Solid Electrolyte Binder for Battery Ionic Conduction
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Solution Overview
Problem
Batteries using solid electrolytes face challenges with insufficient ionic conduction due to inadequate junction areas between particles, leading to increased interface resistance and decreased battery performance.
Innovation Solution
Incorporating a solid electrolyte binder in the cathode, anode, and solid electrolyte layer, which exhibits fluidity upon heating to bind particles and create conduction paths for lithium ions, thereby enhancing ionic conduction and reducing interface resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a solid electrolyte is used instead of an electrolytic solution, then liquid leakage is prevented and energy density is increased, but interface resistance between particles is increased due to insufficient junction areas
Solution Approach 1:
The patent introduces a binder material as an intermediary substance between solid electrolyte particles. This binder fills the gaps and junction areas between particles, providing a medium that facilitates ionic conduction and reduces interface resistance while maintaining the solid-state structure that prevents liquid leakage.
Solution Approach 2:
The patent utilizes the porous structure formed by solid electrolyte particles and strategically fills these pores with binder material. This approach maintains the necessary surface area and junction areas for ionic conduction while preventing liquid leakage, effectively managing the interface resistance issue through controlled porosity management.
2Stability of the object's composition
If solid electrolyte particles are densely packed, then structural stability is improved, but junction areas between particles are reduced, leading to increased interface resistance
Solution Approach 1:
The patent applies local quality by differentiating the properties of different regions within the solid electrolyte structure. The binder material is specifically placed at junction areas and interfaces between particles, providing enhanced ionic conduction pathways where needed most, while allowing dense packing in bulk regions for structural stability.
Solution Approach 2:
The patent creates a composite material system combining solid electrolyte particles with binder material. This composite structure leverages the structural stability of densely packed solid electrolyte particles while using the binder phase to reduce interface resistance at particle junctions, achieving both stability and low resistance through material composition.
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 use of a solid electrolyte binder improves ionic conduction and suppresses the increase in interface resistance, resulting in a battery with enhanced performance and capacity.
Implementation Method 1
one or more of the cathode, the anode, and the solid electrolyte layer include a solid electrolyte binder... heating the solid electrolyte binder
Implementation Method 2
a solid electrolyte binder... which exhibits fluidity upon heating
Implementation Method 3
sufficient ionic conduction is not obtained between the particles, and therefore, interface resistance becomes problematic... improves ionic conduction
Data Source
AI summary
A battery capable of improving ionic conduction is provided. The battery includes a cathode, an anode, and a solid electrolyte layer. One or more of the cathode, the anode, and the solid electrolyte layer includes a solid electrolyte binder.