Free Volume Controlled Ionic Conductivity in Poly Vinyl Alcohol/Zinc Acetate Solid Polymer Electrolytes

Abstract

Poly vinyl alcohol (PVA)/Zinc acetate (ZnAc) Solid Polymer Electrolytes (SPEs) of different ZnAc weight percentage (5%, 10%, 15%, 20%) were prepared. Positron Lifetime Spectroscopy (PLS) studies reveal the increased fractional free volume (Fv) from 1.93% to 2.16% for 20 wt% of ZnAc loading. The increased ionic conductivity of PVA/ZnAc SPEs for 20 wt% of ZnAc loading suggests the increased concentration of Zn2+ cations and acetate anions. The ionic conductivity of PVA/ZnAc SPEs increases at higher frequencies of the applied electric field due to the increased polarization of dipoles. The increased ionic conductivity of PVA/ZnAc SPEs with increased fractional free volume suggests that the mobility of Zn2+ and acetate ions is favored by the amorphous phase of the SPEs. The XRD results justify the increased amorphousness of PVA/ZnAc SPEs. FTIR studies confirm the formation of polymer salt complexes due to chemical bonding between C–H group of PVA and carbonyl group of (C=O) of ZnAc salt.

A Self‐Healing Flexible Quasi‐Solid Zinc‐Ion Battery Using All‐In‐One Electrodes

“…[ 21 ] After the metal salts were added, the new peaks at 1583 and 1025 cm −1 could be assigned to the COOH asymmetric stretching and CCH 3 stretching vibrations, respectively. [ 22 ] In addition, the SEM images of the anode by electrochemically depositing Zn on CC are shown in Figure 1h,i. Dense Zn nanowires were coated on the surface of the carbon fibers, resulting in an all‐in‐one Zn nanowires/CC anode.…”

Zn salts incorporated polyurethane/polyacrylonitrile electrospinning fiber membrane for high porosity polymer electrolyte in Zn ion battery

“…The Zn(CH 3 CO 2 ) 2 modified PU/PAN fiber (Fig. 3 b) presented peaks at 1067, 690, and 615 cm −1 , which correspond to the deformation vibration of Zn–O, acetate anion twisting, and scissoring, respectively 21 , 46 . The results revealed non-apparent bands of chemical bonding from specific sides of the PU/PAN fiber and zinc acetate salt.…”

Characterization of polar groups in polyvinyl chloride–ethyl vinyl acetate blends using coincidence Doppler broadening spectroscopy

“…In other words, how to trap positron and form positronium pseudo-atom (Ps) by polar groups such as acetate group, which include negative charge in carbon-oxygen dipoles (-C + =O), has received more attention. 2 In general, the polyvinyl chloride-ethyl vinyl acetate (PVC-EVA) polymer mixture that includes conjugated groups such as C=C and C=O in which the polymer mixture can obtain different energy and stability. Considering that in each of the above conjugated groups, due to the level of p-level orbitals, the PVC-EVA polymer mixture can create a bridge between the adjacent bonds of each polymer.…”

“…One of the important characteristics of polymers is related to the connection of the polar carbonyl group with the carbon–oxygen double bond. In other words, how to trap positron and form positronium pseudo‐atom (Ps) by polar groups such as acetate group, which include negative charge in carbon–oxygen dipoles (–C + =O), has received more attention 2 . In general, the polyvinyl chloride–ethyl vinyl acetate (PVC–EVA) polymer mixture that includes conjugated groups such as C=C and C=O in which the polymer mixture can obtain different energy and stability.…”