Electrical Properties of Starch/PEO Blend Polymer Electrolytes

Currently, scientific developments in both the academic and industrial research communities are giving much attention towards the development of green chemistry secondary ion batteries with safety attributes. Biodegradable starch polymer-based electrolyte systems doped with different inorganic salts are gaining much attention owing to their intriguing and non-toxic nature. In this context, several research approaches have been identified for the improvement of lithium-ion conductivities at ambient temperatures, thermal and mechanical properties of starch polymer-based electrolytes. The present review provides consolidated information on chronological developments in the fabrication of different types of starch-based electrolytes (i.e., pure, blend, plasticized, and nanocomposites) and discusses microstructural, thermal, mechanical, and lithium-ion conductivity properties given lithium-ion batteries. Among all types, ionic liquids doped starch-based electrolytes demonstrated appreciable room temperature Li-ion conductivities. In parallel, a comparative study on Na + , K + , NH 4 + , Ag + , and Mg 2+ -ions conductivities in starch-based electrolytes is presented to emphasize the further research scope on the development of novel secondary ion batteries in complementing with lithium-ion batteries.

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Review on Microstructural and Ion‐conductivity Properties of Biodegradable Starch‐Based Solid Polymer Electrolyte Membranes

Koduru

Marinov

Scaramuzza

2021

Starch Stärke

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Fabrication and characterization of magnesium—ion-conducting flexible polymer electrolyte membranes based on a nanocomposite of poly(ethylene oxide) and potato starch nanocrystals

Koduru

Marinov

Kaleemulla

et al. 2021

J Solid State Electrochem

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Influence of Lithium Triflate Salt Concentration on Structural, Thermal, Electrochemical, and Ionic Conductivity Properties of Cassava Starch Solid Biopolymer Electrolytes

Arrieta,

Calabokis,

Vanegas

2024

IJMS

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Cassava starch solid biopolymer electrolyte (SBPE) films were prepared by a thermochemical method with different concentrations of lithium triflate (LiTFT) as a dopant salt. The process began with dispersing cassava starch in water, followed by heating to facilitate gelatinization; subsequently, plasticizers and LiTFT were added at differing concentrations. The infrared spectroscopy analysis (FTIR-ATR) showed variations in the wavenumber of some characteristic bands of starch, thus evidencing the interaction between the LiTFT salt and biopolymeric matrix. The short-range crystallinity index, determined by the ratio of COH to COC bands, exhibited the highest crystallinity in the salt-free SBPEs and the lowest in the SBPEs with a concentration ratio (Xm) of 0.17. The thermogravimetric analysis demonstrated that the salt addition increased the dehydration process temperature by 5 °C. Additionally, the thermal decomposition processes were shown at lower temperatures after the addition of the LiTFT salt into the SBPEs. The differential scanning calorimetry showed that the addition of the salt affected the endothermic process related to the degradation of the packing of the starch molecules, which occurred at 70 °C in the salt-free SBPEs and at lower temperatures (2 or 3 °C less) in the films that contained the LiTFT salt at different concentrations. The cyclic voltammetry analysis of the SBPE films identified the redox processes of the glucose units in all the samples, with observed differences in peak potentials (Ep) and peak currents (Ip) across various salt concentrations. Electrochemical impedance spectroscopy was used to establish the equivalent circuit model Rf–(Cdl/(Rct–(CPE/Rre))) and determine the electrochemical parameters, revealing a higher conduction value of 2.72 × 10−3 S cm−1 for the SBPEs with Xm = 17 and a lower conduction of 5.80 × 10−4 S cm−1 in the salt-free SBPEs. It was concluded that the concentration of LiTFT salt in the cassava starch SBPE films influences their morphology and slightly reduces their thermal stability. Furthermore, the electrochemical behavior is affected in terms of variations in the redox potentials of the glucose units of the biopolymer and in their ionic conductivity.

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Electrical Properties of Starch/PEO Blend Polymer Electrolytes

Cited by 3 publications

References 10 publications

Review on Microstructural and Ion‐conductivity Properties of Biodegradable Starch‐Based Solid Polymer Electrolyte Membranes

Review on Microstructural and Ion‐conductivity Properties of Biodegradable Starch‐Based Solid Polymer Electrolyte Membranes

Fabrication and characterization of magnesium—ion-conducting flexible polymer electrolyte membranes based on a nanocomposite of poly(ethylene oxide) and potato starch nanocrystals

Influence of Lithium Triflate Salt Concentration on Structural, Thermal, Electrochemical, and Ionic Conductivity Properties of Cassava Starch Solid Biopolymer Electrolytes

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