Vo, Thanh, Trung Phung, Hoang Truong, Linh Nguyen, Oanh Nguyen, and Phung Le. 2019. “Physical-Chemical and Electrochemical Properties of Sodium Ion Conducting Polymer Electrolyte Using Copolymer Poly(vinylidene Fluoride- Hexafluoropropylene) (PVDF-HFP)/ Polyethylene Oxide (PEO)”. Science and Technology Development Journal 22 (1), 147-57. https://doi.org/https://doi.org/10.32508/stdj.v22i1.1230.