All-Solid-State Battery Electrode Stacking for Dry Contact Formation
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Solution Overview
Problem
Conventional all-solid-state batteries often fail to achieve sufficient charging and discharging due to inadequate contact between the solid electrolytic layer and the electrode layer, requiring pressurization or heating to maintain contact, which complicates the manufacturing process and battery usage.
Innovation Solution
A method involving slurry formation, application onto a current collector, stacking a solid electrolytic layer, and vacuum-drying to enhance the contact state between the solid electrolytic layer and the electrode layer, eliminating the need for pressurization or heating during charging and discharging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the solid electrolytic layer and electrode layer are manufactured separately and then stacked, then the manufacturing process is simple, but the contact state between layers is insufficient
Solution Approach 1:
The electrode slurry is applied onto the current collector before stacking the solid electrolytic layer, creating a preliminary bonded state that ensures good contact between layers during subsequent drying and firing processes
Solution Approach 2:
The manufacturing process merges the electrode formation and layer stacking into a single integrated sequence, where the slurry application and layer stacking occur together before drying, ensuring simultaneous contact establishment
2Manufacturing precision
If pressurization or heating is applied to improve contact state, then the contact between solid electrolytic layer and electrode layer is improved, but additional configuration and complexity are required
Solution Approach 1:
The contact state is established in advance during the manufacturing process through slurry application and stacking before drying, eliminating the need for post-manufacturing pressurization or heating mechanisms
Solution Approach 2:
The battery structure itself provides the necessary contact pressure through its own assembly configuration, eliminating the need for external pressurization devices or heating systems
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 improved contact state allows for efficient charging and discharging without additional mechanical stress, simplifying the battery configuration and operation.
Implementation Method 1
a step of forming an electrode layer by vacuum-drying the slurry on which the solid electrolytic layer is stacked
Data Source
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AI summary
A method of manufacturing an all-solid-state battery having an improved contact state between an electrode layer and a solid electrolytic layer and achieving charging/discharging without pressurization during use of the all-solid-state battery is provided. The means for this adopts a method of manufacturing an all-solid-state battery including: a step of forming slurry by kneading raw materials including an electrode active material; a step of applying the slurry onto a current collector; a step of stacking a solid electrolytic layer onto the applied slurry; and a vacuum-drying step of forming an electrode layer by vacuum-drying the slurry on which the solid electrolytic layer is stacked.