Polyurea-Based Solid Electrolyte for Enhanced Ionic Conductivity
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Summary
Problems
Polyurea-based solid electrolytes face challenges in achieving simultaneous low crystallinity and high ionic conductivity due to the unfavorable effects of polypropyl oxide segments and high cross-linking density, which limits their ion conductivity and toughness.
Innovation solutions
A polyurea-based solid electrolyte composition incorporating a first polyaspartic ester with polyethylene glycol segments introduced through transesterification, a lithium salt, and an isocyanate curing agent with a controlled molecular weight and structure, optimizing the distribution of polyethylene glycol segments within the cross-linked network to enhance ionic conductivity and toughness.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If polyether amine is used to reduce crystallinity of polyethylene glycol, then crystallinity is reduced, but ionic conductivity deteriorates due to unfavorable polypropyl oxide segments
Why choose this principle:
The patent changes the chemical composition parameters by replacing polyether amine with polyaspartic ester, eliminating the unfavorable polypropyl oxide segments while maintaining reduced crystallinity through the polyethylene glycol side chains. This parameter substitution resolves the contradiction between low crystallinity and high ionic conductivity.
Principle concept:
If polyether amine is used to reduce crystallinity of polyethylene glycol, then crystallinity is reduced, but ionic conductivity deteriorates due to unfavorable polypropyl oxide segments
Why choose this principle:
The patent creates a composite structure by incorporating polyethylene glycol side chains into the polyaspartic ester backbone, forming a hybrid material that combines the low crystallinity benefit of polyethylene glycol with the high ionic conductivity of a polyaspartic ester matrix, avoiding the harmful polypropyl oxide segments.
Application Domain
Data Source
AI summary:
A polyurea-based solid electrolyte composition incorporating a first polyaspartic ester with polyethylene glycol segments introduced through transesterification, a lithium salt, and an isocyanate curing agent with a controlled molecular weight and structure, optimizing the distribution of polyethylene glycol segments within the cross-linked network to enhance ionic conductivity and toughness.
Abstract
A polyurea-based solid electrolyte, raw material components of which includes a first polyaspartic ester, a lithium salt, and an isocyanate curing agent; the ester group of the first polyaspartic ester includes a polyethylene glycol segment structure.