Unveiling the Multifunctional Potential of MXenes in Rechargeable Batteries beyond Electrode Active Materials

Abstract MXene materials have emerged as prominent candidates for revolutionizing energy storage technologies due to their unique properties and versatile applications. This review highlights the multifaceted roles of MXenes (beyond electrode active materials) in improving various components of rechargeable batteries. MXenes exhibit exceptional electrical conductivity, tunable surface functionalities, and a 2D structure, rendering them suitable for enhancing electrode or electrolyte materials, current collectors, binders, and separators. As electrode hosts, MXenes accommodate active materials such as sulfur, silicon, selenium, and novel compounds, addressing challenges related to volume expansion, electronic conductivity, and chemical interactions. Furthermore, MXene‐based conductive agents and additives ameliorate the stability and performance of solid‐state devices, overcoming issues associated with flammable liquid electrolytes. MXene materials excel as current collectors by improving contact between active materials, mitigating dendrite formation, extending battery lifespan, and improving safety. Additionally, MXene‐modified separators and interlayers effectively hinder the shuttle effect and dendrite growth in Li‐S and other battery systems with stability and longevity. With their distinct attributes to offer transformative opportunities for addressing limitations in next‐generation rechargeable batteries, MXenes hold the promise of shaping a more efficient, secure, and sustainable energy storage landscape.