Development and characterization of eco-friendly biopolymer gellan gum based electrolyte for electrochemical application

Author:

Periyajeyam Buvaneshwari12,Thangapandian Mathavan1,Subramanian Selvasekarapandian23,Manoharan Vengadesh Krishna2,Ramadhasan Meera Naachiyar2,Ramasamy Mangalam4

Affiliation:

1. Department of Physics , N.M.S.S.Vellaichamy Nadar College , Madurai , Tamil Nadu 625019 , India

2. Materials Research Center , Coimbatore , Tamil Nadu 641045 , India

3. Department of Physics , Bharathiar University , Coimbatore , Tamil Nadu , India

4. Functional Materials Laboratory , Department of Physics , PSG Institute of Technology and Applied Research , Coimbatore , Tamil Nadu , India

Abstract

Abstract Magnesium ion conducting eco-friendly biopolymer electrolyte based on gellan gum has been developed by solution casting technique and characterized by XRD, FTIR, DSC, AC impedance analysis and LSV. Amorphous nature of the polymer electrolyte has been confirmed by XRD analysis. FTIR analysis confirms the complex formation between gellan gum and magnesium nitrate salt. Glass transition temperature of the polymer electrolytes have been found in DSC analysis. Ionic conductivity of polymer electrolyte membrane has been analysized by AC impedance studies, polymer electrolyte 1.0 g gellan gum with 0.7 wt% Mg (NO3)2 has highest ionic conductivity 1.392 × 10−2 S/cm at room temperature. Evan’s polarization method attributes Mg+ cationic transference number as 0.342 for high conducting polymer electrolyte. The high conducting polymer membrane has electrochemical stability 3.58 V. Using this high conducting polymer electrolyte, magnesium ion battery is constructed and the battery performance was studied. The open circuit voltage is found as 1.99 V.

Publisher

Walter de Gruyter GmbH

Subject

Materials Chemistry,Polymers and Plastics,General Chemical Engineering

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