Perovskite Solid Electrolyte for Fluoride Ion Conductivity

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Solution Overview

Problem

Current fluoride ion batteries require a solid electrolyte with improved fluoride ion conductivity to enhance their performance.

Innovation Solution

A solid electrolyte with a perovskite or layered perovskite structure, containing specific cations such as R1R2R3R4N+ as the A cation and divalent and monovalent metal cations like Mg2+ and Li+, respectively, is developed to achieve excellent fluoride ion conductivity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional solid electrolyte materials are used, then the battery structure can be maintained, but fluoride ion conductivity is insufficient

Engineering Contradiction:

Improvefluoride ion conductivityVSAvoidcrystal phase composition

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent changes the chemical composition parameters of the solid electrolyte by incorporating specific cations (R1R2R3R4N+ or small hydrocarbon cations at A-site, and divalent/monovalent metal cations at B-site) to optimize fluoride ion conductivity while maintaining the perovskite crystal structure

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates a composite solid electrolyte material combining multiple cation types (organic/inorganic hybrid at A-site, mixed valence metals at B-site) within a perovskite framework to achieve synergistic improvement in fluoride ion conductivity

Inventive Principle:

Principle #40Composite materials

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 solid electrolyte exhibits significantly improved fluoride ion conductivity, enabling better performance in fluoride ion batteries with enhanced capacity properties.

Implementation Method 1

a solid electrolyte having excellent fluoride ion conductivity

Methodology Applied

Scientific EffectIon conduction: Conduction (electrical)

Data Source

PatentUS10651501B1Solid electrolyte and fluoride ion battery

Publication Date: 2020.05.12 TOYOTA JIDOSHA KK

AI summary

A main object of the present disclosure is to provide a solid electrolyte including excellent fluoride ion conductivity. The present disclosure achieves the object by providing a solid electrolyte including fluoride ion conductivity, the solid electrolyte comprising: a crystal phase having a perovskite structure or a layered perovskite structure; the crystal phase contains A cation positioned in A site, B cation positioned in B site, and a fluoride ion; the A cation contains R1R2R3R4N+ cation (each of R1 to R4 is independently a hydrogen element or a hydrocarbon group with two or less carbon atoms) or a hydrocarbon cation with two or less carbon atoms; and the B cation contains a divalent metal cation and a monovalent metal cation.