Method of manufacturing a solid electrolyte membrane
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Solution Overview
Problem
Existing methods for manufacturing solid electrolyte membranes for all-solid-state batteries face challenges such as inferior electrical conduction, complex manufacturing processes, and environmental concerns due to the use of harmful solvents, along with durability and resistance issues.
Innovation Solution
A method involving the formation of a non-woven fabric using laser electrospinning technology, where a slurry containing solid electrolyte particles is applied and dried on the fabric, followed by pressing, to create a solid electrolyte membrane with improved characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a powder material is used to form the solid electrolyte, then the manufacturing process is simpler, but the electrical conduction becomes inferior due to small contact area between powders
Solution Approach 1:
The patent uses a composite structure combining binder resin and solid electrolyte particles. The binder resin forms a continuous matrix that provides electrical conduction pathways, while the solid electrolyte particles are dispersed within this matrix. This composite approach allows the use of powder materials to be manufactured simply while achieving superior electrical conduction through the resin network, resolving the contradiction between manufacturing simplicity and electrical performance.
2Ease of manufacture
If a powder material is used to form the solid electrolyte, then the manufacturing process is simpler, but the manufacturing process becomes more complicated due to difficulty in forming thin film sheets
Solution Approach 1:
The patent changes the physical state parameters of the solid electrolyte material from loose powder to a formed sheet structure by incorporating it into a binder resin matrix. This parameter change allows the material to be processed into thin film sheets with controlled thickness and uniform composition, simplifying the manufacturing process while enabling precise control over the electrolyte layer geometry that would be difficult to achieve with loose powder alone.
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 approach enhances the electrical conduction and durability of the solid electrolyte membrane, simplifies the manufacturing process, and eliminates the use of harmful solvents, resulting in improved battery performance and safety.
Implementation Method 1
forming a non-woven fabric including ultrafine fibers obtained by laser electrospinning
Implementation Method 2
laser electrospinning technology
Implementation Method 3
a step of drying the slurry on the non-woven fabric by a heater
Data Source
AI summary
A method of manufacturing an all-solid-state battery and an apparatus for manufacturing the same are provided. The method of manufacturing the all-solid-state battery includes: (a) a step of forming a non-woven fabric having a fiber made of a resin; (b) a step of applying a slurry containing solid electrolyte particles onto the non-woven fabric; (c) a step of drying the slurry on the non-woven fabric by a heater; (d) a step of pressurizing the slurry on the non-woven fabric by a roller; (e) a step of forming a positive electrode member on one surface of the solid electrolyte membrane; and (f) a step of forming a negative electrode member on the other surface of the solid electrolyte membrane. The step (a) is a step of forming the non-woven fabric by making a resin containing a polar filler fibrous by a laser electrospinning method. By such a method, the all-solid-state battery (a laminated body of a positive electrode member, a solid electrolyte membrane, and a negative electrode member) can be efficiently manufactured.