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Novel ionic liquid based electrolyte for double layer capacitors with enhanced high potential stability
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Novel ionic liquid based electrolyte for double layer capacitors with enhanced high potential stability
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Journal Article
Novel ionic liquid based electrolyte for double layer capacitors with enhanced high potential stability
2016
Overview
Developing electrolyte with high electrochemical stability is the most effective way to improve the energy density of double layer capacitors （DLCs）, and ionic liquid is a promising choice. Herein, a novel ionic liquid based high potential electrolyte with a stabilizer, succinonitrile, was proposed to improve the high potential stability of the DLC. The electrolyte with 7.5 wt% succinonitrile added has a high ionic conductivity of 41.1 mS cm-1 under ambient temperature, and the DLC adopting this electrolyte could be charged to 3.0 V with stable cycle ability even under a discharge current density of 6 A g-1. Moreover, the energy density could be increased by 23.4% when the DLC was charged to 3.0 V compared to that charged to 2.7 V.
