scholarly journals Lignin-Based Gel Polymer Electrolyte for Cationic Conductivity

Polymers ◽  
2021 ◽  
Vol 13 (14) ◽  
pp. 2306
Author(s):  
Nabi S. Shabanov ◽  
Kamil Sh. Rabadanov ◽  
Malik M. Gafurov ◽  
Abdulgalim B. Isaev ◽  
Dinara S. Sobola ◽  
...  
Keyword(s):  
Ionic Conductivity ◽  
Polymer Electrolyte ◽  
Gel Polymer Electrolyte ◽  
Chemical Conversion ◽  
Record Values ◽  
Lithium Cation ◽  
Chemical Calculation ◽  
Qualitative And Quantitative Analysis ◽  
Maximum Value ◽  
Time Record

The article presents the results of the preparation and study of a gel-polymer electrolyte based on lignin obtained from Pinus sylvestris. Sulfonation and subsequent chlorination of lignin make possible implementation of the principle of mono-ionic conductivity in a natural biopolymer matrix, which provides predominantly cationic conductivity of the electrolyte. Based on the results of the qualitative and quantitative analysis of the synthesized samples, the mechanisms of the chemical conversion of the biopolymer, the structure models of the converted fragments of macromolecules, as well as the quantum-chemical calculation of their electronic and geometric parameters are presented. The key electronic characteristics of the gel polymer electrolytes (GPE) based on a composite of lignins with 20 wt.% polyvinyl alcohol are determined by impedance spectroscopy. The maximum value of the specific volume conductivity is 2.48 × 10−4 S cm−1, which is comparable with most commercial electrolytes of this type, but at the same time, record values are reached in the number of lithium cation transfer tLi+ of 0.89. The studies allow to identify the basic laws of the effect of chemical modification on the structure of GPE and describe the mechanism of ionic conductivity.

Sago Gel Polymer Electrolyte for Zinc-Air Battery

2010 ◽  
Vol 72 ◽  
pp. 305-308 ◽  
Author(s):  
M.N. Masri ◽  
M.F.M. Nazeri ◽  
A.A. Mohamad
Keyword(s):  
Ionic Conductivity ◽  
Polymer Electrolyte ◽  
Discharge Capacity ◽  
Potassium Hydroxide ◽  
Gel Polymer Electrolyte ◽  
Practical Capacity ◽  
Air Battery

A sago-based gel polymer electrolyte (GPE) was prepared by mixing native sago with potassium hydroxide (KOH) aqueous in order to investigate the applicability of GPE to zinc-air (Zn-air) battery. The viscosity and conductivity of the sago GPE were evaluated using varying sago amounts and KOH concentrations. The viscosity of the sago GPE was kept as a reserve in the region of ~ 0.2 Pa s as the KOH concentration was increased from 2 to 8 M. Sago GPE was found to have an excellent ionic conductivity of (4.45  0.1) x 10-1 S cm-1 with 6 M KOH. GPE was also employed in an experimental Znair battery using porous Zn electrode as the anode. The battery shows outstanding discharge capacity and practical capacity obtained of 505 mA h g-1.

Poly(vinylidenefluoride-co-hexafluoropropylene): An Emerging Host Material for Ion Conducting Gel Polymer Electrolyte-Cum-Separator Membrane

2020 ◽  
Vol 12 (1) ◽  
pp. 50-59
Author(s):  
Shivani Gupta ◽  
Sarvesh Kumar Gupta ◽  
B. K. Pandey ◽  
A. K. Gupta
Keyword(s):  
Ionic Conductivity ◽  
Polymer Electrolyte ◽  
Rational Design ◽  
Vinylidene Fluoride ◽  
Storage System ◽  
Gel Polymer Electrolyte ◽  
Rechargeable Batteries ◽  
Safety Issues ◽  
Ion Conducting ◽  
High Dielectric

Secondary batteries based on ion conduction are among the most promising technology for next generation mobile and stationary storage system due to their unmatched volumetric energy density. However the multiple emerging challenges which include electrochemical stability, transport efficiency and safety issues of these secondary batteries have attracted worldwide attention. The perspective of this review is that rational design of polymeric separator which is an essential component in rechargeable batteries separating anode and cathode, and controlling number of mobile ions is crucial to overall battery performance, including lifetime, safety as well as energy and power density of battery. There is impressive progress in the exploration of separator materials. Among them, poly(vinylidene fluoride-co-hexafluoropropylene) P(VdF-co-HFP) have received great attention as polymer host due to some its splendid collective property such as its amorphous nature, high room temperature ionic conductivity, high dielectric constant and the possibility of controlling the porosity of the materials through binary and ternary polymer/solvent systems. This review focuses specifically on recent advances in P(VdF-co-HFP) based separator cum gel polymer electrolyte with detailed analysis of several embedded functional agent that are incorporated to improve ionic conductivity, mechanical robustness and thermal stability of rechargeable batteries.

