DOI: 10.17630/18007bfa-ba92-4cd2-86af-ce504e640f91
title: Polyetherureas as aqueous binders for Li ion Batteries (dataset)

description: The raw data folder contains information related to the synthesis and characterization of polyetherureas and their applications as binders in batteries, with details as follows.

The folder named NMR contains fid files, mestrenova files, and pdf images for 1H and 13C NMR spectra of the synthesized polyetherureas. NMR spectra were recorded on a Bruker AVIII-HD 500 MHz NMR spectrometer at 298 K unless otherwise specified. Residual proton solvent was used as a reference for 1H spectra in deuterated solvent samples. All chemical shifts (δ) are quoted in ppm and coupling constants (J) in Hz.

The folder named TGA contains thermogravimetric studies (text files) of the synthesized polyetherureas. TGA was performed using a Stanton Redcroft STA-780 Series Thermal Analyser between 20–700°C at a heating rate of 10 °C/min under a flow of nitrogen gas (25 mL/min).

The folder named PXRD contains origin and ppt files showing the powder XRD of the synthesized polyetherureas.

The folder named SEM contains TIFF images of the polymeric binders before and after cycling. A JEOL JSM-IT800 scanning electron microscope (SEM) was used to record the microstructures and EDS elemental analysis of the pristine electrodes and electrodes after running for 10 cycles.

The folder named IR contains text, origin and pdf files showing the IR spectra of the isolated polyureas and binders before and after cycling. Infrared spectra (ATR-FTIR) were collected using a Shimadzu IRAffinity-1.

The mechanical properties folder contains images showing stress-strain study and peel test.

DSC folder contains pdfs showing differentical calorimetry studies. DSC analyses were performed using a Netzsch DSC204 between –80–300°C at a heating rate of 10 °C/min under a flow of nitrogen gas (20 mL/min) after an initial heat/cool cycle (25–120 °C at 10 °C/min with a 20-minute isothermal at 120 °C) to remove the thermal history of the sample.

GPC folder contains excel files showing molecular weight estimation of the isolated polyetherureas. Gel permeation chromatography (GPC) was performed on an Agilent 1260 InfinityLab II GPC fitted with a refractive index (RI) detector (35 °C). The single (plus guard column) Agilent PolarGel column setup was contained within an oven (35 °C). H2O was used as the eluent at a flow rate of 1.0 mL min−1. Samples were dissolved in the eluent (2.0 mg mL−1), filtered (0.2 μm pore size) and run immediately. The calibration was conducted using a series of monodisperse poly(ethylene glycol) (Mn = 194–20,000 g mol–1) and poly(ethylene oxide) (Mn = 30,000–50,000 g mol–1) standards obtained from Agilent Technologies.

Cell data folder contains galvanostatic studies. Galvanostatic cycling were performed on a Biologic BCS-805 cycler and Neware BTS4000-5V10mA battery testing system, both at 30°C. CV was conducted in a cell at 0.1 mV s−1 for 5 cycles from 4.2 to 2.5 V. The galvanostatic charge and discharge were performed with a
potential range between 2.5 V and 4.2 V. The cycling performance was measured at different current densities of 10, 25 and 100 mA/g for 50-200 cycles. The rate capabilities of the half-cells were tested at 25, 50, 75, 100, 250 and 500 mA/g. The coin cells were prepared using LFP:Carbon:Binder in the ratio of 80:10:10 as cathode with a Al foil as the current collector, Li-metal ( 1 cm2 area, thickness 0.1 cm) as the counter electrode, 1M LiPF6 in ethylene carbonate: dimethyl carbonate (1:1) as electrolyte. The theoretical capacity of 170 mAhg-1 is used for LFP to calculate C-rates for electrochemical testing.