Carbon Quantum Dots in Energy Storage
Abstract
Zero-dimensional (0D) carbon quantum dots (CQDs) have attracted significant attention due to their nontoxicity, tunable photoluminescence, chemical stability, biocompatibility, low cost, and ease of surface functionalization. These properties enable applications in biomedicine, drug delivery, sensing, optoelectronics, photocatalysis, and energy storage. In supercapacitors, batteries, and hybrid systems, CQDs contribute to enhance charge storage by improving ion transport, increasing active sites, and boosting conductivity. In hybrid systems, CQDs help achieve both high energy and power densities, with minimal environmental impact. This chapter explores on the role of CQDs-based composites in electrochemical systems, highlighting their mechanisms, contributions to energy storage devices, and the challenges and future prospects for real-world application.
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