MXene Ti3C2 Transparent Conductors for Energy Storage
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Solution Overview
Problem
Current electrode materials for energy storage devices, such as batteries and supercapacitors, face challenges in achieving high volumetric capacitance, cyclability, and cost-effectiveness, while transparent conductors like ITO are limited by high material costs and complex fabrication processes.
Innovation Solution
Development of two-dimensional Mn+1Xn(Ts) MXene compositions, specifically Ti3C2, produced through etching titanium aluminum carbide with fluoridic acids, allowing for the creation of highly conductive, flexible, and transparent films without additives, with methods for intercalating alkali metals to tune electrical and optical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ITO is used as transparent conductor, then transparency and conductivity are achieved, but material cost and fabrication complexity increase
Solution Approach 1:
The patent changes the material parameter from ITO to MXene (Ti3C2), fundamentally altering the material composition to achieve similar transparency and conductivity functions while reducing fabrication complexity and material cost. The MXene material inherently provides both optical transparency and electrical conductivity without requiring complex deposition processes.
Solution Approach 2:
The patent employs MXene material which is cheaper than ITO, using a more cost-effective material substitution approach. The MXene can be processed from inexpensive precursors and requires simpler fabrication, effectively replacing the expensive and complex ITO system with a more economical alternative.
2Ease of manufacture
If conventional electrode materials are used, then manufacturing simplicity is maintained, but volumetric capacitance and cyclability are insufficient
Solution Approach 1:
The patent uses MXene as a composite material that combines the benefits of high volumetric capacitance and excellent cyclability while maintaining manufacturing simplicity. The MXene structure inherently provides both high capacitance and good cycle stability, eliminating the need for complex composite structures or additional functional layers.
Solution Approach 2:
The patent employs thin film morphology of MXene that provides high surface area to volume ratio, enabling high volumetric capacitance. The thin film structure also contributes to excellent cyclability by reducing mechanical stress during charge-discharge cycles, while maintaining ease of manufacture through simple deposition processes.
3Illumination intensity
If thin transparent conductive films are created, then transparency is improved, but electrical conductivity decreases
Solution Approach 1:
The patent changes the material composition from conventional transparent conductors to MXene, which has superior electrical conductivity that allows achieving both high transparency and high conductivity in thin films. The unique electronic structure of MXene provides high carrier density and mobility, maintaining conductivity even at reduced thickness.
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 MXene films demonstrate exceptional volumetric capacitance of up to 1000 F/cm3, excellent cyclability, and low material costs, with the ability to be processed into thin, transparent, and conductive forms suitable for various electronic devices, offering a breakthrough in energy storage and transparent conductive applications.
Implementation Method 1
etching the aluminum from Ti3AlC2 using fluoridic acids
Implementation Method 2
highly conductive solid or rolled into films
Implementation Method 3
methods for intercalating alkali metals to tune electrical and optical properties
Data Source
AI summary
The present invention(s) is directed to novel conductive Mn+1Xn(Ts) compositions exhibiting high volumetric capacitances, and methods of making the same. The present invention(s) is also directed to novel conductive Mn+1Xn(Ts) compositions, methods of preparing transparent conductors using these materials, and products derived from these methods.