Metal Alloy-Based Electrodes for Supercapacitors Energy Storage

Supercapacitors are electrochemical energy storage devices known for their high-power density, rapid charge/discharge rates, environmental friendliness, low cost, and long cycle life. Despite these advantages, their low energy density, complex fabrication processes, and high costs have hindered their widespread application. To address these challenges, the development of efficient, cost-effective, and environmentally friendly electrode materials with optimised pore structures and adjustable surface chemical properties is crucial for advancing supercapacitor technology. This chapter discusses various types of supercapacitors, electrode materials, and key performance parameters for supercapacitors. A particular focus is placed on metal alloy-based electrodes, exploring different metal combinations, heterostructures, electrode reactions, and the synergistic effects in these materials. Additionally, strategies to enhance the performance of alloy-based electrodes are presented, including the construction of multimetal systems, defect structure design, and nanoporous heterostructure development. By considering factors such as surface area, cost, cyclability, and environmental impact, advanced alloy-based materials can be further developed for high-performance supercapacitors.