Biopolymer agar‐agar doped with NH₄SCN as solid polymer electrolyte for electrochemical cell application

Abstract

A new polymer electrolyte based on the biopolymer Agar-Agar doped with ammonium thiocyanate (NH 4 SCN) has been prepared and characterized by FTIR analysis, X-ray diffraction measurements, AC impedance spectroscopy, transference number measurements, and DSC analysis. The Fourier transform infrared analysis confirms the complex formation between agar and NH 4 SCN. The amorphous nature of the polymer electrolyte has been revealed from X-ray diffraction analysis. The highest ionic conductivity has been observed for the sample of composition 1:1 between Agar and NH 4 SCN. As a function of temperature, the ionic conductivity of this sample exhibits Arrhenius behavior increasing from 1.03 3 10 23 S cm 21 at ambient temperature to 3.16 3 10 23 S cm 21 at 343 K. The transference number has been estimated by the dc polarization method, and it has been proven that the conducting species are predominantly cations. Using the highest conductivity polymer electrolyte, solid state electrochemical cell has been fabricated and cell parameters are reported.

Structural, Electrical and Electrochemical Properties of Glycerolized Biopolymers Based on Chitosan (CS): Methylcellulose (MC) for Energy Storage Application

“…In conjunction with preventing environmental pollution which could be due to the usage of lithium-based salts, many studies proved that ammonium-based salts such as NH 4 SCN [ 6 , 24 ], NH 4 NO 3 [ 25 , 26 ], NH 4 Br [ 27 , 28 ], and NH 4 F [ 29 ], have promising polymer electrolyte characteristics with a comparable dissociation of ions [ 30 ]. Besides, the presence of NH 4 + and H + in the ammonium-based electrolyte could achieve a high ionic conductivity [ 31 ].…”

Characterization of agar from Gracilaria tikvahiae cultivated for nutrient bioextraction in open water farms

“…The broad absorption region between 1100 and 1000 cm −1 as well as the band at 1150 cm −1 are common to all polysaccharides and could be assigned CeOeH bending and to CeO and CeC stretching (Warren, Perston, Royall, Butterworth, & Ellis, 2013). The characteristic peak at 1640 cm −1 is assigned to C] O stretching (Selvalakshmi, Vijaya, Selvasekarapandian, & Premalatha, 2017). The band at 890 cm −1 is also typical of agar samples and could be related with the CeH bending at the anomeric carbon in G residues.…”

Characterizations of Pectin/Lithium Sulfate Solid Biopolymer Electrolytes

“…Researchers have focused on the development of new materials for several applications with eco-friendly. The potential applications of biomaterials are numerous and involve different fields such as electrochemical devices, electro chromic devices, bio medical and so on [1][2][3][4]. The chemical polymers such as PVA, PVP, PEO, PMMA, PVC, and Pvdf are used to prepare the electrolytes for potential application in electrochemical devices [5][6][7][8].…”

“…Biodegradable natural polymers are used to prepare polymer electrolyte films for several applications. In the earlier reports reveals that the biopolymer based solid polymer electrolytes such as Pectin [9], Sodium alginate [10], agar-agar [2], cellulose acetate [11] and chitosan [12] are reported. The green polymer Pectin is used in this work which is a polysaccharide natural polymer, great abundance, acts as a cementing material in the cell walls of all plant tissues and so on [13].…”