Patterned Graphene Electrode Structure for Scalable Metal-Film Adhesion
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Solution Overview
Problem
Current methods for producing graphene-based electrodes face challenges in achieving large-area patterning, precise pattern formation, and cost-effective mass production due to difficulties in adhesion and impurity accumulation, particularly in the synthesis and transfer processes.
Innovation Solution
A novel electrode structure featuring a patterned graphene-graphitic carbon composite layer on a metal thin film, fabricated using laser printing with carbon powder toner and subsequent annealing, which enhances adhesion and allows for mass production through a simple roll-to-roll process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional methods (exfoliation, direct growth) are used to synthesize graphene-based materials, then graphene can be produced, but the synthesis process is complex and mass production is difficult
Solution Approach 1:
The patent changes the synthesis approach from complex physical/chemical processes to a simple thermal treatment process. By changing the parameter of synthesis method from exfoliation或直接生长 to thermal decomposition of carbon powder, the process becomes suitable for mass production while reducing complexity
Solution Approach 2:
The patent replaces mechanical exfoliation methods with a thermal field-based approach. Instead of using mechanical force to separate graphene layers, the invention uses thermal energy to decompose carbon powder and form graphene directly on the substrate, enabling scalable production
2Manufacturing precision
If DVD laser etching is used to pattern carbon-based electrodes, then patterning can be achieved, but large-area patterning is difficult and process cost increases excessively
Solution Approach 1:
The patent combines the synthesis and patterning steps into a single thermal treatment process. By using a mask during the thermal decomposition of carbon powder, both graphene synthesis and pattern formation are achieved simultaneously, eliminating the need for separate large-area patterning steps and reducing process cost
3Ease of manufacture
If inkjet printing is used to form carbon-based electrodes, then electrode fabrication can be achieved, but precise pattern formation is difficult due to impurity accumulation in the nozzle
Solution Approach 1:
The patent replaces the inkjet printing mechanical system with a thermal field-based synthesis method. Instead of jetting carbon-containing ink that accumulates impurities, the invention uses thermal decomposition of carbon powder with a mask, eliminating nozzle clogging and improving pattern precision while maintaining ease of manufacture
4Productivity
If graphene-based materials are synthesized and transferred, then electrode material can be obtained, but adhesion to metal thin film is poor and additional processes are required
Solution Approach 1:
The patent performs preliminary action by placing carbon powder directly on the metal thin film substrate before thermal treatment. This ensures that when graphene forms during thermal decomposition, it is already in direct contact with the metal substrate, guaranteeing strong adhesion without requiring subsequent transfer processes
Solution Approach 2:
The patent uses carbon powder as an intermediary material that facilitates both graphene synthesis and adhesion. The carbon powder serves as a precursor that decomposes to form graphene while simultaneously ensuring contact between the graphene and metal substrate, eliminating the need for separate adhesion promotion steps
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 solution achieves excellent adhesion and chemical stability, enabling the electrode structure to be used in electrochemical devices like supercapacitors and lithium-ion batteries without additional processing steps, with improved electrical conductivity and chemical resistance.
Implementation Method 1
forming a patterned printed layer on a metal thin film by laser printing using a laser printer toner containing carbon powder
Implementation Method 2
forming a patterned graphene-graphitic carbon composite layer on the metal thin film by annealing the metal thin film having the patterned printed layer formed thereon
Data Source
AI summary
The present disclosure provides an electrode structure including a metal thin film and a patterned graphene-graphitic carbon composite layer disposed on the metal thin film, a method for fabricating the electrode structure using laser printing, and an electrochemical device including the same.