Multifunctional MXene inks for printed electrochemical energy storage devices

Since the discovery of MXenes, the family has expanded rapidly in the past decade. With their fascinating properties, including high electrical conductivity, solution processability, tunable surface functionality, and excellent mechanical properties, MXenes have garnered significant enthusiasm from the academic community and industrial relevance. The most extensively studied of the many applications for MXene-based devices is electrochemical energy storage (EES). Importantly, MXene inks allow quick yet efficient production of personal EES devices through additive manufacturing. However, there are relatively few comprehensive summaries of reports on the processing of MXene inks for EES devices. This paper provides a comprehensive review of MXene synthesis, additive manufacturing strategies and the latest advancements in the printing of MXene-based high-performance EES devices including micro-supercapacitors and batteries. Besides, the current challenges for high precision and high-performance printing technology are also discussed. This review is expected to provide valuable insights for solution processing of MXene inks and may shed light on the large-scale application of MXenes toward the next generation of wearable electronics.