Eco-Friendly Red Seaweed-Derived Electrolytes for Electrochemical Devices
authors Nunes, SC; Pereira, RFP; Sousa, N; Silva, MM; Almeida, P; Figueiredo, FML; Bermudez, VD
nationality International
journal ADVANCED SUSTAINABLE SYSTEMS
author keywords [Bmim]Cl; ionic conductivity; kappa-carrageenan; polymer electrolytes; room temperature fuel cells
keywords PROTIC IONIC LIQUIDS; HIGH-PERFORMANCE SUPERCAPACITORS; AB-INITIO CALCULATIONS; POLYMER ELECTROLYTE; KAPPA-CARRAGEENAN; ELECTROCHROMIC DEVICES; PROTONIC CONDUCTIVITY; COMPOSITE MEMBRANES; NMR-SPECTROSCOPY; ENERGY-STORAGE
abstract Green electrolytes composed of kappa-carrageenan (kappa-Cg), 1-butyl-3-methyl- 1H-imidazolium chloride ([Bmim]Cl) ionic liquid, and glycerol (Gly) are prepared in aqueous solution using a simple, clean, fast and low-cost procedure. A flexible membrane incorporating 50% wt [Bmim] Cl and 50% wt Gly with respect to kappa-Cg exhibits the highest ionic conductivity values (8.47 x 10(-4)/2.45 x 10(-3) S cm(-1) at 20/66 degrees C, under anhydrous conditions, and 5.49 x 10(-2)/0.186 S cm(-1) at 30/60 degrees C, at a relative humidity of 98%). Tests of room temperature air/hydrogen fuel cells incorporating kappa-Cg, kappa-Cg/Gly, and kappa-Cg/ Gly/[Bmim] Cl membranes demonstrate that these predominantly protonic conductors electrolytes are particularly well suited for the design and fabrication of eco-friendly electrochemical devices whose operation does not require the flow of gases and does not lead to water formation. These new materials have excellent application prospects in high performance (flexible) energy storage devices (supercapacitors and batteries) and electrochromic devices.
publisher WILEY-V C H VERLAG GMBH
issn 2366-7486
year published 2017
volume 1
issue 9
digital object identifier (doi) 10.1002/adsu.201700070
web of science category GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY
subject category Science & Technology - Other Topics
unique article identifier WOS:000424595000007

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