What Are MXenes and Why They Could Rival Graphene

A New Class of 2D Wonder Materials

Graphene grabbed headlines as the miracle material of the 2010s—a single sheet of carbon atoms with extraordinary strength and conductivity. But a rival family of two-dimensional materials has been quietly gaining ground in laboratories worldwide. They are called MXenes (pronounced "max-eens"), and many researchers believe they could eventually surpass graphene in practical applications.

MXenes are atomically thin layers of transition metal carbides, nitrides, or carbonitrides. More than 30 different types have been synthesized so far, with hundreds more predicted computationally—making them potentially the largest class of 2D materials known to science.

How MXenes Were Discovered

The story begins with a happy accident. In 2011 at Drexel University in Philadelphia, PhD student Michael Naguib was testing a ceramic material called a MAX phase as a potential lithium-ion battery anode. When he applied concentrated hydrofluoric acid to titanium aluminium carbide (Ti₃AlC₂), the acid selectively etched away the aluminium layer, leaving behind ultra-thin sheets of titanium carbide.

The Drexel team—Naguib, Michel Barsoum, and Yury Gogotsi—recognized they had created something new. They named it MXene by combining "MX" (the layers left after removing the "A" from MAX phase) with the suffix "-ene," echoing graphene and other 2D materials.

What Makes MXenes Special

MXenes stand out because they combine several desirable properties in a single material:

• Metallic conductivity—they conduct electricity as well as metals, and unlike graphene, films made of overlapping MXene flakes retain the high conductivity of individual sheets.
• Tunable surface chemistry—their surfaces can be terminated with oxygen, hydroxyl, fluorine, chlorine, or other groups, allowing researchers to fine-tune behaviour for specific applications.
• Hydrophilicity—MXenes are naturally attracted to water, making them easy to process into inks, coatings, and composites without harsh solvents.
• Mechanical strength and flexibility—they are both strong and bendable, useful for wearable electronics and flexible devices.

A major breakthrough reported in Nature Synthesis demonstrated a new "triphasic" method using molten salts and iodine vapour to produce ultra-clean MXenes with perfectly ordered surfaces. The result: a 160-fold increase in electrical conductivity compared with conventionally made MXenes, along with a nearly fourfold boost in charge carrier mobility.

Where MXenes Are Being Used

Energy Storage

MXenes' high conductivity and excellent ion intercalation make them promising electrode materials for batteries and supercapacitors. Their layered structure allows lithium, sodium, and other ions to slip between sheets rapidly, enabling faster charging and higher energy density.

Electromagnetic Shielding

Even at minimal thicknesses, MXene films can block electromagnetic interference across a broad spectrum—from radio frequencies to terahertz waves. This makes them attractive for protecting sensitive electronics in smartphones, medical devices, and military equipment, as noted in research published in Nature Reviews Electrical Engineering.

Sensors and Medicine

MXenes' large surface area and chemical sensitivity make them effective in biosensors capable of detecting minute concentrations of biomarkers. Researchers are also exploring their use in targeted drug delivery and photothermal cancer therapy.

How Far Are MXenes From Everyday Life?

The MXene market is projected to grow from roughly $50 million in 2026 to $290 million by 2032, according to MarketsandMarkets, reflecting a compound annual growth rate of about 36%. Analysts at Chemical & Engineering News have compared MXenes' current trajectory to where graphene was roughly a decade ago—past the hype phase and entering serious commercial development.

Challenges remain. Scaling production while maintaining the purity needed for high performance is difficult. Oxidation in humid air can degrade MXene sheets over time, and the original synthesis methods required hazardous hydrofluoric acid, though newer techniques are eliminating that requirement.

Still, with over 30 compositions already made and hundreds more theoretically possible, MXenes offer a tunability that no single material can match. As synthesis methods improve and costs fall, these thin sheets of metal carbide may quietly become the backbone of next-generation electronics, energy systems, and sensors.