Alkaline Electrode Slurry for Sodium Battery Coating Adhesion
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Solution Overview
Problem
Current sodium-ion batteries face challenges with adhesion of electrode coatings to current collectors, cycle life, and overall performance, which are not adequately addressed by existing technologies.
Innovation Solution
A sodium battery electrode coating material and slurry composition are developed, comprising electrode active materials, binders, alkaline additives, and optionally conductive agents. The alkaline additive, selected from various metal compounds, is added to enhance pH and improve adhesion and performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional electrode coatings are used without alkaline additives, then the manufacturing process is simple, but the adhesion of electrode coating to current collector is poor
Solution Approach 1:
The patent applies parameter changes by modifying the pH of the slurry composition through the addition of alkaline additives. This changes the chemical environment during electrode coating formation, enhancing adhesion strength without fundamentally altering the coating structure or requiring complex manufacturing process changes.
Solution Approach 2:
The alkaline additive acts as an intermediary substance that mediates between the electrode active material and the current collector. It facilitates improved adhesion by creating favorable chemical conditions at the interface during the coating formation process, without becoming part of the final electrode structure itself.
2Duration of action of stationary object
If conventional electrode coatings are used without alkaline additives, then the manufacturing process is straightforward, but the cycle life of the battery is limited
Solution Approach 1:
The patent uses parameter changes by adjusting the pH parameter of the slurry composition through alkaline additives. This modification improves the stability and performance of the electrode coating over repeated charge-discharge cycles, extending battery cycle life while maintaining a relatively simple additive-based approach.
3Reliability
If conventional electrode coatings are used, then the overall battery performance is moderate, but the adhesion to current collector is insufficient
Solution Approach 1:
The patent applies parameter changes by modifying the pH of the slurry composition through the addition of alkaline additives. This changes the chemical environment during electrode coating formation, enhancing adhesion strength without fundamentally altering the coating structure or requiring complex manufacturing process changes.
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 proposed solution enhances the adhesion of electrode coatings to current collectors, improves cycle life, and boosts the overall performance of sodium-ion batteries, making them more viable alternatives to lithium-ion batteries.
Implementation Method 1
enhance pH and improve adhesion and performance
Data Source
Figure 1~2
AI summary
The present invention relates to a slurry composition, and sodium battery electrode coating material comprising at least one electrode active material, at least one binder, at least one alkaline additive, and optionally at least one conductive agent, wherein said alkaline additive is selected from metal hydroxides, metal carbonates, metal bicarbonates, metal silicates, ammonia, metal amines, metal amides, metal hydrides, metal oxides, metal cyanides, or any combination thereof. The present invention further relates to electrodes, and batteries comprising said electrode active material or made of said slurry coating. The present invention further relates to methods of manufacturing the slurry composition, electrode coating material, electrodes, and batteries thereof.