Solid Electrolyte Framework Without Dihedral Planes for Ion Diffusion
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Solution Overview
Problem
Current solid electrolyte materials for batteries lack high ionic conductivity, particularly at room temperature, due to dihedral planes in their anionic frameworks, which restrict ion diffusion and conductivity.
Innovation Solution
A novel solid electrolyte material with an anionic framework having a tetrahedral composite structure without dihedral planes, utilizing alkali or alkaline earth metal elements as ion-conducting species, enhancing lithium ionic conductivity by ensuring uniform ion potentials across tetrahedral sites.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If solid electrolyte materials with conventional anionic frameworks are used, then structural stability is maintained, but ionic conductivity is limited due to dihedral planes restricting ion diffusion
Solution Approach 1:
The patent applies asymmetry by designing an anionic framework without dihedral planes, creating a chiral or asymmetric tetrahedral composite structure. This asymmetric structure eliminates the symmetry-related restrictions on ion diffusion pathways, allowing for enhanced ionic conductivity while maintaining structural stability through the tetrahedral coordination geometry.
Solution Approach 2:
The patent changes the structural parameters of the anionic framework by transitioning from conventional structures with dihedral planes to a tetrahedral composite structure without dihedral planes. This parameter change in the framework geometry directly impacts ion diffusion characteristics, enabling higher ionic conductivity at room temperature.
2Reliability
If dihedral planes are present in the anionic framework, then structural symmetry is maintained, but ion diffusion is restricted and conductivity is reduced
Solution Approach 1:
The invention deliberately introduces asymmetry by eliminating dihedral planes from the anionic framework. The resulting tetrahedral composite structure lacks dihedral symmetry elements, creating asymmetric ion diffusion pathways that facilitate better ion transport while maintaining overall structural integrity through tetrahedral coordination.
3Reliability
If conventional solid electrolyte materials are used, then manufacturing simplicity is maintained, but room temperature ionic conductivity is insufficient
Solution Approach 1:
The patent achieves improved room temperature ionic conductivity by changing the fundamental geometric parameters of the anionic framework. The transition to a tetrahedral composite structure without dihedral planes creates favorable ion diffusion pathways that enable high conductivity at room temperature, while the synthesis approach follows conventional solid-state reaction methods.
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 material achieves high lithium ionic conductivity (≥7×10−5 S/cm at room temperature), leading to improved charge-discharge characteristics in all-solid-state batteries with enhanced ion diffusion and stability.
Implementation Method 1
enhancing lithium ionic conductivity by ensuring uniform ion potentials across tetrahedral sites
Implementation Method 2
The material achieves high lithium ionic conductivity (≥7×10−5 S/cm at room temperature), leading to improved charge-discharge characteristics
Data Source
AI summary
A solid electrolyte material of the present disclosure includes an ion-conducting species and an anionic framework. The ion-conducting species is at least one element selected from the group consisting of alkali metal elements and alkaline earth metal elements. The anionic framework has a tetrahedral composite structure with no dihedral planes. A battery of the present disclosure includes a positive electrode, a negative electrode, and an electrolyte layer disposed between the positive electrode and the negative electrode. At least one selected from the group consisting of the positive electrode, the negative electrode, and the electrolyte layer includes the solid electrolyte material of the present disclosure.