The Supercapacity of Supercapacitors
Research investigates new niobium-based materials for improving electrical energy storage
The search for clean and renewable energy sources has intensified in recent years, due to the continuous increase in the concentration of greenhouse gases in the atmosphere, such as carbon dioxide. Also part of this search is the development of new systems to store and supply energy for various applications, from electric cars and buses to portable electronics. Thus, devices such as lithium batteries, flow batteries and supercapacitors are studied to meet these new demands.
Supercapacitors are a class of energy storage devices that combine the properties of batteries (high storage capacity) and capacitors (ultra-fast charging and power supply), tolerating many charge and discharge cycles. However, this type of device still has several drawbacks: the energy storage capacity is lower than that of conventional batteries; the observed voltage discharge curve can prevent the use of all stored energy; and in some cases, a high self-discharge is verified.