Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 24, Issue 15, Pages 3639-3649Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201704420
Keywords
aqueous supercapacitors; asymmetric supercapacitors; electrolyte decomposition; operating voltage; potential range
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Funding
- Natural Science Foundation of China [21403306]
- Science and Technology Projects of Jiangmen [(2017) 307, (2017) 149]
- Tip-top Scientific and Technical Innovative Youth Talents of Guangdong Special Support Program [2015TQ01C205]
- Training Program of Scientific and Technological Innovation for Undergraduates [pdjh2016a0007, pdjh2016a0006]
- Pearl River SAMP
- T Nova Program of Guangzhou [201610010080]
- Guangdong Natural Science Funds for Distinguished Young Scholar [2014A030306048]
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The main limitation of aqueous supercapacitors (SCs) lies in their narrow operating voltages, especially when compared with organic SCs. Fundamental understanding of factors relevant to the operating voltage helps providing guidance for the assembly of high-voltage aqueous SCs. In this regard, this concept analyzes the deciding factors for the operating voltage of aqueous SCs. Strategies applied to expand the operating voltage are summarized and discussed from the aspects of electrolyte, electrode, and asymmetric structure. Dynamic factors associated with water electrolysis and maximally using the available potential ranges of electrodes are particularly emphasized. Finally, other promising approaches that have not been explored and their challenges are also elaborated, hoping to provide more insights for the design of high-voltage aqueous SCs.
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