Conductive two-dimensional titanium carbide ‘clay’ with high volumetric capacitance
Michael Ghidiu, Maria R. Lukatskaya,Meng-Qiang Zhao,Yury Gogotsi & Michel W. Barsoum
Nature(2014)doi:10.1038/nature13970
Safe and powerful energy storage devices are becoming increasingly important. Charging times of seconds to minutes, with power densities exceeding those of batteries, can in principle be provided by electrochemical capacitors—in particular, pseudocapacitors. Recent research has focused mainly on improving the gravimetric performance of the electrodes of such systems, but for portable electronics and vehicles volume is at a premium. The best volumetric capacitances of carbon-based electrodes are around 300 farads per cubic centimetre; hydrated ruthenium oxide can reach capacitances of 1,000 to 1,500 farads per cubic centimetre with great cyclability, but only in thin films.
Recently, electrodes made of two-dimensional titanium carbide (Ti3C2, a member of the ‘MXene’ family), produced by etching aluminium from titanium aluminium carbide (Ti3AlC2, a ‘MAX’ phase) in concentrated hydrofluoric acid, have been shown to have volumetric capacitances of over 300 farads per cubic centimetre. Here we report a method of producing this material using a solution of lithium fluoride and hydrochloric acid. The resulting hydrophilic material swells in volume when hydrated, and can be shaped like clay and dried into a highly conductive solid or rolled into films tens of micrometres thick. Additive-free films of this titanium carbide ‘clay’ have volumetric capacitances of up to 900 farads per cubic centimetre, with excellent cyclability and rate performances. This capacitance is almost twice that of our previous report8, and our synthetic method also offers a much faster route to film production as well as the avoidance of handling hazardous concentrated hydrofluoric acid.
Source: www.nature.com
The seminar, titled “MXenes for Space and High-Tech Applications: From Scalable Synthesis to Smart Structures, Sensors, and Advanced Bio-Composites,” brought together researchers interested in the development and application of advanced nanomaterials. The presentation covered recent progress in MXene technology, with a particular focus on scalable synthesis and the integration of MXenes into smart structures, sensors, advanced electronics, multifunctional composites, and space technologies.
The study, “Green-Synthesized MXenes Enable Low-Friction, Cytocompatible PVA-Chitosan Hydrogels,” explores the incorporation of HF-free, green-synthesized Ti₃C₂Tₓ MXenes into polyvinyl alcohol (PVA)-chitosan hydrogels. The research demonstrates that this combination can produce highly hydrated, mechanically enhanced, cytocompatible materials with significantly improved tribological properties.
Our collaborative work on porous Ti₃AlC₂ MAX phase for efficient Ti₃C₂Tₓ MXene synthesis has been ranked among the Top 10 most cited papers in the International Journal of Applied Ceramic Technology (IJACT).
We highly recommend checking out new important paper: “Critical Assessment of Intrinsic Antibacterial Properties and Photothermal Therapy Potential of MXene Nanosheets.” Along with the key findings, we’re also excited to share the Supplementary Cover Art — it beautifully illustrates our vision of MXene-based targeted complexes that can eliminate bacteria via photothermal conversion under near-infrared irradiation.
Do MXene nanosheets possess intrinsic antibacterial activity? A systematic study of high-quality Ti-, V-, and Nb-based MXenes reveals negligible inherent antimicrobial effects while highlighting their strong potential for targeted photothermal antibacterial therapy.
Highlights
We are excited to share that our Carbon-Ukraine (Y-Carbon LLC) company participated in the I2DM Summit and Expo 2025 at Khalifa University in Abu-Dhabi! Huge thanks to Research & Innovation Center for Graphene and 2D Materials (RIC2D) for hosting such a high-level event.It was an incredible opportunity to meet brilliant researchers and innovators working on the next generation of 2D materials. The insights and energy from the summit will definitely drive new ideas in our own development.
Carbon-Ukraine team had the unique opportunity to visit XPANCEO - a Dubai-based deep tech startup company that is developing the first smart contact lenses with AR vision and health monitoring features, working on truly cutting-edge developments.
Our Carbon-Ukraine team (Y-Carbon LLC) are thrilled to start a new RIC2D project MX-Innovation in collaboration with Drexel University Yury Gogotsi and Khalifa University! Amazing lab tours to project collaborators from Khalifa University, great discussions, strong networking, and a wonderful platform for future collaboration.
MXenes potential applications include sensors, wound healing materials, and drug delivery systems. A recent study explored how different synthesis methods affect the safety and performance of MXenes. By comparing etching conditions and intercalation strategies, researchers discovered that fine-tuning the surface chemistry of MXenes plays a crucial role in improving biocompatibility. These results provide practical guidelines for developing safer MXenes and bring the field one step closer to real biomedical applications.
An excellent review highlighting how MXene-based sensors can help tackle one of today’s pressing environmental challenges — heavy metal contamination. Excited to see such impactful work moving the field of environmental monitoring and sensor technology forward!
Carbon-Ukraine team was truly delighted to take part in the kickoff meeting of the ATHENA Project (Advanced Digital Engineering Methods to Design MXene-based Nanocomposites for Electro-Magnetic Interference Shielding in Space), supported by NATO through the Science for Peace and Security Programme.