Carbon nanotubes (CNTs), with their notable electric conductivity, mechanical electricity, and high surface region, have emerged as essential materials in the design of high-overall-performance electricity garage devices. Their particular one-dimensional structure facilitates rapid electron/ion shipping, enhances electrode structure, and comprises volumetric changes, making them valuable in lithium-ion, lithium–sulfur, and metal air batteries and bendy super capacitors. CNTs have shown extensive improvements in power density, cycle lifestyles, and fee functionality either used for my part or in hybrid structures with graphite, metal oxides, and conductive polymers. Despite these benefits, several challenges hinder the large-scale software of CNTs. These encompass high manufacturing costs, poor dispersion in composites, weak interfacial bonding with energetic materials, and aggregation for the duration of fabrication, which adversely influences electrochemical overall performance and reproducibility. To triumph over those barriers, researchers are employing scalable and eco-friendly synthesis strategies, consisting of optimized chemical vapor deposition (CVD), and refining post-treatment approaches to improve purity and shape. Surface functionalization—each covalent and non-covalent improves compatibility with different materials, even as hybridization techniques beautify electrical pathways and structural integrity. Recent advances in CNT-based composites show their ability to suppress polysulfide shuttling in Li–S structures, boost electrolyte accessibility in bendy super capacitors, and increase mechanical and electrochemical stability beneath high-performance conditions. The use of 3D CNT frameworks and vertically aligned nanotube arrays has enabled the improvement of high-loading, binder-unfastened electrodes with superior ion accessibility. Additionally, CNTs display strong compatibility with emerging stable-nation and gel-based electrolytes, beginning new paths toward compact, safer strength devices.