Development of biopolymer electrolyte membrane using Gellan gum biopolymer incorporated with NH4SCN for electro-chemical application

Lithium-ion batteries (LIBs) are favorable power source devices at the last two decades, owing to high energy density, rechargeable, long life cycle, portable, safe, rechargeable, good performance and friendly environment. To support their development, in this research has been successfully prepared polymer electrolyte membrane, a main component of LIBs, based on 1-ethyl-3-methylimidazolium acetate ([EMIm]Ac) ionic liquid-plasticized methyl cellulose/lithium perchlorate (MC/LiClO4). [EMIm]Ac ionic liquid was easy synthesized by metathesis reaction between 1-ethyl-3-methylimidazolium bromide ([EMIm]Br) ionic liquid and potassium acetate (CH3COOK) at ambient temperature, for 1 hour. [EMIm]Ac ionic liquid was functional groups analyzed with Fourier Transform Infra-red (FT-IR) and structural analyzed with 1H-Nuclear Magnetic Resonance (NMR) and 13C-NMR. [EMIm]Ac ionic liquid-plasticized MC/LiClO4 biopolymer electrolyte membrane was prepared by casting solution, with [EMIm]Ac ionic liquid content, 0, 5, 10, 15, 20, 25, and 30% (w/w). Effect of 15% (w/w) [EMIm]Ac ionic liquid incorporation to MC/LiClO4 showed the best condition and selected as the optimum condition with conductivity, tensile strength, elongation break, and thermal stability of 9.160×10-3 S.cm-1, 24.19 MPa, 36.43%, ~256 and ~370 ºC, respectively. These results confirm that [EMIm]Ac ionic liquid can plasticize biopolymer electrolyte membranes of MC/LiClO4 to be appealing performances to fulfill the LIB’s separator requirement. Copyright © 2019 BCREC Group. All rights reserved

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Resorcinol-Formaldehyde (RF) as a Novel Plasticizer for Starch-Based Solid Biopolymer Electrolyte

Polymers ◽

10.3390/polym12092170 ◽

2020 ◽

Vol 12 (9) ◽

pp. 2170

Author(s):

Vidhya Selvanathan ◽

Mohd Hafidz Ruslan ◽

Mohammod Aminuzzaman ◽

Ghulam Muhammad ◽

N. Amin ◽

...

Keyword(s):

Polymer Electrolyte Membrane ◽

Amorphous Region ◽

Lithium Triflate ◽

Temperature Conductivity ◽

Room Temperature Conductivity ◽

Resorcinol Formaldehyde ◽

Casting Technique ◽

Electrolyte Membrane ◽

Solution Casting Technique ◽

Biopolymer Electrolyte

A starch-resorcinol-formaldehyde (RF)-lithium triflate (LiTf) based biodegradable polymer electrolyte membrane was synthesized via the solution casting technique. The formation of RF crosslinks in the starch matrix was found to repress the starch’s crystallinity as indicated by the XRD data. Incorporation of the RF plasticizer improved the conductivity greatly, with the highest room-temperature conductivity recorded being 4.29 × 10−4 S cm−1 achieved by the starch:LiTf:RF (20 wt.%:20 wt.%:60 wt.%) composition. The enhancement in ionic conductivity was an implication of the increase in the polymeric amorphous region concurrent with the suppression of the starch’s crystallinity. Chemical complexation between the plasticizer, starch, and lithium salt components in the electrolyte was confirmed by FTIR spectra.

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Biopolymer Electrolyte Based on Gellan Gum With Magnesium Chloride for Magnesium Battery

10.21203/rs.3.rs-206525/v1 ◽

2021 ◽

Author(s):

Buvaneshwari P ◽

Mathavan T ◽

Selvasekarapandian S ◽

M Vengadesh Krishna ◽

R Meera Naachiyar ◽

...

Keyword(s):

Polymer Electrolyte ◽

Magnesium Chloride ◽

Impedance Analysis ◽

Ac Impedance ◽

Open Circuit ◽

Gellan Gum ◽

Chloride Salt ◽

Ac Impedance Analysis ◽

Biopolymer Electrolyte ◽

Ion Conducting

Abstract Eco-Friendly, non-toxic and biodegradable natural biopolymer electrolyte, Gellan Gum with Magnesium Chloride has been prepared by solution casting technique. The prepared biopolymer electrolyte has been characterized by XRD, FTIR, DSC and AC impedance analysis techniques. XRD study is used to analyze amorphous nature/crystalline nature of the polymer electrolyte. Complex formation between Gellan Gum and magnesium chloride salt has been studied by FTIR technique. The glass transition temperature (Tg) of the polymer electrolytes are obtained by DSC measurement. The highest ionic conductivity 2.91×10− 2 Scm− 1 has been obtained for electrolyte of 1.0 g Gellan Gum with 0.5 M.wt% MgCl2 from AC impedance analysis at room temperature. Transference number 0.97 has been obtained by Wagner’s polarization method for high conducting sample. The Mg2+ cationic transport number 0.35 has been found by Evan’s method for high conducting sample. Magnesium ion conducting battery has been constructed using the high conducting polymer electrolyte. Its open circuit voltage 2.39 V and the battery discharge characteristics are studied.

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Refining Energy Reduction and Pulp Characteristic Modification of Alkaline Peroxide Mechanical Pulp (APMP) Through Enzyme Application

TAPPI Journal ◽

10.32964/tj8.5.19 ◽

2009 ◽

Vol 8 (5) ◽

pp. 19-25 ◽

Cited By ~ 2

Author(s):

PETER W. HART ◽

DARRELL M. WAITE ◽

LUC THIBAULT, ◽

JOHN TOMASHEK ◽

MARIE-EVE ROUSSEAU ◽

...

Keyword(s):

Wood Chip ◽

The United States ◽

Enzyme Treatment ◽

Chemical Application ◽

Alkaline Peroxide ◽

Eucalyptus Wood ◽

Pulp Properties ◽

Pulp Processing ◽

Two Stages ◽

Enzyme Application

Eucalyptus wood chips were subjected to impregnation with various blends of novel fiber modify-ing enzymes before chemical pretreatment and two stages of refining using the preconditioning refiner chemical–alkaline peroxide mechanical pulping (PRC-APMP) process. Wood chip impregnation and pulp processing was con-ducted at a pilot plant in the United States. When compared under constant chemical application and at a constant 350 mL CSF, enzyme treatment reduced specific refining energy by at least 24%. The effect of one versus two stages of impregnation and of enzyme action upon several physical pulp properties was determined.

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