TY  - JOUR
T1  - Pushing the limits of lithium bis(oxalate)borate/acetonitrile using 1-ethyl-3-methylimidazolium tetrafluoroborate for supercapacitors
AU  - Hamenu, Louis
AU  - Madzvamuse, Alfred
AU  - Hu, Mengyang
AU  - Mohammed, Latifatu
AU  - Bon, Chris Yeajoon
AU  - Kim, Sang Jun
AU  - Cho, Won Il
AU  - Park, Jongwook
AU  - Ko, Jang Myoun
JO  - Current Applied Physics
VL  - 17
IS  - 12
SP  - 1639
EP  - 1645
PY  - 2017
DA  - 2017/12/01/
SN  - 1567-1739
DO  - https://doi.org/10.1016/j.cap.2017.09.010
UR  - https://www.sciencedirect.com/science/article/pii/S1567173917302614
KW  - Lithium bis(oxalate)borate
KW  - Electyrolyte
KW  - Supercapacitors
KW  - Ionic liquid
AB  - 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.
ER  -