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Asymmetric Supercapacitor Electrodes and Devices
Author(s) -
Choudhary Nitin,
Li Chao,
Moore Julian,
Nagaiah Narasimha,
Zhai Lei,
Jung Yeonwoong,
Thomas Jayan
Publication year - 2017
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201605336
Subject(s) - supercapacitor , materials science , energy storage , nanotechnology , energy density , explosive material , power density , fabrication , electronics , engineering physics , durability , electrode , electrical engineering , power (physics) , capacitance , engineering , composite material , medicine , chemistry , physics , alternative medicine , organic chemistry , quantum mechanics , pathology
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.