Hybrid Solid-State Electrolyte Interface for Lower Impedance
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Solution Overview
Problem
Existing hybrid solid-state electrolytes face large interfacial impedances due to material incompatibilities between organic or polymer materials and inorganic or ceramic materials, leading to reduced cell performance in lithium-ion batteries.
Innovation Solution
A hybrid solid-state electrolyte layer comprising a polymeric material, a solid-state electrolyte ceramic material, and an interfacial material with a branched copolymer including dopamine and a second monomer is developed, which adheres the polymeric and ceramic materials, improving interface compatibility and reducing interfacial resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hybrid solid-state electrolytes are used to combine polymeric and ceramic materials, then ionic conductivity is improved, but interfacial impedance increases due to material incompatibilities
Solution Approach 1:
The patent introduces an interfacial material layer composed of dopamine-functionalized polymeric material that acts as a mediator between the polymeric electrolyte and ceramic electrolyte. This interfacial layer improves interfacial compatibility and reduces interfacial impedance while maintaining high ionic conductivity, thereby resolving the contradiction between improved ionic conductivity and increased interfacial impedance
Solution Approach 2:
The patent creates a composite structure consisting of polymeric electrolyte, interfacial material, and ceramic electrolyte. The dopamine-functionalized interfacial layer forms a composite material system that combines the advantages of both polymeric and ceramic materials while mitigating their incompatibilities, achieving both high ionic conductivity and low interfacial impedance
2Reliability
If inorganic ceramic solid-state electrolytes are used, then ionic conductivity is improved, but processing difficulty increases due to brittleness
Solution Approach 1:
The patent creates a composite electrolyte system where ceramic particles are dispersed in a polymeric matrix with dopamine-functionalized interfacial layers. This composite structure provides the high ionic conductivity of ceramics while the polymeric matrix offers flexibility and ease of processing, resolving the contradiction between improved ionic conductivity and increased processing difficulty
Solution Approach 2:
The patent changes the physical state and mechanical properties of the electrolyte system by combining rigid ceramic particles with flexible polymeric material. The dopamine-functionalized interfacial layer modifies the interface properties, enabling the composite to achieve both high ionic conductivity and improved processability compared to pure ceramic electrolytes
3Ease of manufacture
If solid-state polymer electrolytes are used, then processing ease is improved, but ionic conductivity decreases due to low room-temperature conductivity
Solution Approach 1:
The patent creates a composite electrolyte where ceramic particles providing high ionic conductivity are dispersed in a polymeric matrix that ensures ease of processing. The dopamine-functionalized interfacial layer enhances the compatibility between phases, enabling the composite to achieve both easy processing and high ionic conductivity, resolving the contradiction between processing ease and ionic conductivity
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 hybrid electrolyte layer enhances ionic conductivity and reduces interfacial impedance, resulting in improved cell performance and stability.
Implementation Method 1
an interfacial material adhering the polymeric material and the solid-state electrolyte ceramic material, where the interfacial material includes a branched copolymer that includes dopamine and a second monomer
Implementation Method 2
The electrolyte is suitable for conducting lithium ions between the electrodes... The hybrid solid-state electrolyte layer may have an average thickness greater than or equal to about 5 micrometers to less than or equal to about 200 micrometers
Data Source
AI summary
A hybrid solid-state electrolyte layer for use in an electrochemical cell is provided. The hybrid solid-state electrolyte layer includes a polymeric material, a ceramic material, and an interfacial material adhering the polymeric material and the ceramic material. The interfacial material includes a branched copolymer that includes dopamine and a second monomer. The second monomer forms a polymeric moiety in the copolymer that is the same or similar to the polymeric material. In certain variations, the polymeric material defines a polymeric layer, the ceramic material defines a ceramic layer, and the interfacial material defines an interfacial layer that is disposed between the polymeric layer and the ceramic layer. In other variations, the polymeric material defines a polymeric matrix, the ceramic material defines a plurality of ceramic particles dispersed in the polymeric matrix, and the plurality of ceramic particles are coated with the interfacial material.