Properties and Performance of Gas Diffusion Layer PEMFC Derived from Coconut Coir - Destyorini, Fredina; Fuel Cell and Hydrogen Technology Research Group, Research Center for Physics, Indonesian Institute of Sciences (LIPI), Bld 440-442 Kawasan Puspiptek, Tangerang Selatan, Banten 15314, (ITB Journal Publisher, LPPM ITB, 2018)