AbstractEvery once in a while, a revolutionary technological development arises, which leads to a significant change in the way to approach research and push development efforts. The appetite for new technology compels society to look for game‐changing materials, that can transform the industry and make advances. Sustainable energy production is paramount to addressing the climate crisis, and energy generation and storage play an important role in the development of self‐powered microelectronic devices. The 2D materials, MXenes have emerged as promising candidates for energy and other applications owing to their inherent electrical merits, high specific surface area, and tunable properties. Particularly, in the context of additive and interfacial materials for perovskite solar cell fabrication and utilization as additives in secondary batteries, this review delves into the application of MXenes in such devices. The protocols of MXenes and their nanostructures tailoring toward such applications and, the underlying mechanism is uncovered. Further, the existing challenges and direction for future in MXene‐based energy harvesters are discussed.