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New Insights into the Operating Voltage of Aqueous Supercapacitors
Author(s) -
Yu Minghao,
Lu Yongzhuang,
Zheng Haibing,
Lu Xihong
Publication year - 2018
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201704420
Subject(s) - supercapacitor , voltage , aqueous solution , electrolysis , electrolyte , materials science , high voltage , computer science , electrode , electrical engineering , electrochemistry , engineering , chemistry
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.