Nanocomposite Supercapacitor Electrode With N-Doped Mo2C Nanosheets
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Solution Overview
Problem
Current electrode materials for supercapacitors face challenges in achieving high surface area, chemical stability, ion/electron conductivity, catalytic activity, energy/power densities, and durability while being cost-effective and non-toxic, with conventional porous carbon materials having limitations in mass production, cost, and cycling life.
Innovation Solution
A nanocomposite electrode is developed using nitrogen-doped molybdenum carbide nanosheets coated with a mixture of conductive additives and electrolytes on a substrate, with a crystalline structure and specific pore size, allowing for enhanced ion interaction and energy storage, and a method for synthesizing these nanosheets involving calcination and nitrogen doping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If conventional porous carbon materials are used for supercapacitor electrodes, then high surface area and excellent electrical conductivity are achieved, but mass production difficulty, high cost, and lower cycling life occur
Solution Approach 1:
The patent uses composite materials by combining transition metal carbides/nitrides with porous carbon materials to create a hybrid electrode structure. This composite approach allows the carbon component to provide high surface area and conductivity while the metal carbide/nitride component enhances catalytic activity and structural stability, enabling better mass production characteristics and cycling life without sacrificing the beneficial properties of porous carbon
2Area of stationary object
If conventional porous carbon materials are used for supercapacitor electrodes, then high surface area and excellent electrical conductivity are achieved, but high cost occurs
Solution Approach 1:
The composite structure allows optimization of material composition and ratios. By combining relatively abundant porous carbon with transition metal carbides/nitrides in controlled proportions, the electrode achieves high performance at reduced cost compared to using expensive pure porous carbon or rare metal materials alone
Solution Approach 2:
The patent optimizes parameters such as the ratio of carbon to metal carbide/nitride, pore size distribution, and surface area to volume ratio to achieve cost-effective high-performance electrodes. These parameter adjustments allow tuning of performance-cost balance without requiring expensive materials
3Area of stationary object
If conventional porous carbon materials are used for supercapacitor electrodes, then high surface area is achieved, but lower cycling life occurs
Solution Approach 1:
The composite of porous carbon with transition metal carbides/nitrides creates a more stable electrode structure. The metal carbide/nitride component provides enhanced mechanical strength and chemical stability that prevents degradation during cycling, while the porous carbon maintains high surface area for electrochemical activity, resulting in extended cycling life
4Reliability
If transition metal nitrides and carbides are integrated into supercapacitor electrodes, then high catalytic activity and chemical stability are achieved, but further development is required to achieve high performance
Solution Approach 1:
The patent creates composite electrodes combining transition metal carbides/nitrides with porous carbon materials to synergistically achieve both high chemical stability and high energy density. The metal carbide/nitride provides catalytic activity and stability while the porous carbon contributes high surface area and electrical conductivity, together delivering superior energy density without sacrificing stability
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 nanocomposite electrode demonstrates high specific capacitance, power density, and energy density, with maintained performance over 30 days, suitable for flexible and wearable electronic devices, and improved ion conductivity and cyclability.
Implementation Method 1
high surface area, excellent chemical stability, high ion/electron conductivity
Implementation Method 2
specific pore size, allowing for enhanced ion interaction
Implementation Method 3
the electrolyte penetrates the pores of the nitrogen-doped molybdenum carbide nanosheets
Implementation Method 4
high ion/electron conductivity
Implementation Method 5
high ion/electron conductivity
Implementation Method 6
at least one binding compound
Data Source
AI summary
A nanocomposite electrode and a method of making the nanocomposite. The nanocomposite electrode includes an electrode substrate, nitrogen-doped molybdenum carbide nanosheets, at least one electrolyte, at least one binding compound, and at least one conductive additive. The electrode substrate is coated with a mixture of the nitrogen-doped molybdenum carbide nanosheets, at least one binding compound, at least one conductive additive, and at least one electrolyte, where the electrolyte penetrates the pores of the nitrogen-doped molybdenum carbide nanosheets, and where the nitrogen-doped molybdenum carbide nanosheets are an outer layer of the electrode.