Solid-State Battery Resin Film for Moisture and Gas Absorption
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Solution Overview
Problem
Water vapor can enter all-solid-state batteries, leading to the generation of gases like hydrogen sulfide when moisture contacts the solid electrolyte, which can increase internal pressure and compromise battery performance.
Innovation Solution
Incorporating a resin film that acts as a water and gas absorbent to prevent moisture contact with the solid electrolyte and absorb any generated gases, ensuring the film is in contact with at least part of the solid electrolyte, positive electrode layer, and negative electrode layer, and can be shaped as a frame surrounding the electrolyte.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If water vapor enters the battery case, then moisture contacts the solid electrolyte, but gas such as hydrogen sulfide is generated which increases internal pressure
Solution Approach 1:
A resin film containing water absorbent and gas absorbent is introduced as an intermediary component between the external environment and the solid electrolyte. The water absorbent in the resin film captures water vapor before it reaches the solid electrolyte, while the gas absorbent captures any gas generated from moisture contact, preventing internal pressure increase
Solution Approach 2:
The resin film performs preliminary absorption of water vapor and generated gas before these substances can contact the solid electrolyte and cause harmful reactions. By pre-capturing water vapor in the resin film, the system prevents the chemical reaction that would generate gas and increase pressure
2Reliability
If the resin film contains water absorbent and gas absorbent, then moisture contact and gas absorption are improved, but device complexity increases
Solution Approach 1:
The resin film merges multiple functional components into a single integrated structure. Both the water absorbent and gas absorbent are incorporated into the same resin film matrix, allowing simultaneous moisture capture and gas absorption functions in one component rather than requiring separate layers or structures
Solution Approach 2:
The resin film serves multiple protective functions simultaneously: it acts as a water vapor barrier, a gas absorption medium, and an internal pressure control mechanism. This multi-functionality reduces the need for additional separate components, offsetting the complexity of the resin film composition
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 resin film effectively prevents moisture contact and absorbs generated gases, maintaining battery integrity and performance by reducing internal pressure and gas release.
Implementation Method 1
the resin film for all-solid-state batteries contains at least one of a water absorbent and a gas absorbent
Implementation Method 2
the resin film for all-solid-state batteries contains at least one of a water absorbent and a gas absorbent
Data Source
Figure 1~2
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AI summary
This all-solid-state battery is provided with a solid electrolyte and a resin film for all-solid-state batteries, the resin film being disposed so as to be in contact with at least a part of the solid electrolyte; and the resin film for all-solid-state batteries contains at least one of a water absorbent and a gas absorbent.