Lakshmi, D (2022) Amelioration of ionic conductivity (303 K) with the supplement of MnO2 fller in the chitosan biopolymer electrolyte for magnesium batteries. Polymer Bulletin.

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Abstract

In the present work, the signifcance of adding MnO2 fller towards the development of biopolymer electrolyte and chitosan with enhanced ionic conductivity has
been reported. The complexation that has been taken place with the inclusion of
MgNO3.6H2O salt and MnO2 fller in the chitosan matrix has been investigated
through the Fourier transform infrared (FTIR) spectra analysis. Further, the transport parameter values such as number of charge carrier densities (n), mobility (μ)
and difusion coefcient (D) have been calculated from the deconvoluted FTIR spectra. X-Ray difraction (XRD) and diferential scanning calorimetric (DSC) examination revealed that the inclusion of fller signifcantly reduced the degree of crystallinity and the glass transition Tg values, respectively. These fndings show that the
inclusion of fller increases the segmental mobility of the polymer chains, allowing for faster ion transport. The conduction properties of the prepared electrolytes
have been determined using alternating current (AC) impedance analysis, with the
electrolyte containing 60 wt% magnesium salt (2.6±0.08)× 10−4 S cm−1 achieving
the maximum ionic conductivity value at room temperature (303 K). This value is
further increased by one order of magnitude with the addition of MnO2 fller into
the polymer matrix (1.25±0.09)× 10−3 S cm−1. To elucidate the individual contributions of ions and electrons in the conduction process, the direct current (DC)
polarization method has been used to determine the transference number (tion) of
the produced electrolytes. The fller-added chitosan polymer exhibits an extended
electrochemical stability window, 1.7 V, as determined by linear sweep voltammetry
(LSV).

Item Type: Article
Uncontrolled Keywords: Biopolymer · Magnesium · Battery · Filler · Conductivity · Transference number
Divisions: PSG College of Arts and Science > Department of Physics
Depositing User: Mr Team Mosys
Date Deposited: 15 Mar 2023 06:37
Last Modified: 15 Mar 2023 06:37
URI: http://ir.psgcas.ac.in/id/eprint/1775

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