PDF Publication Title:
Text from PDF Page: 122
8 Half – cell performance of Carbon Felt Samples Findings from literature Chen et al. [222] measured a polarization curve for the discharging of a fully charged cell (SOC =100%) with fluorinated sulfonated poly(arylene ether) SFPAE membranes of three different thicknesses (28, 45 and 80 m). The cell was fully charged using a 100 mL solution of 1.4 M VOSO4 dissolved in 2 M H2SO4 as the positive electrolyte and 50 mL of the same solution as the negative electrolyte. The polarization curve for the cell was measured in 10 mA cm-2 current density increments, from 10 mA cm-2 through to 700 mA cm-2, with the potential for each step reported as the average potential over 30 s. The peak power densities recorded for the cells with 28 m, 45 m and 80 m membranes were 267 mW cm−2, 311 mW cm−2 and 253 mW cm−2, respectively. The 45 m membrane therefore provides the best compromise between voltage efficiency and vanadium crossover of the three membranes tested. Liu et al. [223] investigated the effect of electrode surface area on the polarization curve using different layers of 0.4 mm thick SGL 10AA carbon paper electrodes, with a geometric area of 5 cm2. In this configuration, the optimal number of carbon paper layers was found to be three, recording a peak power density of 557 mW cm-2. The electrolyte flow rate has a significant influence on mass transport limitations, but experimental flow rates are not always stated. Aaron et al. [224] carried out polarization curve measurements at different electrolyte flow rates to estimate the mass transport limitation for the discharging step. At 0.5 mL min-1 this was found to be 40 mA cm-2, increasing to 321 mA cm-2 at25mLminfora1MVO2+ in5MH2SO4 positiveelectrolyteand1MV2+ in5M H2SO4 negative electrolyte. The cell used a 0.2 mm thick Toray carbon paper electrode with a geometric area of 5 cm2. 110PDF Image | Electron Transfer Kinetics in Redox Flow Batteries
PDF Search Title:
Electron Transfer Kinetics in Redox Flow BatteriesOriginal File Name Searched:
electron-transfer-flow-batteries-thesis.pdfDIY PDF Search: Google It | Yahoo | Bing
Salgenx Redox Flow Battery Technology: Salt water flow battery technology with low cost and great energy density that can be used for power storage and thermal storage. Let us de-risk your production using our license. Our aqueous flow battery is less cost than Tesla Megapack and available faster. Redox flow battery. No membrane needed like with Vanadium, or Bromine. Salgenx flow battery
CONTACT TEL: 608-238-6001 Email: greg@salgenx.com (Standard Web Page)