Mixed Conductor for Electrochemical Devices
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Solution Overview
Problem
Existing electrochemical devices, such as batteries, face performance deterioration due to the decomposition of organic liquid electrolytes and carbonaceous conductive materials by radicals involved in electrochemical reactions, necessitating a conductor that can simultaneously transfer ions and electrons while being stable to reaction by-products.
Innovation Solution
A mixed ionic and electronic conductor represented by the formula TxVayA1-x-yMzO3-δ is developed, where T, A, and M are specific cations, and Va is an oxygen vacancy, allowing for improved ionic and electronic conductivity and chemical stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If organic liquid electrolyte and carbonaceous conductive material are used in electrodes, then ion conduction and electron conduction are achieved, but the materials are easily decomposed by radicals causing performance deterioration
Solution Approach 1:
The patent develops a composite mixed conductor material with the general formula A1-x-yLaxMxO3-δ, combining multiple elements (A, La, M) in specific ratios to create a material that simultaneously provides both ion conduction and electron conduction pathways while maintaining chemical stability against radical decomposition in electrochemical environments
Solution Approach 2:
The patent optimizes the compositional parameters (x, y ratios of different cations, oxygen vacancy concentration δ) and structural parameters (crystal structure, particle size) of the mixed conductor to achieve the desired balance between conductivity and chemical stability, demonstrating that precise parameter control enables simultaneous improvement of both properties
2Reliability
If separate ion conductor and electron conductor are used in electrodes, then ion transfer and electron transfer occur through separate paths, but the electrode materials deteriorate due to radical decomposition
Solution Approach 1:
The patent merges the functions of separate ion conductor and electron conductor materials into a single mixed conductor phase with formula A1-x-yLaxMxO3-δ, where both ionic and electronic conduction occur within the same material structure, eliminating the need for complex multi-component electrode designs and providing inherent resistance to radical decomposition
Solution Approach 2:
The mixed conductor material serves multiple functions simultaneously: it acts as both an ion conductor and an electron conductor, provides structural stability against radical attack, and enables efficient charge transfer, thereby simplifying the overall electrode design while improving reliability
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 mixed conductor enhances the stability and performance of electrochemical devices by enabling simultaneous ion and electron transfer, reducing internal resistance and inhibiting device deterioration.
Implementation Method 1
a mixed ionic and electronic conductor that transfers ions and electrons simultaneously
Implementation Method 2
a mixed ionic and electronic conductor that transfers ions and electrons simultaneously
Implementation Method 3
TxVayA1-x-yMzO3-δ wherein Va is a vacancy, δ is an oxygen vacancy
Data Source
AI summary
A mixed ionic and electronic conductor represented by Formula 1:TxVayA1-x-yMzO3-δ,wherein T includes at least one monovalent cation, A includes at least one of a monovalent cation, a divalent cation, and a trivalent cation, M includes at least one of a trivalent cation, a tetravalent cation, and a pentavalent cation, M is an element other than Ti and Zr, Va is a vacancy, δ is an oxygen vacancy, 0<x, y≤0.25, 0<z<1, and 0≤δ≤1.