Enhanced Separator Design for Reliable Non-Aqueous Batteries
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Summary
Problems
Existing methods for manufacturing non-aqueous secondary batteries face challenges in achieving strong adhesion between the electrode and separator, leading to potential peeling issues during electrolyte impregnation, which can cause short circuits and affect battery stability.
Innovation solutions
A separator with a heat-resistant porous layer containing aromatic resin and inorganic particles, combined with an adhesive layer featuring phenyl group-containing acrylic type resin particles, is used to enhance adhesion through both dry and wet heat press methods, ensuring strong bonding and preventing peeling.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If dry heat press is used to bond electrode to separator, then manufacturing yield is improved and displacement is reduced, but adhesion strength deteriorates when impregnated with electrolytic solution
Why choose this principle:
The adhesive layer uses phenyl group-containing acrylic type resin particles that change their adhesive properties based on the presence of electrolytic solution. The resin particles are designed to exhibit sufficient adhesion during dry heat press manufacturing, then develop enhanced adhesion strength after impregnation with electrolytic solution through swelling and softening effects
Principle concept:
If dry heat press is used to bond electrode to separator, then manufacturing yield is improved and displacement is reduced, but adhesion strength deteriorates when impregnated with electrolytic solution
Why choose this principle:
The separator comprises a composite structure with a heat-resistant porous layer containing aromatic resin and inorganic particles, combined with an adhesive layer containing phenyl group-containing acrylic type resin particles. This composite structure provides both manufacturing process stability and long-term adhesion reliability
Application Domain
Data Source
AI summary:
A separator with a heat-resistant porous layer containing aromatic resin and inorganic particles, combined with an adhesive layer featuring phenyl group-containing acrylic type resin particles, is used to enhance adhesion through both dry and wet heat press methods, ensuring strong bonding and preventing peeling.
Abstract
A separator for a non-aqueous secondary battery, the separator including a heat-resistant porous layer that contains an aromatic type resin and inorganic particles, and an adhesive layer that is provided on the heat-resistant porous layer, and that contains adhesive resin particles having a phenyl group-containing acrylic type resin, in which the adhesive resin particles having a phenyl group-containing acrylic type resin are adhered to the heat-resistant porous layer.