Oxide-Complex Hydride Ionic Conductor for Press-Molded Li-Ion Transport
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing ion conductors, particularly those combining oxide-type and sulfide-type lithium ion conductors, face safety issues due to the presence of sulfide-type conductors, which generate hazardous gases, and struggle with low lithium ion conductivity despite enhanced particle contact through sintering or vapor deposition.
Innovation Solution
An ion conductor comprising an oxide-type lithium ion conductor and a complex hydride, where the complex hydride enhances particle contact through press molding without sintering or vapor deposition, achieving high lithium ion conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sulfide-type lithium ion conductor is used to enhance particle contact through press molding, then lithium ion conductivity is improved, but safety deteriorates due to hydrogen sulfide gas generation
Solution Approach 1:
The patent extracts and removes the sulfide-type lithium ion conductor component from the ion conductor composition, eliminating the source of hydrogen sulfide gas generation while retaining the oxide-type lithium ion conductor as the primary material
Solution Approach 2:
The patent introduces a complex hydride as an intermediary substance that modifies the oxide-type lithium ion conductor powder, enabling enhanced particle contact and lithium ion conductivity through press molding without requiring sulfide-type conductors
2Reliability
If oxide-type lithium ion conductor powder is subjected to sintering or vapor deposition to enhance lithium ion conductivity, then lithium ion conductivity is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent changes the physical and chemical parameters of the oxide-type lithium ion conductor powder by incorporating a complex hydride, which fundamentally alters the powder's pressibility and particle contact characteristics, enabling high conductivity through simple press molding
Solution Approach 2:
The patent replaces complex thermal processing systems (sintering furnaces, vapor deposition equipment) with a simple mechanical press molding system, achieving comparable or superior lithium ion conductivity through mechanical compression alone
3Object-affected harmful factors
If relative amount of sulfide-type lithium ion conductor is reduced to improve safety, then safety is improved, but lithium ion conductivity deteriorates
Solution Approach 1:
The complex hydride acts as a mediator that enables the oxide-type lithium ion conductor to achieve high particle contact and conductivity through press molding, compensating for the removal of sulfide-type conductors and maintaining conductivity without sacrificing safety
Solution Approach 2:
The patent creates a composite material system combining oxide-type lithium ion conductor with complex hydride, where the complex hydride provides the softness and pressibility needed for high particle contact, while the oxide-type conductor provides the conductive pathway, achieving both safety and 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 solution results in lithium ion conductivities of 1.0 × 10 -5< S/cm or higher at room temperature, with improved safety by avoiding hazardous gas generation and maintaining battery capacity.
Implementation Method 1
close contact between particles in the powder can be readily enhanced by pressing, because it is relatively soft in powder form
Implementation Method 2
The ion conductor contains an oxide-type lithium ion conductor and a complex hydride but contains no sulfide-type ion conductor, to thereby attain high lithium ion conductivity
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Provided is an ionic conductor with which adhesion between particles can be enhanced simply by pressure-molding a powder without using sulfide ionic conductors and without performing firing or vapor deposition, and which can exhibit a high lithium ionic conductivity. This ionic conductor contains, in addition to an oxide lithium ionic conductor, a complex hydride.