PDF Publication Title:
Text from PDF Page: 020
Figure 10. Membrane-free RFB Designs (A) Schematic of the hydrogen bromine laminar RFB. Reprinted with permission from Braff et al.94 Copyright 2013 Springer Nature. (B) The structure and working principle of the Fc-based membrane-free RFB that maintains high energy and power density. Reprinted with permission from Ding et al.96 Copyright 2015 American Chemical Society. (C) The experimental demo of the Fc-based cell shows a power output high enough to light a 9 3 9 LED array. Reprinted with permission from Ding et al.96 Copyright 2015 American Chemical Society. (D) Design principle of the membrane-free battery based on zinc2+ and Fc in immiscible solvents with chloride as charge carriers. Reprinted with permission from Gong et al.98 Copyright 2017 Electrochemical Society. (E) A horizontal design of the membrane-free RFB with the formation of two immiscible phases. Reprinted with permission from Navalpotro et al.99 Copyright 2017 Wiley-VCH Verlag GmbH & Co. KGaA. (F) Schematic representation of the membrane-free battery concept based on immiscible electrolytes in which a hydroquinone aqueous solution acts as the catholyte on top and a BQ in a hydrophobic ionic liquid solution acts as the anolyte at the bottom. Reprinted with permission from Navalpotro et al.99 Copyright 2017 Wiley-VCH Verlag GmbH & Co. KGaA. a similar membrane-free hydrogen bromine laminar RFB (Figure 10A) afterwards.94 In virtue of the highly concentrated electroactive materials with fast kinetics, such a RFB achieved a power density up to 0.795 W cm2 with voltage efficiency of 92%. The authors concluded that optimization on the cell architecture, including the cata- lyst composition, media porosity, channel size, and electrode distance, can further enhance the battery performance. An alternative strategy to building a membrane-free RFB is exploiting positive and negative species in two immiscible phases. Cui and coworkers passivated the Li- metal anode in an ether-based electrolyte with LiNO3 additive, and the lithium poly- sulfide solution can be directly adopted as the catholyte with greatly eliminated self- discharge effect.95 An energy density of 108 Wh L1 was demonstrated with a 5 M polysulfide catholyte. Moreover, Yu and coworkers reported a high-power-density Fc-based membrane-free RFB by taking advantage of the superior diffusion and re- action kinetics of the Fc/Fc+ redox couple (Figure 10B).96 It is well evidenced that the shuttle effect has been largely suppressed because of the sluggish reaction between ferrocenium and passivated Li metal. Power and energy density exceeding 1,400 and 40 Wh L1, respectively, can be delivered, and the experimental demo shows a power output high enough to light a 9 3 9 light-emitting diode (LED) array (Fig- ure 10C). In addition to Li anode, Zn was also employed to build the membrane- free RFB, giving the immiscibility between metals and electrolytes. Steingart and Chem 5, 1964–1987, August 8, 2019 1983PDF Image | Development of Redox Flow Batteries Based on New Chemistries
PDF Search Title:
Development of Redox Flow Batteries Based on New ChemistriesOriginal File Name Searched:
PIIS2451929419302207.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)