A review of electrolyte materials and compositions for electrochemical supercapacitors. (8th June 2015)

• Record Type: Journal Article
• Authors: Zhong, Cheng; Deng, Yida; Hu, Wenbin; Qiao, Jinli; Zhang, Lei; Zhang, Jiujun
• Is Part Of: Chemical Society reviews. Volume 44:Number 21(2015:Nov.)
• Page Start: 7484
• Page End: 7539
• Publication Date: 2015-06-08
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1039/c5cs00303b
• Languages: English
• ISSNs: 0306-0012

Abstract

Abstract : Electrolytes have been identified as some of the most influential components in the performance of electrochemical supercapacitors (ESs), which include: electrical double-layer capacitors, pseudocapacitors and hybrid supercapacitors. This paper reviews recent progress in the research and development of ES electrolytes. Abstract : Electrolytes have been identified as some of the most influential components in the performance of electrochemical supercapacitors (ESs), which include: electrical double-layer capacitors, pseudocapacitors and hybrid supercapacitors. This paper reviews recent progress in the research and development of ES electrolytes. The electrolytes are classified into several categories, including: aqueous, organic, ionic liquids, solid-state or quasi-solid-state, as well as redox-active electrolytes. Effects of electrolyte properties on ES performance are discussed in detail. The principles and methods of designing and optimizing electrolytes for ES performance and application are highlighted through a comprehensive analysis of the literature. Interaction among the electrolytes, electro-active materials and inactive components (current collectors, binders, and separators) is discussed. The challenges in producing high-performing electrolytes are analyzed. Several possible research directions to overcome these challenges are proposed for future efforts, with the main aim of improving ESs' energy density without sacrificing existing advantages ( e.g., a high power density and a long cycle-life) (507 references).