Abstract
A novel oxygen containing spiro ammonium salt, oxazolidine-3-spiro-1’-pyrrolidinium tetrafluoroborate (OPBF 4) was synthesized using an innovative technique for use as electrolyte in electrochemical double layer capacitors (EDLC). Comparison of OPBF 4 with commercially available, tetraethyl ammonium tetrafluoroborate (TEABF 4) showed higher voltage window and higher capacitance for the OPBF 4 compound. Moreover, molarity of 3 M was produced with OPBF 4 as compared to a maximum of 1.5 M for TEABF 4 in acetonitrile (AN). This is especially important to enable the fabrication of higher energy density EDLC. This is the first report of testing OPBF 4 compound in an EDLC device, and it qualifies as a reasonable alternative to TEABF 4 for high performance ultracapacitors.
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