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Research Article

Ultrafast Synthesis of Calcium Vanadate for Superior Aqueous Calcium-Ion Battery

Figure 6

Electrochemical impedance spectroscopy measurements of a CaV6O16·7H2O (CVO) electrode in 4.5 M Ca(NO3)2 at pH 10 electrolyte. (a) EIS analysis at different potentials at the 3rd discharge (reduction) cycle. (b) Change of the real part of the impedance versus the square root of the reverse of the pulsation ω−1/2 in the low-frequency region (from 10 to 32 mHz) recorded at -0.6 V during the 3rd discharge cycle.

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