Table 1.

Time constants obtained from fitting the EOS data with exponential decay functions (Fig. S8)

	τ1 (μs) ± SD	τ2 (μs) ± SD	χ2
Na-MnO2
Water	0.36 ± 0.03	15.31 ± 0.96	11.03
TPA	0.36 ± 0.04	14.38 ± 1.32	18.68
Nafion	0.24 ± 0.02	10.14 ± 0.63	12.68
Ca-MnO2
Nafion	0.81 ± 0.06	27.35 ± 1.75	6.53

A time offset of 0.047 μs was used for all data.