Mechanical strength and ionic conductivity of polymer electrolyte membranes prepared from cellulose acetate-lithium perchlorate

Innovation in Polymer Science and Technology 2016

材料科学;化学

Sudiarti, T.^1,2 ; Wahyuningrum, D.^2 ; Bundjali, B.^2 ; Made Arcana, I.^2

Chemistry Department, State Islamic University Sunan Gunung Djati Bandung, Bandung, Indonesia^1

Department of Chemistry, Faculty of Mathematics and Natural Sciences, Bandung Institute of Technology, Bandung, Indonesia^2

关键词: Cellulose acetate membrane;    Elongation at break;    Fourier transform infra reds;    Liquid electrolytes;    Lithium perchlorate;    Polymer electrolyte membranes;    Solid polymer electrolytes;    Spectroscopy measurements;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/223/1/012052/pdf
DOI  :  10.1088/1757-899X/223/1/012052

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The need for secondary batteries is increasing every year. The secondary battery using a liquid electrolyte has some weaknesses. A solid polymer electrolyte is the alternative electrolytes developed to replace the liquid electrolyte type. This study was conducted to determine the effect of lithium perchlorate content on the polymer electrolyte membranes of cellulose acetate-LiClO4. The cellulose acetate-LiClO4membranes were prepared by mixing cellulose acetate and LiClO4in various compositions using tetrahydrofurane (THF) as solvent. The effect of LiClO4ratios on the polymer electrolyte membranes was studied by analysis of the functional groups using FTIR (Fourier Transform Infrared) spectroscopy measurement, the ionic conductivity by EIS (Electrochemical Impedance Spectroscopy) method, and mechanical properties by tensile tester measurements. The ionic conductivity of the membranes increased with the increasing in the ratios of lithium perchlorate content in the membranes and reached the optimum value at 1.79×10-4S cm-1corresponded to the cellulose acetate doped with 25% (w/w) LiClO4membrane. The presence of 10% (w/w) LiClO4content within cellulose acetate membranes can increase the mechanical properties of the membranes from 19.89 to 43.29 MPa for tensile strength, and from 2.55 to 4.53% for elongation at break. However, when the cellulose acetate membranes containing ratio of LiClO4more than 10% (w/w), consequently the tensile strength tended to decrease and the elongation at break was increased.