Kinerja Paduan Grafitik Karbon (Grafena dan N-Grafena) dengan Logam Besi, Litium dan Mangan sebagai Anoda Baterai Sekunder

Abstract

Research performance of Fe/Graphitic carbon (Graphene and N-Graphene), Li/Graphene Carbon (Graphene and N-Graphene) and Mn/Graphytic Carbon (Graphene and N-Graphene) as secondary battery anodes has been carried out. The purpose of this study is to determine the effect of the concentration, size and distribution of Fe, Li and Mn metal particles on graphene and graphene based on graphene and graphene made from graphite on the structure, morphology, interaction and electrochemical performance of each alloy electrode material as a secondary battery anode. This research is a laboratory and descriptive experimental research. Graphene is synthesized by the modified Hummer method, N-graphene is produced by the nitrogen dopant method at room temperature (25°C), while for Fe/graphene, Fe/N-graphene, Li/graphene, Li/N-graphene, Mn/graphene, and Mn/N-graphene materials are each synthesized by impregnation method. The novelty of this research is 1) using graphite carbon materials (graphene and N-graphene) produced by graphite material with various analyzes to determine the structure and morphology of the material and 2) using a non-Li metal alloy anode/carbon graphite (Fe/graphene, Fe/N-graphene, Mn/graphene, and Mn/N-graphene). The important concepts offered from this research are 1) graphite carbon has a bond, large surface area, and high electrical conductivity, 2) transition metal alloys/graphitic carbon, respectively, (Fe and Mn)/( graphene, N-graphene) with chemical bonds (-d), and 3) Modifying the E°cell of non-Li metals to be able to resemble Li metal. Based on the research results, Fe, Li and Mn metals have been successfully synthesized with graphene and N-graphene. XRD data show that the presence of weak and dilated peakS C (002) of Carbon Graphytics at 2θ = 26.24o, as well as sharp peaks at 44.72o, 44.70 and 34.97 Carbon Fe/Graphitic phalanxics (Graphene and N-Graphene), Li/Graphitic Carbon (Graphene and N-Graphene) and Mn/Graphene Carbon (Graphene and N-Graphene) indicate that Fe, Li and Mn metals are deposited in carbon graphytics (Graphene and N-Graphene). This data are well confirmed with SEM-EDX data which proves that each metal has been perfectly deposited and TEM data with the best concentration on each metal of 40% proves that each metal has been perfectly deposited in Graphene and N-Graphene. The maximum capacity result was achieved by adding 40% Mn to N-graphene which is 6.51 mAh/cm2 which is 2 to 3 times higher than the capacity of commercial batteries. From the impedance test, it is stated that an increase in the dodging concentration of Fe and Mn metals is able to improve electrical conductivity and lower the charge transfer resistance which is directly related to an increase in the specific capacitance value or charge capacity of the electrode.