Preparation and characterization of Jatropha oil-based Polyurethane as non-aqueous solid polymer electrolyte for electrochemical devices

• Published in: Electrochimica acta Vol. 222; pp. 293 - 302
• Main Authors: Mustapa, Siti Rosnah, Aung, Min Min, Ahmad, Azizan, Mansor, Ahmad, TianKhoon, Lee
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 20-12-2016
• Subjects: ionic conductivity; Jatropha oil-based polyurethane; Polyol; solid polymer electrolyte; Jatropha oil-based polyurethane; ionic conductivity; Polyol; solid polymer electrolyte
• ISSN: 0013-4686; 1873-3859
• DOI: 10.1016/j.electacta.2016.10.173

Jatropha-oil based polyurethane is one of the initiative for replacing conventional petroleum based polyurethane. The vegetable oil-based polyurethane is more cost-effective and synthesize from renewable resources. Polyurethane was synthesized through prepolymerization method between jatropha oil-based polyol and diphenylmethane 4, 4’diisocyanate, (MDI) in inert condition. Then, lithium perchloride ion (LiClO4) was added to the polyurethane system to form electrolyte film via solution casting technique. The polymer electrolytes were prepared by varying the amount of LiClO4 ion 10wt.% to 30wt. %. The highest conductivity is achieved at 25wt.% of LiClO4 salt content, which is 1.29×10−4S/cm at room temperature 30°C. The FTIR results showed the shifting of carbonyl group (CO) (1750cm−1– 1730cm−1), ether and ester group (C-O-C) (1300cm−1–1000cm−1) and amine functional groups (N-H) (1650cm−1–1500cm−1) in polyurethane electrolytes from the blank polyurethane shows that oxygen and nitrogen atom acts as electron donor in the electrolytes system. It also confirmed that the intermolecular reaction had occurred in the electrolytes system. While, the XRD analysis showed the semi-crystalline properties of polyurethane have been reduced to amorphous phase upon the increasing addition of lithium ion. SEM results revealed the morphology analysis of the polyurethane electrolytes. There is homogenous and smooth surface in polyurethane and the dissociation of salt was observed after the addition of salt indicates there was interaction between salt and the polymer host.