Solid Electrolyte Laminate for Dendrite-Resistant Voltage Stability
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Solution Overview
Problem
Existing all-solid-state secondary batteries face challenges in preventing short circuits caused by dendrite formation and achieving stable voltage output, especially in high-temperature environments.
Innovation Solution
A laminated body is introduced, comprising a solid electrolyte layer and a layer containing a heat-resistant resin and an ion-conductive material, which are adjacent to each other. This configuration prevents short circuits by physically inhibiting dendrite growth and ensures stable voltage output through enhanced ion conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a solid electrolyte layer is used in an all-solid-state secondary battery, then the battery structure is simplified and energy density is improved, but dendrite formation occurs causing short circuits between electrodes
Solution Approach 1:
The invention uses a composite layer containing both a heat-resistant resin and an ion-conductive material. The heat-resistant resin provides mechanical strength and dendrite suppression, while the ion-conductive material ensures efficient ion transport. This composite structure resolves the contradiction by combining materials with complementary properties to achieve both structural integrity and electrochemical performance.
Solution Approach 2:
The layer containing the heat-resistant resin and ion-conductive material acts as an intermediary between the solid electrolyte layer and the electrode. It mediates the interaction by providing a physical barrier that suppresses dendrite penetration while maintaining ion conductivity, thus preventing short circuits without compromising the solid electrolyte's function.
2Ease of manufacture
If conventional resins are used in the battery structure, then processing is easier, but voltage output becomes unstable in high-temperature environments
Solution Approach 1:
The invention specifies that the heat-resistant resin should have a glass-transition temperature of not less than 200°C. By changing the thermal parameter (glass-transition temperature) of the resin, the layer maintains its mechanical properties and dimensional stability at high temperatures, ensuring stable voltage output while remaining manufacturable.
3Temperature
If the glass-transition temperature of the resin is increased to prevent deformation at high temperatures, then thermal stability is improved, but ion conductivity may be reduced
Solution Approach 1:
The composite layer combines a heat-resistant resin with an ion-conductive material. The heat-resistant resin provides thermal stability with high glass-transition temperature, while the ion-conductive material compensates for any reduction in ion conductivity, ensuring both thermal stability and adequate ion transport are achieved simultaneously.
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 proposed solution effectively prevents short circuits caused by dendrite formation and achieves stable voltage output, even in high-temperature environments, thereby improving the reliability and performance of all-solid-state secondary batteries.
Implementation Method 1
a layer containing a heat-resistant resin and an ion-conductive material, the solid electrolyte layer and the layer containing the heat-resistant resin and the ion-conductive material being adjacent to each other
Implementation Method 2
the heat-resistant resin has a glass-transition temperature of not less than 200°C
Data Source
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AI summary
Provided is a laminated body in which a short circuit caused by the formation of a dendrite is prevented and which achieves stable voltage output. A laminated body (50) in accordance with an aspect of the present invention includes a solid electrolyte layer (20) and a layer (30) that contains a heat-resistant resin and an ion-conductive material. The solid electrolyte layer (20) and the layer (30) containing the heat-resistant resin and the ion-conductive material are adjacent to each other.