PDF Publication Title:
Text from PDF Page: 049
from good wetting of the carbon spheres. Therefore, CMC polymer is used as a dispersive and thickening agent, and a high rotation speed of mixing is applied. In the next step, a precise amount of NBR was added, and dispersion was subjected to additional mixing with Dispermat® (5 min). This time, however, the stirring was performed at lower rotation speed (500 rpm) in order not to break NBR polymeric chains. In further discussion, these electrodes, even if composed of mixtures of two polymers, are named as CMC-based electrodes, for simplicity. Such prepared homogenous ink was then coated using doctor-blade technique onto 20 μm thick Al foil. Freshly coated electrode was dried in an oven at 55°C during 24 h. Once dried, Ø 14 mm electrode disks (surface area of 1.539 cm2) were punched out, precisely weighed and exposed to additional drying at RT under vacuum (in BÜCHI®) during few hours in order to remove the eventual residuals of water and NMP. Dried electrodes were then entered inside the argon-filled glove box for further coin cells fabrication. A schematic graph (Figure 2-1) illustrates all the steps of electrode preparation. Figure 2-1. Schematic illustration of the electrode preparation procedure. The resulting electrode loading and thickness were mainly ruled by the ink viscosity and the thickness of the blade. The “thin” electrodes were aimed to be ~ 2.5 mg cm-2 (which is ~ 2 mgSulfur cm-2 ↔ theoretically ~ 3.35 mAh cm-2). Thicker electrodes were also prepared, with loadings up to 7 mgSulfur cm-2. A “standard” liquid electrolyte composition was chosen, based on former results obtained by Céline Barchasz45. The electrolyte was prepared in an argon-filled glove box by dissolving lithium bis(trifluoromethane sulfone)imide salt (LiTFSI, 99.95 %, Rhodia Asia Pacific), in a mixture of ether-based solvents: tetraethylene glycol dimethyl ether (TEGDME, 99 %, Aldrich) and 1,3-dioxolane (DIOX, anhydrous, 99.8 %, Aldrich) in 1/1 volume ratio. Lithium nitrate (LiNO3, Aldrich) was used as an additive commonly known from its beneficial effect against polysulfide shuttle177,182,215. The salt concentrations in the solvents were as follow: 1M LiTFSI and 0.1M LiNO3. The solvents were stored on molecular sieves for at least 72 h prior being used, while LiTFSI and LiNO3 salts were dried under vacuum during 48h at 120 °C and 80 °C, respectively. Chapter 2: S8 electrode on Aluminum 45PDF Image | Accumulateur Lithium Soufre
PDF Search Title:
Accumulateur Lithium SoufreOriginal File Name Searched:
WALUS_2015_archivage.pdfDIY PDF Search: Google It | Yahoo | Bing
Sulfur Deposition on Carbon Nanofibers using Supercritical CO2 Sulfur Deposition on Carbon Nanofibers using Supercritical CO2. Gamma sulfur also known as mother of pearl sulfur and nacreous sulfur... More Info
CO2 Organic Rankine Cycle Experimenter Platform The supercritical CO2 phase change system is both a heat pump and organic rankine cycle which can be used for those purposes and as a supercritical extractor for advanced subcritical and supercritical extraction technology. Uses include producing nanoparticles, precious metal CO2 extraction, lithium battery recycling, and other applications... More Info
CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com (Standard Web Page)