Manjuladevi, R (2020) Plasticized solid polymer electrolyte based on triblock copolymer poly(vinylidene chloride‑co‑acrylonitrile‑co‑methyl methacrylate) for magnesium ion batteries. Polymer Bulletin, 78. pp. 35-57.

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Abstract

Limited global resources of lithium lead to the consideration of magnesium ion batteries as potential energy storage devices. Magnesium ion batteries have potential
for high energy density but require new types of electrode and electrolytes for practical applications. Solid polymer electrolytes ofer the opportunity for increased safety
and broader electrochemical stability relative to traditional electrolytes. Herein, we
report the development of solid polymer electrolyte for magnesium ion batteries
based on triblock copolymer poly(vinylidene chloride-co-acrylonitrile-co-methyl
methacrylate) (poly(VdCl-co-AN-co-MMA)). The polymer electrolytes are prepared by solution-casting technique using poly(VdCl-co-AN-co-MMA) with various concentrations (10 wt%, 20 wt%, 30 wt%, and 40 wt%) of magnesium chloride
(MgCl2) salt. Among the prepared polymer electrolytes, the highest magnesiumion-conducting polymer electrolyte is 70 wt% poly(VdCl-co-AN-co-MMA):30 wt%
MgCl2 polymer–salt composition by electrochemical impedance measurements, and
the obtained value of ionic conductivity is found to be in the order of 10−5 S cm−1.
Addition of plasticizer succinonitrile in various concentrations (0.1 wt%, 0.2 wt%,
0.3 wt% and 0.4 wt%) with the identifed polymer electrolyte of highest conductivity shows increased values of conductivity up to the order of 10−3 S cm−1. Observable changes in crystalline/amorphous nature of the polymer are analyzed using
X-ray difraction pattern. Glass transition temperature of polymer electrolytes has
been found using diferential scanning calorimetric studies. Transference number
measurements have been made to confrm the ionic conductivity. The electrochemical stability for highest conducting plasticized polymer electrolyte is obtained from
linear sweep voltammetry as 3.3 V. A primary magnesium ion battery has been constructed with prepared electrolyte of highest conductivity, and its performance and
discharge characteristics are also analyzed. The open-circuit voltage of 2.18 V is
obtained with the constructed primary magnesium ion battery.

Item Type: Article
Uncontrolled Keywords: Polymer electrolyte · Magnesium battery · Triblock copolymer · Electrochemical device · Magnesium chloride · Succinonitrile
Divisions: PSG College of Arts and Science > Department of Physics
Depositing User: Mr Team Mosys
Date Deposited: 16 Aug 2022 04:32
Last Modified: 16 Aug 2022 04:32
URI: http://ir.psgcas.ac.in/id/eprint/1459

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