Nanocomposites Utilizing Carbon Quantum Dots for Lithium Energy Storage and Transformation

Abstract

In the dynamic realm of energy use, the pursuit of practical and environmentally friendly energy storage technologies is paramount. The growing need for portable electronic devices, electric cars, and the integration of renewable energy into the power grid drives the urgency. Lithium-based energy storage systems have emerged as leading contenders among the vast array of available options due to their high energy density and comparatively extended cycle life. Nevertheless, these systems are full of obstacles, including issues related to safety and the constrained availability of resources. To tackle these concerns and advance the field of energy storage, incorporating nanomaterials has attracted considerable interest. This research explores the domain of energy storage, with a particular focus on the significance of Lithium Energy Storage Systems (LESS). This study examines the potential of nanoscale components and materials in changing energy storage, namely Carbon Quantum Dots (CQDs). Due to their remarkable characteristics, CQDs provide a potential pathway for improving energy storage devices. However, current energy storage techniques need help regarding energy density, cycle life, and sustainability. This research presents a unique strategy using Carbon Quantum Dots for a Lithium Energy Storage System (CQD-LESS). This novel approach leverages the unique characteristics of CQDs to address these obstacles directly. CQD-LESS has many advantages, including increased energy density, extended cycle life, and greater sustainability. The experimental results yielded average capacity retention of 158.35%, a charge transfer resistance of 4.21 ohms, a cyclic stability of 94.06%, an energy density of 123.30 Wh/kg, a power density of 157.30 W/kg, an Electrochemical Impedance Spectroscopy (EIS) frequency of 1233.00 Hz, a specific capacity of 337.50 mAh/g, and an average operating temperature of 28.10°C.