MXene Conductive Composition for Long-Term Oxidation Resistance
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Solution Overview
Problem
MXene materials are prone to oxidation in air, leading to a reduction in conductivity over time, and existing compositions using MXene, such as those in DMSO, suffer from significant conductivity loss within six months.
Innovation Solution
A conductive two-dimensional particle-containing composition is developed, comprising MXene particles with fluorine and oxygen elements on the surface, dispersed in a medium with higher relative permittivity than water, produced through a method involving etching, washing, intercalation, and delamination to maintain high conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If MXene is dispersed in conventional solvents like DMSO or water, then the material can be processed into conductive films, but the conductivity deteriorates significantly over time due to oxidation
Solution Approach 1:
The patent introduces a dispersion medium with specific properties (higher relative permittivity than water, specific viscosity range) as an intermediary between MXene particles and the environment. This specialized dispersion medium better stabilizes MXene particles, reducing oxidation and maintaining conductivity over time compared to conventional solvents like DMSO or water.
Solution Approach 2:
The patent changes key parameters of the dispersion medium, specifically selecting materials with higher relative permittivity than water and controlled viscosity ranges. These parameter changes optimize the stabilization of MXene particles, preventing oxidation and maintaining conductivity stability for extended periods.
2Reliability
If MXene surface functional groups are modified to improve conductivity, then electronic characteristics are enhanced, but oxidation resistance and long-term stability are compromised
Solution Approach 1:
The patent carefully controls the surface functional groups of MXene during synthesis, optimizing their composition and density. By adjusting these parameters, the patent achieves a balance between maintaining high conductivity through appropriate surface groups and minimizing oxidation susceptibility by avoiding excessive or reactive functional group formation.
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 composition maintains high conductivity over a long period, suitable for forming conductive films with enhanced stability and resistance to oxidation, suitable for applications like electrodes and electromagnetic shielding.
Implementation Method 1
a dispersion medium having a relative permittivity greater than that of water
Implementation Method 2
the conductive two-dimensional particle has a fluorine element and an oxygen element
Data Source
AI summary
A conductive two-dimensional particle-containing composition including: a conductive two-dimensional particle of a layered material including one or a plurality of layers; a dispersion medium having a relative permittivity greater than that of water; and a fluorine element and an oxygen element on a surface of the conductive two-dimensional particle, wherein the one or plurality of layers includes a layer body represented by: MmXn, wherein M is at least one metal of Group 3, 4, 5, 6, or 7, X is a carbon atom, a nitrogen atom, or a combination thereof, n is 1 to 4, and m is more than n and 5 or less, and a modifier or terminal T existing on a surface of the layer body, wherein T is at least one selected from the group consisting of a hydroxyl group, a fluorine atom, a chlorine atom, an oxygen atom, and a hydrogen atom.