Piezoelectric-Driven Self-Powered Supercapacitor for Wearable Device Applications

Abstract

Supercapacitors are the most promising energy storage devices that bridge the gap between capacitors and batteries. They can reach energy density close to the batteries and power density to the conventional capacitors. Several kinds of research have been carried out in the field of supercapacitors for the development of promising electrode and electrolyte materials as well as device fabrications to breakthrough in energy storage systems with diverse applications in electronics. They have a broad range of applications as they can deliver a huge power within a very short time. The applications of supercapacitors in several sectors like consumer and portable electronics, transportation and vehicles, power backup, biomedical, military, aerospace, etc.

Nonflammable Supramolecular Polymer Electrolytes for Flexible and High-Performance Supercapacitor Applications

“…Owing to the growing need for energy-efficient and environmentally friendly products, considerable research effort has recently been dedicated to the development of supercapacitors (SCs) 1,2 given that their capacity and charging/discharging rate substantially exceed those of the conventional capacitors and batteries, respectively. 3,4 At present, SCs are mostly utilized in low-power load applications, such as video recorders, mobile phones, and notebook computers, 5 but can also be employed under high-power load conditions commonly encountered in electric vehicle power systems. 6,7 As their energy storage performance primarily depends on the type of the electrolyte used, a wide range of electrolytes have been considered in both research and practice.…”

“…Owing to the growing need for energy-efficient and environmentally friendly products, considerable research effort has recently been dedicated to the development of supercapacitors (SCs) , given that their capacity and charging/discharging rate substantially exceed those of the conventional capacitors and batteries, respectively. , At present, SCs are mostly utilized in low-power load applications, such as video recorders, mobile phones, and notebook computers, but can also be employed under high-power load conditions commonly encountered in electric vehicle power systems. , As their energy storage performance primarily depends on the type of the electrolyte used, a wide range of electrolytes have been considered in both research and practice. The findings yielded indicate that conventional liquid electrolytes, while possessing high ionic conductivity, have several drawbacks, such as difficult packaging, easy leakage, low reliability, corrosion, toxicity, and poor low-temperature performance. − Even though these issues can be mitigated by using solid electrolytes, the ionic conductivity will still remain low, thus compromising the electrochemical function of the whole device. − …”