Hybrid Solid-State Electrolyte Interface for Lower Interfacial Resistance
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Solution Overview
Problem
The integration of a ceramic composite membrane with an ion-conducting polymer in hybrid solid-state electrolytes results in interfacial resistance, leading to high overpotential during electrochemical cycling, especially when the particle size is less than 32 μm, due to increased surface area and reactivity with metallic lithium.
Innovation Solution
A hybrid solid-state electrolyte is created by pre-wetting the ceramic composite membrane with an organic liquid solution before applying an ion-conducting polymer, which reduces interfacial resistance and overpotential through a loosely bound organic liquid interface, improving lithium ion conduction and battery performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the particle size of ceramic composite membrane is reduced to increase surface area, then the reactivity with metallic lithium increases, but the interfacial resistance increases and overpotential becomes high
Solution Approach 1:
An organic liquid solution layer is introduced as an intermediary between the ceramic composite membrane and the ion-conducting polymer. This organic liquid layer mediates the interface by reducing interfacial resistance through loose binding interactions, enabling efficient lithium ion transport while maintaining the high surface area benefits of fine particle-sized ceramic membrane
Solution Approach 2:
The physical and chemical parameters of the interface are changed by introducing the organic liquid solution with specific properties (loose binding characteristics). This parameter change transforms the rigid ceramic-polymer interface into a more flexible organic-mediated interface that facilitates ion transport and reduces resistance
2Stability of the object's composition
If a rigid interface is formed between ceramic membrane and polymer layers, then structural stability is improved, but ion conduction is hindered due to high interfacial resistance
Solution Approach 1:
The organic liquid solution serves as a mediator that replaces the rigid ceramic-polymer direct interface with a flexible organic layer. This intermediary maintains structural stability while enabling superior ion conduction through its loose binding nature, effectively decoupling structural integrity from interfacial resistance
Solution Approach 2:
The organic liquid solution forms a flexible thin film interface between the rigid ceramic membrane and polymer layers. This flexible interface accommodates volume changes and maintains contact while providing low resistance pathways for lithium ion transport, contrasting with rigid interfaces that hinder ion conduction
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 significantly reduces interfacial resistance, lowers overpotential, enhances stable lithium plating and stripping, and improves the overall performance of energy storage devices by creating a smoother interface between the ceramic membrane and polymer layers.
Implementation Method 1
reduces interfacial resistance and overpotential through a loosely bound organic liquid interface, improving lithium ion conduction and battery performance
Data Source
AI summary
A hybrid solid-state electrolyte is disclosed. The hybrid solid-state electrolyte includes an inorganic ion-conducting membrane. The hybrid solid-state electrolyte further includes a first layer of an organic liquid solution surrounding a surface of the inorganic ion-conducting membrane. The hybrid solid-state electrolyte further includes a second layer of an ion-conducting polymer surrounding the first layer of the organic liquid solution.