Ricardo Oliveira | 2DM: Why did a landmark study find "fake graphene" from 70 global suppliers?
02:45 - 04:31
Other snippets from this talk
Summary of the clip:
How can advanced graphene morphology redefine the efficiency and durability limits of hydrogen fuel cells and electrolyzers?
Optimizing the physical dimensions of two-dimensional materials is critical for high-performance printed electronics and electrochemical devices. Utilizing water-based graphene formulations characterized by ultra-thin flakes of one to three atomic layers—corresponding to a thickness of 0.5 to 1.4 nanometers—and a lateral dimension of approximately four microns ensures exceptional printability. These precise structural parameters yield high electrical conductivity and outstanding volumetric electrochemical capacitance, making them ideal precursors for advanced energy conversion architectures.
In the development of membrane electrode assemblies (MEAs) for hydrogen generation and power production, transitioning to graphene aerogels offers a transformative pathway. Scanning electron microscopy reveals a highly porous, stable surface morphology that serves as an ideal scaffold for catalyst integration. By employing a bottom-up, single-atom deposition technique, active catalytic materials like platinum can be dispersed with extreme precision across the aerogel matrix.
This atomic-scale engineering drastically reduces the required platinum loading while simultaneously boosting mass activity. Furthermore, by precisely tuning the functional groups on the graphene surface, researchers can mitigate catalyst degradation and enhance interfacial bonding. This chemical optimization yields exceptional durability, restricting performance degradation to a mere 7% to 10% drop even after 4,000 operational cycles.
In this short video, you can learn:
* How specific lateral flake sizes and nanometer-scale thicknesses optimize the printability and electrochemical capacitance of water-based graphene.
* The role of graphene aerogels in restructuring membrane electrode assemblies (MEAs) for fuel cells and hydrogen electrolyzers.
* How single-atom deposition and functional group tuning minimize platinum loading while dramatically improving catalyst durability.
📋 **Clip Abstract**
The speaker discusses the physical properties of their water-based graphene flakes and their application in membrane electrode assemblies for hydrogen fuel cells and electrolyzers. He explains how utilizing graphene aerogels and single-atom platinum deposition enhances mass activity and durability while reducing catalyst loading.
🎤 Speaker: Ricardo Oliveira
🏢 Company: 2DM
📅 Event: Graphene & 2D Materials 2021: End Users, Applications, Major Producers & Start Up 2021
📍 Location: TechBlick Platform Online
🌐 Learn more at the next TechBlick event: https://www.techblick.com
#GrapheneStandards, #FewLayerGraphene, #TwoDimensionalMaterials, #MaterialCharacterization, #PrintedElectronics, #AdvancedMaterials
This is a highlight of the presentation:
More Highlights from the same talk.
12:25 - 14:58
Why does true graphene outperform carbon nanotubes in polycarbonate composites?
How can 2D material networks bridge the gap between nanoscale properties and macroscale composite performance?
Aerogel architectures derived from 2D materials offer an exceptional structural foundation for active components. By leveraging high porosity, accessible pore networks, and abundant active sites, these foam-like structures serve as ideal scaffolds. Depositing metals, metal oxides, or polymers onto these networks via bottom-up single-atom deposition enables highly efficient active material loading. In fuel cell applications, this approach yields membrane electrode assemblies with significantly enhanced mass activity and reduced platinum loading, while tunable surface chemistry improves long-term durability.
Beyond carbon-based scaffolds, transition metal carbides, nitrides, and carbonitrides—collectively known as MXenes—represent a vast class of 2D materials with distinct electromechanical advantages. Exfoliated from MAX phases into ultra-thin flakes, these materials can be dispersed in water without additives to create highly conductive, printable inks. When integrated into soft substrates like cotton fibers via simple dip-coating, the conforming 2D flakes establish sensitive conductive networks capable of resolving low-percentage strains and subtle pressure variations.
