Conductive Electrode Nanograins Network Structure
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Solution Overview
Problem
Current methods for producing ruthenium oxide with a network structure of ultrafine nanograins and/or nanoparticles are not suitable for large-scale production due to limitations in productivity and cost competitiveness, and existing techniques struggle to achieve a high specific surface area while maintaining superior electrical conductivity.
Innovation Solution
A process involving spinning a mixture solution of a conducting metal precursor and a polymer onto a current collector, followed by heat compressing or hot pressing to form a porous conducting metal oxide film with a network structure, and then coating a conducting metal oxide layer to enhance specific surface area and electrical conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a template such as AAO is used to prepare ruthenium oxide with nanowire structure, then the specific surface area and chemical reactivity are improved, but the productivity and cost competitiveness deteriorate
Solution Approach 1:
The invention extracts and removes the polymer component from the composite fiber layer through heat treatment, leaving behind the ruthenium oxide network structure. This eliminates the need for templates like AAO while maintaining the nanowire/nanofiber morphology and high surface area characteristics, thereby improving productivity and cost-effectiveness.
Solution Approach 2:
The invention changes the preparation parameters by using electrospinning to create composite fibers with controlled morphology, followed by heat treatment at specific temperatures to remove the polymer and form the ruthenium oxide network. This parameter change enables template-free synthesis with high productivity while maintaining large surface area.
2Manufacturing precision
If the size of ruthenium oxide nanowire is restricted by the template size, then the manufacturing precision is improved, but the adaptability and large-scale production capability deteriorate
Solution Approach 1:
The invention segments the ruthenium oxide structure into a network of nanofibers and nanograins that are interconnected, rather than relying on a single template-defined geometry. This segmentation allows the material to maintain precise nanoscale features while being adaptable to large-scale production through continuous fiber formation and network assembly.
Solution Approach 2:
The electrospun composite fiber layer serves multiple functions: it provides the structural framework for ruthenium oxide formation, controls the nanoscale morphology, and acts as a removable sacrificial component during heat treatment. This universal approach eliminates the need for template-specific procedures, enhancing adaptability for large-scale production.
3Quantity of substance
If an electrochemical capacitor is designed for high-density energy storage, then the capacity is improved, but the charge/discharge speed deteriorates
Solution Approach 1:
The ruthenium oxide network formed from electrospun composite fibers creates a highly porous structure with interconnected nanofibers and nanograins. This porous morphology provides large surface area for charge storage while maintaining excellent electrolyte penetration and ion transport pathways, enabling both high capacity and fast charge/discharge rates.
Solution Approach 2:
The invention transitions from traditional two-dimensional electrode surfaces to a three-dimensional network structure of nanofibers and nanograins. This dimensional change increases the available surface area for charge storage while maintaining short ion diffusion paths, thereby achieving high energy density without sacrificing power density.
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 resulting porous conducting metal oxide electrode exhibits significantly improved specific surface area and electrical conductivity, making it suitable for high-capacity and high-speed supercapacitors, catalysts, and sensors, with improved adhesion to the current collector and ease of forming thick conducting metal oxide films.
Implementation Method 1
spinning a mixture solution of a conducting metal precursor and a polymer onto a current collector
Implementation Method 2
heat treating the heat compressed or hot pressed composite fiber to prepare a porous conducting metal oxide film having a network structure with the polymer removed from the composite fiber
Implementation Method 3
coating a conducting metal oxide layer on the network layer of the porous conducting metal oxide through the constant current method or the cyclic voltammetric method
Data Source
AI summary
A porous conducting metal oxide electrode prepared by depositing a porous conducting metal oxide film containing a conducting metal oxide film layer having a network structure of nanofibers, containing nanograins or nanoparticles, on at least one surface of a current collector, and a conducting metal oxide coating layer on the network layer of the porous conducting metal oxide through a constant current method or a cyclic voltammetric method; and a high-speed charge/discharge and ultrahigh-capacity supercapacitor using the porous conducting metal oxide electrode are provided.