Pushing the limits of lithium bis(oxalate)borate/acetonitrile using 1-ethyl-3-methylimidazolium tetrafluoroborate for supercapacitors

Supercapacitors provide us with enormous power output for energy storage. Their energy output however still remains quite low compared to other energy storage materials like the batteries. This paper reports a highly stable liquid electrolyte which is composed of mixtures of 1-ethyl-3-methylimidazol...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Current applied physics 2017, 17(12), , pp.1639-1645
Hauptverfasser: Hamenu, Louis, Madzvamuse, Alfred, Hu, Mengyang, Mohammed, Latifatu, Bon, Chris Yeajoon, Kim, Sang Jun, Cho, Won Il, Park, Jongwook, Ko, Jang Myoun
Format: Artikel
Sprache:eng
Schlagworte:
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:Supercapacitors provide us with enormous power output for energy storage. Their energy output however still remains quite low compared to other energy storage materials like the batteries. This paper reports a highly stable liquid electrolyte which is composed of mixtures of 1-ethyl-3-methylimidazolium tetrafluoroborate(EMIBF4) ionic liquid with highly stable lithium bis(oxalate)borate LiBOB/acetonitrile(ACN). The electrolytes display remarkable supercapacitive performance at a high voltage of 3 V. The electrochemical impedance spectroscopy shows that EMIBF4 helps to reduce the bulk resistance and charge transfer resistance across the electrode surfaces by facilitating high ionic diffusions across the electrode/electrolyte interface. The high stability and high ionic conductivity of the electrolytes reflected in the good cycling performance tests at 2.8 V with a maximum delivery capacitance of 19.5Fg-1 after 1000cycles at a high scan rate of 200 mVs-1. •A highly stable electrolyte based on 1-ethyl-3-methylimidazolium tetrafluoroborate and lithium bis(oxalate)borate/acetonitrile was prepared.•The electrolyte showed the high ionic conductivity and potential stability until 3V with remarkable supercapacitive performance.
ISSN:1567-1739
1878-1675
DOI:10.1016/j.cap.2017.09.010