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This supplementary information presents detailed experimental data supporting the research on mixed addenda polyoxometalate solutions for stationary energy storage. Included are infrared spectra, cyclic voltammetry data, and phosphorus-31 NMR results that highlight changes in the electrochemistry of the active material. Figures include the infrared spectra of the polyoxometalate compounds, cyclic voltammetry of the active material at 20 mM concentration, and NMR analysis before and after cycling. This data is critical for understanding the performance and stability of the proposed energy storage materials.
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Electronic Supplementary Information (ESI) for Mixed Addenda Polyoxometalate “Solutions” for Stationary Energy Storage Harry D. Pratt III and Travis M. Anderson
Fig. S2 CV of 20 mM AP using a glassy carbon working electrode and a scan rate of 50 mV/s of the isolated tungsten electrochemistry region
Fig. S3 31P NMR of freshly prepared AP(top) and AP that has been cycled 20 times (bottom)
Fig. S4 Infrared spectra of AP and AP deposited on the GFD carbon-felt electrode