Dataset for the Paper: A Parts-per-Million Scale Electrolyte Additive for Durable Aqueous Zinc Batteries

Experimental data in Source data file were obtained as follows: Fourier-transform infrared (FTIR) measurement was carried out using a Perkin Elmer FT-IR spectrophotometer. Powder X-ray diffraction (XRD) patterns were conducted by a Rigaku Smartlab X-ray diffractometer with Cu Kα radiation (λ = 1.5406 Å). X-ray photoelectron spectroscopy (XPS) was performed on a PHI model 5802; the carbon spectrum (284.8 eV) was used as a reference for calibration. FEI Quanta 250 scanning electron microscope (SEM) and energy dispersive spectroscopy (EDS) were used to study the morphology and elemental composition of the samples. Cyclic voltammograms (CVs) and electrochemical impedance spectroscopy (EIS) were collected on an electrochemical workstation (CHI 660E). EIS measurements were performed after assembling the batteries without additional treatment. The applied signal for EIS measurement was potentiostatic (single frequency) with an amplitude of 0.005 with a frequency range extended from 0.01 to 100,000 Hz until reaching a total of 74 data points for Zn|Zn0.25V2O5 full cells and 61 data points for Zn|Zn symmetric cells. The long-term stability and rate performance of batteries were obtained by the LAND battery testing system at around 25oC. The LSV curves were obtained by sweeping from -1.25 V to 0 V with a scan rate of 5 mV/s and the CA measurement was conducted with an initial bias of -1.2 V. All electrochemical measurements were conducted in an ambient atmosphere without the use of chambers. The NMR measurement was conducted using the Bruker 300MHz "AVANCE III HD" Nuclear Magnetic Resonance System (NMR-300), which was equipped with an auto-sampler."MD - 1st frame" and "MD - last frame" is the initial and final configurations derived from the molecular dynamics trajectories, respectively."Atom list of PPGA" is the atomic coordinates of the optimized PPGA molecule.