Gel Electrolyte Split-Cell Supercapacitor With Mo-Doped Carbon Electrodes
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Solution Overview
Problem
Current supercapacitors face limitations in achieving high specific capacity, specific energy, rate capability, and cycle performance, particularly when using traditional electrodes, which hinder their widespread adoption in energy storage applications.
Innovation Solution
The development of nanocomposite electrodes comprising a substrate coated with a mixture of a binding compound, a conductive additive, and molybdenum-doped carbon materials, such as graphene and carbon nanotubes, which are synthesized through a method involving heating, sonicating, and doping with MoO42− molybdate ions to enhance electrochemical performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional electrodes are used in supercapacitors, then the device structure is simple and easy to manufacture, but the specific capacity, specific energy, rate capability, and cycle performance are limited
Solution Approach 1:
The patent uses composite materials by combining molybdenum oxide nanoparticles with carbon nanotubes or graphene to create nanocomposite electrodes. This composite structure integrates the high energy density of molybdenum oxide with the high conductivity and mechanical strength of carbon materials, achieving both improved cycle performance and maintained structural simplicity
Solution Approach 2:
The patent applies local quality by creating a core-shell structure where molybdenum oxide nanoparticles are embedded within or coated on carbon nanotubes/graphene. The carbon material provides a conductive network and mechanical framework while the molybdenum oxide provides localized high-capacity electrochemical reactions, optimizing both performance and structure
2Use of energy by moving object
If molybdenum oxide is used to increase energy density, then the specific energy improves, but the charge-discharge time and rate capability may be affected due to slower ion diffusion
Solution Approach 1:
The patent utilizes the porous structure of carbon nanotubes and graphene to create a three-dimensional network that facilitates rapid ion diffusion. The porous architecture provides multiple pathways for electrolyte penetration, allowing fast charge-discharge rates while maintaining high energy density through molybdenum oxide integration
Solution Approach 2:
The patent transitions from two-dimensional planar electrodes to three-dimensional nanocomposite structures using vertically aligned carbon nanotubes or stacked graphene layers. This dimensional change creates hierarchical porosity and increases the effective surface area, enabling both high specific energy and fast rate capability simultaneously
3Area of stationary object
If carbon nanomaterials like graphene and carbon nanotubes are used, then the surface area and electrical conductivity improve, but the manufacturing complexity and cost increase
Solution Approach 1:
The patent employs preliminary action by pre-synthesizing molybdenum oxide nanoparticles separately and then incorporating them into carbon nanotube or graphene structures during electrode fabrication. This pre-preparation of active material particles simplifies the overall manufacturing process compared to synthesizing complex nanocomposites from scratch
Solution Approach 2:
The patent uses carbon nanotubes or graphene as intermediary materials that bridge the gap between bulk electrodes and active molybdenum oxide particles. These carbon materials serve as conductive matrices and structural scaffolds, simplifying electrode fabrication while maintaining high surface area and conductivity
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 electrodes demonstrate improved specific capacitance, energy density, and cycle stability, maintaining at least 88-90% of initial capacitance after 10,000 charge-discharge cycles, with flexible and wearable device applications enabled by high ionic conductivity and enhanced electrolyte contact.
Implementation Method 1
molybdenum-doped carbon materials, such as graphene and carbon nanotubes, which are synthesized through a method involving heating, sonicating, and doping with MoO42− molybdate ions
Implementation Method 2
Gel electrolyte split cell supercapacitor
Data Source
AI summary
A nanocomposite electrode and a supercapacitor device including said nanocomposite electrode. The nanocomposite electrode includes a mixture of at least one binding compound, at least one conductive additive, and at least one molybdenum doped carbon material coated onto a substrate. The supercapacitor device includes two nanocomposite electrodes disposed facing one another, wherein the substrate of each nanocomposite electrode is coated with the mixture on an inside facing surface and the outer surfaces of the nanocomposite electrodes are not coated with the mixture, and the inside facing surfaces are separated by at least one electrolyte.