Progress and Emerging Architectures of MXene‐Based Electrodes for Advanced Supercapacitors

Two‐dimensional MXenes have emerged as leading candidates for advanced supercapacitors, leveraging their metallic conductivity, controllable surface functionalities, and layered morphology for rapid ion diffusion. Despite these inherent advantages, realizing their full potential is hindered by challenges such as nanosheet restacking, limited interlayer spacing, and long‐term electrochemical instability. To overcome these limitations, research has shifted beyond basic material tuning to focus on the rational design of advanced electrode architectures. This review consolidates the state‐of‐the‐art progress in this architectural evolution, highlighting cutting‐edge strategies including: engineered intercalation/deintercalation systems for tunable interlayer spacing; hierarchical nanostructuring to create 3D porous frameworks; and hybridization with polymers, metals, and biomass‐derived carbons. We also examine the critical role of atomic‐level tailoring through heteroatom doping and defect modulation, alongside the accelerating influence of machine learning and computational modeling for predictive design. Finally, we address critical challenges related to oxidation stability, scalability, and environmental safety, offering a perspective on future opportunities where these advanced architectures can transform MXene‐based supercapacitors into sustainable, high‐performance energy storage technologies.