MXenes, a class of two-dimensional transition metal carbides and nitrides, have garnered significant attention in recent years as promising materials for energy-related applications. Their unique combination of properties, including exceptional electronic conductivity, impressive ionic conductivity, a large specific surface area, and highly tunable surface chemistries, make them highly versatile for a wide range of advanced energy technologies. These properties not only enhance energy storage and conversion efficiency but also allow for precise control over their performance characteristics by tailoring their preparation and material characteristics.

In this presentation, I will highlight the latest advancements from our group that leverage the exceptional properties of MXenes to develop innovative energy harvesting and storage devices. Our research explores a broad spectrum of applications, demonstrating the versatility of MXenes in addressing challenges across various domains of energy technology.

Specifically, I will discuss the integration of MXenes into commercial-scale silicon heterojunction solar cells, where we show they can replace expensive silver back contacts. I will also present our work on MXene use in salinity gradient energy harvesters, which exploit ionic conductivity and surface functionality for efficient energy extraction from saltwater gradients. Furthermore, our work in thermoelectric nanogenerators showcases how MXenes contribute to converting waste heat into electrical energy by optimizing thermal and electronic transport properties.

Additionally, MXenes have been demonstrator in triboelectric nanogenerators, where their mechanical robustness and electronic conductivity enable efficient energy harvesting from mechanical motion. Their role in ultrasound energy devices will also be highlighted, with a focus on their unique ability to convert acoustic energy into usable electrical energy.

Finally, I will present our advancements in integrating MXenes into microsupercapacitors, which combine high energy density and power density for next-generation compact energy storage solutions. These integrated devices demonstrate the ability to pair energy harvesting with storage, paving the way for self-powered electronic systems.

This comprehensive exploration underscores the transformative potential of MXenes in energy applications and highlights their role as key enablers of sustainable and efficient energy technologies. Through the examples presented, I aim to showcase the versatility and impact of MXenes in shaping the future of energy harvesting and storage devices.