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a) 100 80 60 40 20 current density / mA cm-2: 2.5 5 10 15 20 25 b) Cycle current density / mA cm-2: 00 5 10 15 20 25 30 100 2.5 80 60 40 20 5 10 15 20 25 100 90 80 70 60 CE VE EE 00 5 10 15 20 25 3050 Cycle Figure 7.45. – a) Capacity retention obtained among cycling, while increasing the current density (2.5 to 25 mA/cm2) for a single cell containing an electrolyte of 0.05 M 1,2- BQDS(+) and 2,7-AQDS in 3 M MeSO3H solution. b) Coulombic, voltage and energy efficiency obtained among cycling, while increasing the current density (2.5 to 25 mA/cm2) for a single cell containing an electrolyte of 0.05 M 1,2-BQDS(+) and 2,7-AQDS in 3 M MeSO3H solution. Additionally, the coulombic efficiency (CE) for the charge-discharge cycles is also deeply analyzed. Related to this, as seen in Figure 7.45b, the values increase from 95% CE at a low current of 2.5 mA/cm2 up to 99% in case the current is raised ten times (25 mA/cm2). This effect is due to the presence of a lower contribution of side reactions, as well as lower active species cross-over trough the membrane. However, it is the voltage efficiency (VE) the limiting factor to the overall efficiency (energy efficiency - EE). In this regard, as seen previously in Figure 7.44, the polarization effect while the current is raised follows the same tendency as the voltage efficiency. Obtaining extraordinary values of 76% VE for 10 mA/cm2 of 201 Efficiency / % Efficiency / % Capacity retention / %PDF Image | Redox Flow Batteries Vanadium to Earth Quinones
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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
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