Open AccessLithium Salt Doped Poly(Vinylidene Fluoride)/Cellulose Acetate Composite Gel Electrolyte Membrane for Lithium Ion Battery
Author(s) -
Muhammad Rehman Asghar,
Muhammad Tuoqeer Anwar,
Tahir Rasheed,
Ahmad Naveed,
Xiaohui Yan,
Junliang Zhang
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/654/1/012017
Subject(s) - electrolyte , cellulose acetate , membrane , polyvinylidene fluoride , materials science , separator (oil production) , cellulose , conductivity , ionic conductivity , inorganic chemistry , chemical engineering , chemistry , organic chemistry , electrode , biochemistry , physics , engineering , thermodynamics
In this study, composite gel electrolyte based on Polyvinylidene fluoride (PVDF)/cellulose acetate with the addition of different proportions of lithium nitrate (LiNO 3 ) is prepared by a simple casting method. Salt doping effects on gel electrolyte membrane is investigated by scanning electron microscopy, X-ray analysis, DSC, FT-IR and TGA analysis. Salt doped gel electrolyte membrane shows a porous structure with a high uptake of 150%. Furthermore, with the addition of 20 wt% salt in the gel electrolyte membrane increase the ion conductivity from 0.21×10 −3 S cm −1 to 3.0×10 −3 S cm −1 at room temperature after soaking 1M LiPF 6 EC/DEC liquid electrolyte. As compared with PP 2325 separator, pristine PVDF and PVDF/cellulose acetate gel electrolyte membrane, the salt doped PVDF/cellulose acetate membranes exhibit wide electrochemical window and lower interfacial resistance. Composite gel electrolyte membrane with 10 wt% salt contents possess 100% capacity retention after 100 cycles at 1C rate as compared to PP 2325 separator which shows only 87% capacity retention.