PDF Publication Title:
Text from PDF Page: 053
Variants of Zn-based RFBs are reported in the current literature. For instance, a zinc- vanadium RFB based on methanesulfonic acid solutions containing up to 3 mol dm–3 V(IV)/V(V) has been proposed [26]. The device provides a discharge cell potential of 1.7 V, yielding coulombic and voltage efficiencies of 96% and 67%, respectively, during short-term testing. An undivided Zn-PbO2 RFB with phase change on both electrodes in a sulfuric acid electrolyte has been also studied [102]. Electrolyte composition, zinc deposit morphology and additives were reported. The cell potential of this battery is relatively high, close to 2.4 V. At a discharge current density of 150 mA cm–2 the charge efficiency was ca. 87% [279]. The feasibility of an unusual Zn-Ag concentration cell using low-cost microporous separators has been studied preliminary [280]. This battery is driven by the different concentration of ZnCl2 in two solutions as a result of a distillation step. With Zn and Ag electrodes, a modest potential of up to ca. 1.04 V can be achieved. Another new RFB concept can be found in a Zn-Ag doped polyaniline (Pani) suspension RFB [58]. As shown in Figure 17, a single ZnCl2 electrolyte flows into the positive half-cell, where it partially diverts into the negative half- cell, from there the solution goes back to the reservoir. The microparticles cannot pass through the microporous separator, remaining in the positive side. In this way, an average cell potential of about 0.7 V can be obtained during a 150 mA cm–2 discharge. The degradation of the positive graphite electrode by the oxidation polyaniline and the low achieved cell potential are the main disadvantages of this system. Organic active species are being increasingly considered for RFBs and Zn systems are no exception. A Zn-polymer RFB has been demonstrated using 2,2,6,6-tetramethylpiperidinyl- N-oxyl (TEMPO) as the active redox species in the positive electrode [281-283]. The positive active species resides in the electrolyte in the form of poly(TEMPO methacrylate) micelles. 53PDF Image | hybrid redox flow batteries with zinc negative electrodes
PDF Search Title:
hybrid redox flow batteries with zinc negative electrodesOriginal File Name Searched:
Zn_Negative_RFB_Review_24_Jan_2018.pdfDIY PDF Search: Google It | Yahoo | Bing
Salgenx Redox Flow Battery Technology: Power up your energy storage game with Salgenx Salt Water Battery. With its advanced technology, the flow battery provides reliable, scalable, and sustainable energy storage for utility-scale projects. Upgrade to a Salgenx flow battery today and take control of your energy future.
CONTACT TEL: 608-238-6001 Email: greg@salgenx.com (Standard Web Page)