Poly(acrylamide-co-acrylic acid) gel polymer electrolyte incorporating with water-soluble sodium sulfide salt for quasi-solid-state quantum dot-sensitized solar cell

2020 ◽  
Vol 32 (2) ◽  
pp. 183-191
Author(s):  
YC Lee ◽  
MH Buraidah ◽  
HJ Woo
Keyword(s):  
Ionic Conductivity ◽  
Acrylic Acid ◽  
Quantum Dot ◽  
Polymer Electrolyte ◽  
Sodium Sulfide ◽  
Ethylene Carbonate ◽  
Gel Polymer Electrolyte ◽  
Liquid Electrolyte ◽  
Water Soluble ◽  
Poly Acrylamide

Rapid decay of photoanode, leakage from sealant, and evaporation of electrolyte are always the major concerns of quantum dot-sensitized solar cells (QDSCs) based on liquid electrolyte. Subsequently, gel polymer electrolyte (GPE) appears as an attractive solution in addition to lower cost, lighter weight, and flexibility. Poly(acrylamide- co-acrylic acid) (PAAm-PAA) is of special interest to act as a polymer host to entrap liquid electrolyte because it provides high transparency, good gelatinizing properties, and excellent compatibility with the liquid electrolyte. In this work, the electrical and transport properties of PAAm-PAA GPE incorporating with water-soluble sodium sulfide were characterized by impedance spectroscopy. An increment of ionic conductivity was observed with the incorporation of ethylene carbonate (EC) and potassium chloride (KCl). The highest room temperature ionic conductivity of PAAm-PAA GPE is 70.82 mS·cm−1. QDSC based on PAAm-PAA GPE with the composition of 1.3 wt% of KCl, 0.9 wt% of EC, 55.3 wt% of PAAm-PAA, 38.5 wt% of sodium sulfide, and 4.0 wt% of sulfur can present up to 1.80% of light-to-electricity conversion efficiency.

scholarly journals High-Voltage Sulfolane Plasticized UV-Curable Gel Polymer Electrolyte

Polymers ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 1306
Author(s):  
Shiqi Wang ◽  
Chun Wei ◽  
Wenwen Ding ◽  
Linmin Zou ◽  
Yongyang Gong ◽  
...  
Keyword(s):  
Activation Energy ◽  
Ionic Conductivity ◽  
Polymer Electrolyte ◽  
High Voltage ◽  
Gel Polymer Electrolyte ◽  
Liquid Electrolyte ◽  
Temperature Conductivity ◽  
Electrochemical Window ◽  
Specific Discharge ◽  
Discharge Capacities

A high-voltage electrolyte can match high-voltage positive electrode material to fully exert its capacity. In this research, a sulfolane plasticized polymer electrolyte was prepared by in situ photocuring. First, the effect of the sulfolane content on the ionic conductivity of the gel polymer electrolyte was investigated. Results showed that the ionic conductivity variation trend was in good agreement with the exponential function model for curve fitting. Second, the activation energy was calculated from the results of the variable temperature conductivity tests. The activation energy was inversely proportional to the sulfolane content. For the sulfolane content of 80 wt. % in gel polymer electrolyte (GPE)-80 (19.5 kJ/mol), the activation energy was close to conventional liquid electrolyte (9.5 kJ/mol), and the conductivity and electrochemical window were 0.64 mS/cm and 5.86 V, respectively. The battery cycle performance test showed that the initial specific discharge capacities of GPE-80 and liquid electrolyte were 176.8 and 148.3 mAh/g, respectively. After 80 cycles, the discharge capacities of GPE-80 and liquid electrolyte were 115.8 and 41.1 mAh/g, and the capacity retention rates were 65.5% and 27.7%, respectively; indicating that GPE-80 has a better specific discharge capacity and cycling performance than the liquid electrolyte. SEM images indicated that GPE-80 can suppress the growth of lithium dendrites. The EDS test showed that GPE-80 can inhibit the dissolution of metal ions in the cathode material.

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