MXene Internal Electrodes for Thin Multilayer Capacitors
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Solution Overview
Problem
The challenge of miniaturizing multilayered capacitors while maintaining high capacitance and reliability is hindered by the thinning of internal electrodes, which leads to decreased electrode connectivity and performance.
Innovation Solution
The use of a compound represented by Chemical Formula 1, comprising Mxene layers, as internal electrodes, which are thin and have excellent electrical conductivity, reduces equivalent series inductance and allows for ultra-thin electrodes with improved impedance characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the internal electrode is thinned to achieve miniaturization and high capacitance, then the capacitance and miniaturization are improved, but the electrode connectivity and reliability deteriorate
Solution Approach 1:
The patent changes the material composition parameters of the internal electrode by incorporating MXene (Mn+1Xn, where M is a transition metal and X is C or N) into the electrode structure. This material parameter change enables the electrode to maintain high conductivity and connectivity even at reduced thickness, thus improving reliability while achieving miniaturization
Solution Approach 2:
The patent uses composite material structure by combining MXene with traditional electrode materials. The MXene layers are stacked to form a laminate structure that provides both mechanical integrity and electrical conductivity, resolving the contradiction between thinness and connectivity
2Quantity of substance
If the internal electrode is thinned to improve capacitance, then the capacitance is improved, but the withstand voltage characteristics deteriorate
Solution Approach 1:
The patent modifies the electrode material parameters by using MXene with its unique two-dimensional structure and high electron mobility. This parameter change allows the thin electrode to maintain high capacitance while the material's inherent properties provide sufficient electrical strength for withstanding voltage
Solution Approach 2:
The MXene layers act as an intermediary structure between the dielectric layers, providing a conductive pathway that maintains electrical integrity. The stacked MXene laminate serves as a mediator that distributes electrical stress, preventing breakdown even at reduced thickness
Data Source
AI summary
The multilayered capacitor according to the present disclosure includes a capacitor body including a dielectric layer and an internal electrode, and an external electrode disposed on an outside surface of the capacitor body,wherein the internal electrode includes a compound represented by Chemical Formula 1: Mn+1Xn wherein, in Chemical Formula 1,M includes at least one selected from the group consisting of Ti, Zr, Hf, Sc, Cr, V, Nb, Ta, Mo, Mn, W, Y, and combinations thereof,X includes C, N, or a combination thereof, and1≤n≤2.