Solid Electrolyte Membrane Surface Energy Control
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Solution Overview
Problem
Existing methods for manufacturing solid electrolyte membranes often result in shape fluctuations and poor peelability, leading to damage and inefficiencies in secondary battery production.
Innovation Solution
A film-attached solid electrolyte membrane with a surface contact angle range of 35 to 75 degrees for acetonitrile and 15 to 40 degrees for chloroform, using a polymer compound with a mass average molecular weight of 10,000 or more and a lithium salt, which enhances mechanical strength, flexibility, and electrical conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a polymer solid electrolyte is coated on a PET film using conventional methods, then the solid electrolyte membrane is formed, but cissing occurs causing fluctuations in shape, thickness, and width
Solution Approach 1:
The invention changes the surface energy parameters of the PET film by controlling the contact angles with specific liquids (acetonitrile: 35-75 degrees, chloroform: 15-40 degrees). This parameter adjustment prevents cissing during coating while maintaining manufacturing simplicity, thereby resolving the contradiction between manufacturing precision and ease of manufacture.
2Ease of operation
If the solid electrolyte membrane is directly coated on the film, then the membrane is formed, but the membrane cannot be easily peeled off and is likely to be damaged
Solution Approach 1:
The invention adjusts the surface energy parameters of the PET film through controlled contact angles, creating an optimal balance between adhesion and release properties. This enables easy peeling of the solid electrolyte membrane without damage, resolving the contradiction between ease of operation and reliability.
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 solution effectively stabilizes the shape of the solid electrolyte membrane, improves peelability, and enhances the mechanical strength and electrical conductivity, making it suitable for high-energy density applications.
Implementation Method 1
a film comprising a surface having a contact angle with respect to acetonitrile in a range from 35 to 75 degrees and a contact angle with respect to chloroform in a range from 15 to 40 degrees
Data Source
AI summary
A film-attached solid electrolyte membrane includes: a film having a surface that has a contact angle with respect to acetonitrile in a range from 35 to 75 degrees and a contact angle with respect to chloroform in a range from 15 to 40 degrees; and a solid electrolyte membrane in contact with the surface of the film. A manufacturing method of a film-attached solid electrolyte membrane includes: coating a solid-electrolyte-membrane-forming composition on a surface of a film that has a contact angle with respect to acetonitrile in a range from 35 to 75 degrees and a contact angle with respect to chloroform in a range from 15 to 40 degrees; and curing the coated solid-electrolyte-membrane-forming composition to form a solid electrolyte membrane.