
2Manufacturing precision
If plasticizer is added to the anode electrode slurry to prevent drying-cracking, then the coating quality is improved, but the battery performance deteriorates due to corrosion and side reactions
Solution Approach 1:
The patent extracts and eliminates the harmful plasticizer component from the slurry formulation while retaining the beneficial function of preventing drying-cracking. By removing plasticizers and replacing them with the safe suspending agent system, the patent achieves both high coating quality and maintained battery performance without corrosion or side reactions
Solution Approach 2:
The patent introduces the suspending agent as an intermediary substance that mediates between the slurry and the drying process. This intermediary provides suspension stability and film flexibility during high-speed coating without the harmful side effects of plasticizers, acting as a safe alternative that achieves the same protective function
Data Source
AI summary
The present disclosure provides an anode electrode slurry suspending agent, an anode electrode plate and an energy storage device, the anode electrode slurry suspending agent has a structural formula composed of a main chain containing carbon and a side chain, the side chain comprises a first side chain R1 and a second side chain R2; the first side chain R1 contains —R11—CONH2, the second side chain R2 contains —(C═O)OR21 or —O(C═O)R22, the anode electrode slurry suspending agent can significantly improve coating speed of the anode electrode slurry and can ensure that there is no drying-cracking phenomenon of the anode electrode film at the same time, thereby improving productivity and quality rate of coating process of the anode electrode plate and in turn significantly improving production capacity of the energy storage device.