Purnama H, Hartoko IV, Mujiburohman M, Hidayati N. Effect of Graphene Oxide on the Characteristics of sPEEK-Chitosan Membranes for Direct Methanol Fuel Cells. AE [Internet]. 2020 Apr. 6 [cited 2026 Oct. 12];3(1):1-5. Available from: https://journal.unimma.ac.id/AutomotiveExperiences/article/view/3039