PDF Publication Title:
Text from PDF Page: 073
5 Single fibre electrode measurements - a versatile strategy for assessing the non-uniform kinetics In the present work, the cyclic voltammograms recorded at these single carbon fibre electrodes can then be modelled assuming that the mass transport is controlled by semi-infinite cylindrical diffusion in 1D, allowing electron transfer rate constants to be obtained for each fibre. Figure 5.2 demonstrates that a good fit can be obtained between experimental and simulated voltammograms under these conditions. Figure 5.2: Comparison of a typical experimental cyclic voltammogram obtained at a single carbon fibre electrode with a simulated cyclic voltammogram calculated to achieve the best fit. Cyclic voltammetry recorded at 200 mVs-1 in a solution of 10 mM ferricyanide and 10 mM ferrocyanide. For the example in Figure 5.2, the rate constant determined for the single carbon fibre (𝑘0 = 0.0111 cm s-1) compares well with the rate constant measured at a polished GC electrode (𝑘0 = 0.0096 cm s-1) in the same solution, and is similar to that measured on other carbon electrodes [154] and identical fibres measured by EIS [188]. This value is also very similar to that reported by Neudeck and Dittrich [181] at carbon micro-cylindrical electrodes (k0 = 0.00998 cm s-1). Importantly, by repeating these measurements on 12 single fibre electrodes, multiple rate constants were found (average 𝑘0 = 0.0075 ± 0.0030 cm s-1) which is likely due to the heterogeneous nature of carbon felt [159, 160] (Table 5.1). 61PDF 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 | RSS | AMP |