The Study of Plasticized Solid Polymer Blend Electrolytes Based on Natural Polymers and Their Application for Energy Storage EDLC Devices.

Yuhanees M. Yusof,Mohamad A. Brza,Muhamad H. Hamsan,Haw J. Woo,Mohd F. Z. Kadir,Ahmad S.F.M. Asnawi,Shujahadeen B. Aziz,Muaffaq M. Nofal,Shakhawan Al-Zangana,Elham M.A. Dannoun

doi:10.3390/polym12112531

Abstract

In this work, plasticized magnesium ion-conducting polymer blend electrolytes based on chitosan:methylcellulose (CS:MC) were prepared using a solution cast technique. Magnesium acetate [Mg(CH3COO)2] was used as a source of the ions. Nickel metal-complex [Ni(II)-complex)] was employed to expand the amorphous phase. For the ions dissociation enhancement, glycerol plasticizer was also engaged. Incorporating 42 wt% of the glycerol into the electrolyte system has been shown to improve the conductivity to 1.02 × 10−4 S cm−1. X-ray diffraction (XRD) analysis showed that the electrolyte with the highest conductivity has a minimum crystallinity degree. The ionic transference number was estimated to be more than the electronic transference number. It is concluded that in CS:MC:Mg(CH3COO)2:Ni(II)-complex:glycerol, ions are the primary charge carriers. Results from linear sweep voltammetry (LSV) showed electrochemical stability to be 2.48 V. An electric double-layer capacitor (EDLC) based on activated carbon electrode and a prepared solid polymer electrolyte was constructed. The EDLC cell was then analyzed by cyclic voltammetry (CV) and galvanostatic charge–discharge methods. The CV test disclosed rectangular shapes with slight distortion, and there was no appearance of any redox currents on both anodic and cathodic parts, signifying a typical behavior of EDLC. The EDLC cell indicated a good cyclability of about (95%) for throughout of 200 cycles with a specific capacitance of 47.4 F/g.

Highlights

The new characteristics of nano-sized metal particles (Fe, Ce, Cu, Zn and Ni) are nowadays studied because of their large surface areas and electronic structure
The interesting point is that a broad peak at a diffraction angle 2θ of 8.03◦ is recognized to relate to the presence of tri-methyl glucose repeating unit within the
2:Ni(II)-complex:glycerol electrolytes were synthesized via a CS:MC:Mg(CH

Summary

Introduction

The new characteristics of nano-sized metal particles (Fe, Ce, Cu, Zn and Ni) are nowadays studied because of their large surface areas and electronic structure. Metal complexes have emerged as an area of great current interest motivated by possible energy technology applications, electronics, optics, chemical catalysis and magnetics [1,2,3]. Their properties may be adjusted via control of the metal particle size, shape and organization. Brza et al [5] documented that a Cu(II)-complex in polyvinyl alcohol (PVA) greatly enhanced the amorphous phase. This condition is advantageous to electrolyte application because ions are transported in the amorphous region, improving the ionic conductivity [3]

Methods

Results

Conclusion