Jae Jong Byun | Nanoplexus Limited: Can single-atom catalyst deposition on graphene aerogels finally make hydrogen fuel cells commercially viable?
00:03:19 - 00:04:33
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Can single-atom catalyst deposition on graphene aerogels finally make hydrogen fuel cells commercially viable?
Developing cost-effective and highly durable Membrane Electrode Assemblies (MEAs) remains one of the primary hurdles for the widespread adoption of hydrogen fuel cells and electrolyzers. Conventional designs rely on heavy loadings of expensive platinum catalysts, which suffer from rapid degradation and poor utilization rates over extended operational cycles.
To address this bottleneck, Nanoplexus utilizes highly porous graphene aerogels as advanced support structures. By applying a bottom-up, single-atom deposition technique, they can precisely decorate the aerogel matrix with platinum. This approach radically increases the mass activity of the catalyst while significantly reducing the overall platinum loading required.
Furthermore, by tuning the surface chemistry and functional groups of the graphene aerogel, the team has achieved remarkable durability. The resulting MEAs exhibit a minimal performance degradation of only 7% to 10% after 4,000 hours of continuous operation. This chemical optimization directly translates to a highly favorable cost-to-performance ratio for next-generation clean energy systems.
In this short video, you can learn:
* How highly porous graphene aerogels serve as superior supporting structures for membrane electrode assemblies.
* The mechanism of bottom-up single-atom platinum deposition to dramatically decrease catalyst loading and boost mass activity.
* Methods for tuning graphene functional groups to secure exceptional electrochemical durability under 4,000 hours of testing.
📋 **Clip Abstract**
This clip explains how Nanoplexus leverages tuned graphene aerogels and single-atom platinum deposition to design high-performance MEAs for fuel cells. This material strategy dramatically lowers precious metal loading while maintaining exceptional durability over thousands of hours of operation.
#GrapheneAerogels, #SingleAtomDeposition, #MembraneElectrodeAssemblies, #PlatinumCatalysts, #HydrogenFuelCells, #ElectrolyzerTechnology
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00:04:45 - 00:06:04
Why do traditional strain gauges fail at low-percentage deformations, and how can MXene-dyed cotton solve it?
Why do traditional strain gauges fail at low-percentage deformations, and how can MXene-dyed cotton solve it?
Flexible and soft electronic sensors require high mechanical compliance to integrate seamlessly into wearable devices, skin-mounted electronics, and robotic manipulators. However, conventional metallic or semiconductor strain gauges face a major limitation: while they can measure large deformations, they lack the sensitivity needed to detect subtle strains below 5%.
By utilizing MXenes—a class of 2D transition metal carbides and nitrides—researchers can bypass these sensitivity limits. Nanoplexus demonstrates this by dip-coating standard cotton fiber textiles in an aqueous, 1 wt% MXene suspension without any polymer binders. Due to the ultra-thin nature of the 1-to-3-layer flakes, the MXenes easily infiltrate deep into the fibrous network.
The resulting MXene-textile composite exhibits superb electrical conductivity, low thermal resistivity, and highly responsive piezoresistive behavior. This advanced material configuration is so sensitive that it can easily resolve and distinguish the minimal pressure of a penny from the direct force of a finger.
In this short video, you can learn:
* The structural limitations of traditional strain gauges in detecting ultra-low strains under 5%.
* How the low thickness and high aspect ratio of MXene flakes allow for homogenous infiltration into cotton fabrics.
* The performance of binder-free MXene textile sensors in resolving subtle tactile pressures for soft electronics.
📋 **Clip Abstract**
This clip details the fabrication of highly sensitive flexible sensors by dip-coating cotton textiles in a 1 wt% water-based MXene solution. The resulting composite achieves exceptional conductivity and sensitivity, allowing it to detect subtle low-percentage strains that defeat conventional sensors.
#MXenes, #PiezoresistiveSensors, #MXeneTextiles, #LowStrainSensing, #SmartTextiles, #FlexibleElectronics
00:08:01 - 00:08:51
How can a completely additive-free 2D ink achieve screen-printed sheet resistance as low as 0.1 ohms per square?
How can a completely additive-free 2D ink achieve screen-printed sheet resistance as low as 0.1 ohms per square?
Conductive inks are essential for printing flexible electronics, antennas, and electromagnetic shielding, but most options rely heavily on polymeric binders and surfactants. These additives are necessary to stabilize the metallic nanoparticles or carbon networks in suspension, but they inevitably degrade the final electrical conductivity and require high-temperature post-processing.
Nanoplexus circumvents this trade-off by engineering a highly stable, completely water-based MXene ink that contains zero additives. The inherent hydrophilic surface terminations of MXene flakes prevent aggregation in water while maintaining excellent rheological properties. This pure ink formulation can be applied directly to diverse substrates, ranging from flexible acetate films to standard paper.
When screen-printed, the binder-free MXene ink achieves an incredibly low sheet resistance as low as 0.1 ohms per square. Furthermore, this high conductivity translates directly to superior electromagnetic interference (EMI) shielding, delivering an outstanding shielding performance of 96 decibels across the 2 to 14 gigahertz frequency range.
In this short video, you can learn:
* Why additive-free formulation is a critical milestone for maximizing the electrical conductivity of 2D material inks.
* The printing versatility of MXene inks on challenging substrates like acetate films and paper without binders.
* The outstanding performance metrics of screen-printed MXene coatings in low-resistivity and high-frequency EMI shielding.
📋 **Clip Abstract**
This clip highlights the performance of Nanoplexus's additive-free, water-based MXene inks for screen printing applications. The formulation achieves ultra-low sheet resistance and exceptional electromagnetic interference shielding without the need for performance-degrading binders.
#MXeneInks, #BinderFreeInk, #EMIShielding, #2DMaterials, #PrintedElectronics, #FlexibleElectronics