Patterned Graphite Oxide Films for Supercapacitor Electrodes
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Solution Overview
Problem
Current technologies face challenges in creating conductive patterns on graphite oxide membranes for energy storage and water purification applications, particularly in achieving scalable and efficient methods for forming devices without external electrolytes.
Innovation Solution
A method involving the reduction of graphite oxide membranes using a CO2 laser to form patterned conducting reduced graphite oxide membranes, which can be integrated with current collector tapes to create supercapacitor devices with in-plane and sandwich geometries, enabling electrochemical performance without external electrolytes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional methods are used to create conductive patterns on graphite oxide membranes, then device functionality is achieved, but scalability and manufacturing efficiency are limited
Solution Approach 1:
The patent replaces traditional mechanical lithography and chemical reduction methods with laser-based processing. The laser directly writes conductive reduced graphite oxide patterns onto graphite oxide membranes through localized thermal reduction, eliminating the need for mechanical masking, chemical baths, and multiple processing steps. This substitution enables direct, scalable manufacturing of patterned membranes with high precision and efficiency.
2Reliability
If external electrolytes are used in supercapacitor devices, then electrochemical performance is achieved, but device complexity and electrolyte management requirements increase
Solution Approach 1:
The patent makes the graphite oxide membrane itself serve dual functions: as the electrode material and as the electrolyte medium. The membrane's inherent oxygen-containing functional groups provide ionic conductivity, eliminating the need for separate external electrolyte systems. This self-service approach simplifies device structure while maintaining electrochemical performance, as the membrane automatically provides both electron conduction (when reduced) and ion conduction (through its functional groups).
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 approach allows for the scalable production of high-capacity supercapacitor devices with excellent cyclic stability and energy storage capacity, demonstrating specific capacitance levels comparable to existing systems, and shows flexibility in geometry and electrolyte usage.
Implementation Method 1
A laser can be used to reduce the graphite-oxide membrane to conducting reduced graphite oxide. The laser can be a CO2 laser
Implementation Method 2
The patterned graphite oxide membrane can be a reduced graphite oxide-graphite oxide-reduced graphite oxide patterned graphite oxide membrane
Data Source
AI summary
The present invention relates to patterned graphite oxide films and methods to make and use same. The present invention includes a novel strategy developed to imprint any required conductive patterns onto self-assembled graphene oxide (GO) membranes.