MXene Electrode Composition for Low-Impedance Biosignal Sensing
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Solution Overview
Problem
Existing electrodes with conductive gels face challenges in reducing impedance, necessitating improvements in MXene-based electrodes for high-resolution biological sensing applications.
Innovation Solution
A film containing metal cation-containing layered material particles, represented by MmXnTs, with a modifier T and a conductive gel portion, where the metal cation content is 0.004 mol or more per gram, is used to create an electrode with low impedance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conductive gel is provided on an electrode, then the electrode can be used for biological sensing applications, but the impedance of the electrode increases
Solution Approach 1:
The patent changes the chemical composition parameters of the conductive gel by incorporating metal cations (such as Li+, Na+, K+) into the MXene layered structure. This parameter change transforms the gel's electrical properties, reducing impedance while maintaining its biological sensing functionality. The metal cation content is controlled at 0.004 mol or more per gram of film to achieve optimal impedance reduction.
Solution Approach 2:
The patent creates a composite material system by combining MXene layered material particles with conductive gel containing metal cations. This composite structure leverages the high conductivity of MXene and the ionic conductivity of the metal cation-containing gel, achieving low impedance while maintaining electrode functionality for biological sensing applications.
2Object-affected harmful factors
If MXene particles are used to reduce impedance, then conductivity improves, but manufacturing complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-intercalating metal cations into the MXene layered structure during the material preparation phase. This preliminary treatment ensures that the MXene particles arrive at the electrode manufacturing stage with already-optimized conductivity properties, simplifying subsequent electrode fabrication processes and reducing overall manufacturing complexity.
Solution Approach 2:
The patent uses metal cations as intermediary substances that facilitate charge transfer between the MXene particles and the conductive gel. These metal cations act as mediators that enhance interfacial conductivity without requiring complex structural modifications to the MXene particles themselves, thereby simplifying the manufacturing process.
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 electrode exhibits low impedance and improved sensitivity for biosignal sensing due to the presence of metal cations, reducing ion deviation and enhancing conductivity.
Implementation Method 1
a content of the metal cation is 0.004 mol or more per gram of the film... the electrode exhibits low impedance and improved sensitivity for biosignal sensing due to the presence of metal cations, reducing ion deviation and enhancing conductivity
Data Source
AI summary
An electrode including: a film containing metal cation-containing layered material particles, the metal cation-containing layered material particles each have one layer or a plurality of layers and a metal cation, the one layer or each of the plurality of layers includes a layer body represented by: MmXn, wherein M is at least one metal of Group 3-7 and includes at least a Ti atom, X is a carbon atom, a nitrogen atom, or a combination thereof, n is 1 to 4, m is more than n but not more than 5, a modifier or terminal T existing on a surface of the layer body, and a content of the metal cation is 0.004 mol or more per gram of the film; and a conductive gel portion in contact with the film.