Graphene Monoxide Composite Electrodes With Controlled Oxygen Retention
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Solution Overview
Problem
Current methods for producing graphene monoxide (GmO) are not scalable and limited to nanogram quantities, and existing graphene oxide processing methods face challenges in achieving high oxygen content and safe handling due to exothermic reactions.
Innovation Solution
A process is developed to produce graphene monoxide-based composites, specifically GmGT materials, with controlled thermal treatment and transition metal oxides, allowing for gram-scale production and safe handling by minimizing exothermic reactions, and incorporating distinct oxygen functional groups.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional methods are used to process graphene oxide, then oxygen functional groups are removed to produce reduced graphene oxide, but the oxygen content is reduced and the original functional properties are lost
Solution Approach 1:
The patent applies parameter changes by controlling the thermal treatment temperature and atmosphere to preserve oxygen functional groups. By treating graphene oxide at specific temperatures (150-350°C) in controlled atmospheres, the process maintains high oxygen content (30-80 atomic %) while achieving safe handling characteristics, thus resolving the contradiction between maintaining oxygen content and ease of manufacture
Solution Approach 2:
The patent creates composite materials by combining graphene oxide with metal oxides (such as MnO2, Fe2O3, Co3O4) to form GmGT composites. This composite approach allows the material to retain oxygen functional groups while gaining enhanced electrochemical performance and safer thermal characteristics, simultaneously achieving high oxygen content and improved manufacturability
2Object-generated harmful factors
If graphene oxide is heated to remove oxygen functional groups, then reduced graphene oxide is produced, but exothermic reactions occur creating safety hazards
Solution Approach 1:
The patent converts the harmful exothermic reaction characteristic of graphene oxide into a beneficial feature by carefully controlling thermal treatment to produce GmO and GmGT materials with stable oxygen content. The controlled thermal processing transforms the potentially dangerous exothermic behavior into a controlled process that maintains oxygen functional groups while ensuring safe handling, thus converting harm into benefit
Solution Approach 2:
The patent employs inert atmosphere processing during thermal treatment to prevent uncontrolled exothermic reactions. By conducting thermal treatment in controlled inert or reducing atmospheres, the process safely maintains high oxygen content without triggering dangerous exothermic events, resolving the contradiction between safety and oxygen content preservation
3Productivity
If graphene oxide is produced at scale, then commercial applications become feasible, but the exothermic nature makes dry powder handling challenging
Solution Approach 1:
The patent applies parameter changes by modifying the thermal history and oxygen content of graphene oxide to produce GmO and GmGT materials with fundamentally different thermal characteristics. These parameter changes result in materials that can be produced at scale with safe handling properties, enabling both high productivity and safe handling of dry powder forms
Solution Approach 2:
The patent develops composite materials (GmGT) combining graphene oxide derivatives with metal oxides to achieve scalable production with safe handling characteristics. The composite structure provides both the desired electrochemical performance and improved safety profile, allowing commercial-scale production without the handling challenges of pure graphene oxide
4Reliability
If oxygen functional groups are retained in high amounts, then electrochemical performance is enhanced, but thermal stability is reduced
Solution Approach 1:
The patent resolves this contradiction by creating composite materials where graphene oxide derivatives with high oxygen content are combined with thermally stable metal oxides. The metal oxide component provides thermal stability while the graphene oxide component maintains high oxygen content for electrochemical performance, achieving both reliability and temperature stability simultaneously
Solution Approach 2:
The patent applies parameter changes by precisely controlling the oxygen content, particle size, and thermal treatment parameters to optimize both electrochemical performance and thermal stability. By adjusting these parameters within specific ranges, the material achieves enhanced electrochemical performance while maintaining adequate thermal stability for practical applications
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 process enables the creation of GmGT materials with enhanced performance in electrochemical applications, such as faster charging, higher gravimetric capacity, and low-temperature operation, while ensuring safety and scalability.
Implementation Method 1
A process is developed to produce graphene monoxide-based composites, specifically GmGT materials, with controlled thermal treatment
Implementation Method 2
the first electrode is anode comprising a graphene monoxide (GmO)-based composite material... the electrochemical cell has a faster charge rate at 1 C or greater than a corresponding electrochemical cell with a graphite-only anode
Data Source
AI summary
A composition of graphene-based nanomaterials characterized by at least one area of one atomic layer of graphene monoxide, wherein at least a portion of oxygen molecules present in the graphene monoxide are incorporated into specific crystalline structural moieties, methods of making the same, electrodes in electrochemical devices incorporating the same, and compositions of lithium and graphene monoxide containing materials that result from cycling said electrodes.