Solid-State Battery Hygroscopic Layering for Moisture Blocking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing all-solid-state and secondary batteries face reliability issues due to moisture ingress, as moisture-absorbing materials are typically located outside the battery elements, leading to reduced energy density, capacity density, and complex manufacturing processes.
Innovation Solution
Incorporating a hygroscopic material within the battery's electrodes and solid electrolyte layer, allowing it to contact the side surfaces, effectively absorbs moisture and prevents its diffusion, thereby enhancing battery reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If moisture-absorbing materials are disposed outside the battery element between the battery element and the casing, then moisture absorption function is provided, but energy density and capacity density are reduced and manufacturing process becomes complex
Solution Approach 1:
The hygroscopic material is integrated within the battery element structure itself, specifically in the solid electrolyte layer and/or electrode layers, rather than being disposed outside as a separate component. This merging of the moisture absorption function into the existing battery components eliminates the need for additional external moisture-absorbing materials, thereby maintaining energy density and capacity density while providing effective moisture protection.
Solution Approach 2:
The hygroscopic material is nested within the layered structure of the battery element, incorporated into the solid electrolyte layer and/or electrode layers. This nested configuration allows the moisture absorption function to be embedded within the battery's internal structure, utilizing the existing space and components rather than adding external elements that would reduce energy density.
2Reliability
If moisture-absorbing materials are disposed outside the battery element between the battery element and the casing, then moisture absorption function is provided, but manufacturing process becomes complex
Solution Approach 1:
The moisture absorption function is merged with the existing battery component manufacturing process. The hygroscopic material is incorporated into the solid electrolyte layer and/or electrode layers during their formation processes, eliminating the need for separate assembly steps for installing external moisture-absorbing materials. This integration simplifies the overall manufacturing process while ensuring reliable moisture protection.
3Reliability
If hygroscopic material is contained within the battery element in contact with side surfaces, then moisture diffusion is prevented, but structural complexity increases
Solution Approach 1:
The hygroscopic material is selectively incorporated into specific regions of the battery element where moisture ingress is most likely to occur, such as the solid electrolyte layer and electrode layers that are in contact with the atmosphere. This localized placement provides effective moisture diffusion prevention without requiring the entire battery structure to be redesigned, thereby minimizing structural complexity.
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
This configuration improves battery reliability by reducing moisture-induced degradation and simplifying the manufacturing process, while maintaining or enhancing energy and capacity densities.
Implementation Method 1
a hygroscopic material, wherein the hygroscopic material is contained in at least one selected from the group consisting of the first electrode, the second electrode, and the solid electrolyte layer, and the hygroscopic material is in contact with a side surface of the at least one selected from the group consisting of the first electrode, the second electrode, and the solid electrolyte layer
Data Source
AI summary
A battery according to the present disclosure comprises a first electrode, a second electrode, a solid electrolyte layer disposed between the first electrode and the second electrode, and a hygroscopic material, wherein the hygroscopic material is contained in at least one selected from the group consisting of the first electrode, the second electrode, and the solid electrolyte layer, and the hygroscopic material is in contact with a side surface of the at least one selected from the group consisting of the first electrode, the second electrode, and the solid electrolyte layer.