The rheological and electrical properties of pure MXene inks open diverse pathways for additive manufacturing and printed electronics. These water-based formulations are compatible with extrusion-based 3D printing and screen printing on varied substrates, including acetate and paper. The resulting printed features exhibit low sheet resistance and high mechanical flexibility, making them highly suitable for microsupercapacitors, energy storage electrodes, and high-performance EMI shielding applications.
In this talk, you can learn:
* How to utilize graphene aerogels as high-porosity scaffolds for single-atom catalyst deposition.
* The synthesis, structural dimensions, and electromechanical properties of MXene flakes exfoliated from MAX phases.
* Printing techniques for additive-free MXene inks to fabricate flexible sensors, energy storage electrodes, and EMI shielding structures.
📋 **Talk Abstract** In this talk, the speaker explores the fabrication and application of advanced 2D material networks, focusing on graphene aerogels and MXene-based composites. The presentation details how these nanomaterials are structured, functionalized, and printed to deliver high-performance solutions for fuel cells, flexible strain sensors, and printed electronics.
🎤 Speaker: Ricardo Oliveira
🏢 Company: 2DM
📅 Event: Graphene & 2D Materials 2021: End Users, Applications, Major Producers & Start Up 2021
📍 Location: TechBlick Platform Online
🌐 Learn more at the next TechBlick event: https://www.techblick.com
#FewLayerGraphene, #PolycarbonateComposites, #PolymerCompounding, #ElectrostaticDischarge, #ConductivePolymers, #AdditiveElectronics
14:58 - 16:22
Can true 2D graphene double the lifespan of marine anti-corrosive coatings?
How can structured 2D material networks overcome the performance trade-offs of conventional composites in energy and sensing applications?
In this presentation, the speaker discusses the development of highly porous 2D material aerogels designed as supporting structures for active components. By utilizing graphene and MXenes—a versatile class of transition metal carbides, nitrides, and carbonitrides—the speaker demonstrates how these foam-like architectures facilitate the deposition of metals, metal oxides, and polymers. This bottom-up single-atom deposition approach enables precise control over active material loading, significantly enhancing mass activity while reducing the required volume of precious catalysts.
The speaker also highlights the integration of MXene networks into flexible textile composites for high-sensitivity strain sensing. Unlike traditional strain gauges that struggle with low-percentage deformations, these water-based MXene coatings infiltrate cotton fibers to deliver homogeneous coverage, high electrical conductivity, and low thermal resistivity. This technology is shown to successfully distinguish subtle pressure variations and provide real-time feedback for gesture recognition systems.
Furthermore, the presentation addresses the processing and deposition versatility of additive-free MXene inks. The speaker details their performance across extrusion-based 3D printing and screen printing on diverse substrates, including acetate and paper. These printed networks achieve exceptionally low sheet resistance and outstanding electromagnetic interference (EMI) shielding performance, pointing toward scalable manufacturing routes for next-generation energy storage electrodes and micro-supercapacitors.
In this talk, you can learn:
* How to synthesize and functionalize 2D material aerogels to optimize pore accessibility and active site density for catalytic applications.
* Methods for formulating additive-free, water-based MXene inks suitable for extrusion and screen printing on flexible substrates.
* Techniques for integrating 2D materials into textiles to create highly sensitive, low-strain sensors and EMI shielding barriers.
📋 **Talk Abstract** In this talk, the speaker explores the design and application of structured 2D material networks, focusing on graphene and MXene-based aerogels and inks. The presentation details how these advanced materials are processed and deposited to enhance performance in fuel cell membrane electrode assemblies, flexible wearable sensors, and printed electronics.
🎤 Speaker: Ricardo Oliveira
🏢 Company: 2DM
📅 Event: Graphene & 2D Materials 2021: End Users, Applications, Major Producers & Start Up 2021
📍 Location: TechBlick Platform Online
🌐 Learn more at the next TechBlick event: https://www.techblick.com
#AntiCorrosiveCoatings, #FewLayerGraphene, #SaltSprayResistance, #DragReduction, #TwoDimensionalMaterials, #ProtectiveCoatings