Figure 3
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The specific capacitance and highest cutoff voltage of different ILs with varying water contents for supercapacitors. Specific capacitance as a function of water content under different current densities for (a) [C2mim][TFO], (b) [C2mim][DCA], (c) [C2mim][BF4], (d) [C2mim][FSI], and (e) [C2mim][TFSI]. (f) The evolution of the highest cutoff voltage for the IL with varying contents when applied in supercapacitors.
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