PDF Publication Title:
Text from PDF Page: 015
vol% LiCoO2 and 10 vol% Li4Ti5O12 [60]. This concept allows for very high concentrations of redox species (estimated ranges from 20 to 80 mol L-1) [61]. Conductive slurries are used as electrolyte, in which carbon forms a conductive network. The limited conductivity of these slurries (0.1 mS cm-1) is one of the contemporary challenges of semisolid flow batteries [60,61]. A concept does not rely on dissolved redox species, but instead on a solid active material that is stored in tanks: Mediated flow batteries. In these, the charge is transferred to the active material via redox-mediators such as ferrocene [62] or cobaltocene [63]. This type of flow battery utilises similar active materials as the semisolid flow batteries, but avoids the high viscosity and poor conductivity of slurries. To avoid losses, the potentials of the redox mediators must closely match the (de-)intercalation potentials of the active material. Another concept is the addition of a solid energy booster to the tank of a RFB [64]. This approach proposes that the redox transitions of the polymer polyaniline are accessed by a redox mediator, storing charge in the emeraldine-pernigraniline and leucoemeraldine- emeraldine redox transitions of the polymer. As redox-mediator Fe2+/Fe3+ and V3+/VO2+ were employed at a concentration of 1 M. When polyaniline was combined with conductive carbon and abovementioned electrolytes the volumetric energy density was increased by a factor of three, compared to the base case with only iron- and vanadium-ions [64]. Current the V3+/VO2+ couple. Type Advantages Solid - liquid (e.g. Zn/Br) Mediated FB (Ferrocene as shuttle and LiFePO4 as storage material) Liquid-liquid (e.g. Fe/Cr) High energy density due to solid state. Low viscosity of shuttles Good conductivity Capacity that is only limited by the size of the tank. Chal Internal short-circui High self-discharge. Limited variety of s Complicated reactio Lower concentratio in the solid state. High energy density due to high concentration of redox species. Limited conductivit High viscosities; Potentially sluggish species. Slurries (e.g. LiCoO2 / Li4Ti5O12 Page 15 of 63 t y k u nPDF Image | Redox Flow Batteries Concepts Chemistries
PDF Search Title:
Redox Flow Batteries Concepts ChemistriesOriginal File Name Searched:
5870EAF5-2D70-44C8-A0A7-62D3A1462269.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)