KOSEN 한인과학기술자네트워크

1. Introduction
2. Distinction between Terminologies Used
3. Selection of Electrode Materials
4. Negative Electrode Materials (Anode)
5. Positive Electrode Materials (Cathode)
6. Emerging 2D Supercapacitor Electrodes
7. Devices
8. Conclusions and Outlook

수퍼커패시터는 순간적인 파워는 크지만 에너지 밀도의 한계를 가진다. 의사 커패시터라 불리는 소자는 산화환원반응에 의한 에너지 축전 소자로서 이러한 한계를 보완할 수 있지만 반복적인 산화환원의 화학반응으로 부식의 염려가 있다. 이러한 두 소자의 장점을 엮어 고성능 에너지 축전 소자를 만들고자 한 것이 비대칭 수퍼커패시터이다. 본 자료를 통해 관련된 소자를 소개한다.

The world is recently witnessing an explosive development of novel electronic
and optoelectronic devices that demand more-reliable power sources that
combine higher energy density and longer-term durability. Supercapacitors
have become one of the most promising energy-storage systems, as they present
multifold advantages of high power density, fast charging？discharging,
and long cyclic stability. However, the intrinsically low energy density inherent
to traditional supercapacitors severely limits their widespread applications,
triggering researchers to explore new types of supercapacitors with improved
performance. Asymmetric supercapacitors (ASCs) assembled using two
dissimilar electrode materials offer a distinct advantage of wide operational
voltage window, and thereby significantly enhance the energy density. Recent
progress made in the field of ASCs is critically reviewed, with the main focus
on an extensive survey of the materials developed for ASC electrodes, as well
as covering the progress made in the fabrication of ASC devices over the last
few decades. Current challenges and a future outlook of the field of ASCs are
also discussed.