Recent advances in MXene-based composites for piezoelectric sensors.

Piezoelectric sensors are crucial in medical, industrial, and consumer electronics applications, yet their performance and sensitivity often fall short due to the limitations in current piezoelectric materials. To address these deficiencies, significant research has been directed towards developing composite materials that enhance piezoelectric properties by integrating piezoelectric materials with various fillers. MXenes, a novel class of 2D transition metal carbides/nitrides, exhibit remarkable properties such as high electrical conductivity, mechanical strength, and chemical stability. These characteristics, along with a high surface area and hydrophilicity, make MXenes an ideal additive for preparing piezoelectric composites with improved properties. Despite existing reviews on MXenes in sensor applications, only a few have systematically explored their role in piezoelectric sensors. This review provides a comprehensive analysis of MXene-based piezoelectric sensors, examining the impact of different composites on piezoelectric properties, synthesis methods, structural designs, and application areas. While promising, challenges such as scalability, reproducibility, and environmental stability must be addressed to fully realize the potential of MXene-based composites. This comprehensive analysis highlights the advancements, opportunities for further development, and the transformative potential of MXenes in the next generation of high-performance, multifunctional piezoelectric sensors.