Sheet Electrode Film Forming Under Low Pressure
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Solution Overview
Problem
The manufacturing of electrodes for semi-solid state batteries involves applying a large load to the electrode material, which can lead to separation of solid and liquid components and difficulty in forming a film with a target thickness.
Innovation Solution
A manufacturing method that involves dispersing and arranging bulk substances of an electrode material with a concentration of solid components between 20% to 90% by volume on a support, and then combining these bulk substances using a molding member to form an electrode material film, while maintaining a constant distance and applying a pressure of 10 kPa to 500 kPa.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the electrode material is extruded under strong pressure to achieve the target thickness, then the film thickness precision is improved, but the solid and liquid components separate from each other
Solution Approach 1:
The electrode material is pre-heated before extrusion to reduce its viscosity and improve flowability. This preliminary thermal treatment allows the material to be extruded at lower pressures, preventing component separation while achieving the desired film thickness precision
Solution Approach 2:
The temperature of the electrode material is changed from ambient to elevated (50-150°C) before extrusion. This parameter change modifies the material's rheological properties, reducing viscosity and enabling extrusion at lower pressures that prevent solid-liquid component separation
2Manufacturing precision
If a large load is applied to the electrode material to achieve the target thickness, then the film density is improved, but the device size and strength requirements increase
Solution Approach 1:
The temperature of the electrode material is elevated to 50-150°C before extrusion, which reduces its viscosity and transforms it into a more fluid state. This parameter change enables the material to be formed at lower pressures using simpler, smaller devices while still achieving the desired film density
Solution Approach 2:
Thermal energy is introduced as an alternative to mechanical pressure for modifying the electrode material's properties. By heating the material to reduce viscosity, the need for high-pressure mechanical systems is reduced, allowing for simpler and smaller device design
3Stress or pressure
If the electrode material is extruded to have a larger thickness and then adjusted, then the extrusion pressure is reduced, but the load required for deformation with molding member increases
Solution Approach 1:
The temperature of the electrode material is elevated to 50-150°C, which reduces its viscosity and makes it more pliable. This thermal parameter change allows the material to be deformed with lower forces using the molding member, eliminating the need for high extrusion pressures while reducing the deformation load
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 method reduces the load applied to the electrode material, allowing for the efficient formation of a molded body for a sheet-like electrode with a target thickness, thereby improving the manufacturing process and product quality.
Implementation Method 1
combining the plurality of bulk substances dispersed and arranged on the support by a molding member to form an electrode material film on the support
Data Source
AI summary
Provided is a manufacturing method of a molded body for a sheet-like electrode, the manufacturing method including a step A of dispersing and arranging, on a support, a plurality of bulk substances of an electrode material which contains an electrode active material and an electrolytic solution and has a concentration of solid components of 20% by volume to 90% by volume; and a step B of combining the plurality of bulk substances dispersed and arranged on the support by a molding member to form an electrode material film on the support.