SYNTHESIS AND CHARACTERIZATION OF GRAPHENE FROM COCONUT FIBER (COCOS NUCIFERA) AS ANODE MATERIALS FOR LI-ION BATTERY

Indra Gunawan; Wagiyo H; Bambang Sugeng; Sudaryanto Sudaryanto

doi:10.17146/jsmi.2019.20.3.5475

SYNTHESIS AND CHARACTERIZATION OF GRAPHENE FROM COCONUT FIBER (COCOS NUCIFERA) AS ANODE MATERIALS FOR LI-ION BATTERY

Indra Gunawan⁽¹⁾, Wagiyo H⁽²⁾, Bambang Sugeng⁽³⁾, Sudaryanto Sudaryanto⁽⁴⁾,

(1) Center for Science and Technology of Advanced Materials, National Nuclear Energy Agency
(2) Center for Science and Technology of Advanced Materials, National Nuclear Energy Agency
(3) Center for Science and Technology of Advanced Materials, National Nuclear Energy Agency
(4) Center for Science and Technology of Advanced Materials, National Nuclear Energy Agency

Corresponding Author

Abstract

Synthesis of graphene from coconut fiber conducted in two stages. The first stage is heating the powder of coconut fiber that passes 325 meshes by hydrothermal method at 200^o C for 4 hours. Furthermore, the pyrolysis then treated at temperature of 1000° C for 2 hours. The grain size and surface morphology from graphene observed using SEM in the 1000X magnification. From the SEM image of graphene, it shows the pattern of several thick layers build mutual three-dimensional, forming a flake structure. Observations also show stacks of graphene structure with more big flakes forming a thick pallet. Another characterization was performed by using X-ray diffractometer (XRD), Raman Spectrometer and LCR meter. From XRD observation there is an amorphous pattern at the first stage of synthesis, after pyrolysis at 1000^o C for 2 hour a peak near 2θ = 24^o, 42^oand 52^o which corresponds to crystal indexes (002), (400) and (511) became visible. The peak at around 1350 cm^-1 in the Raman is the D band. The D band is represented defects, like disruption in the sp² bonding because of heptagon and pentagon rings, vacancies, edge effect, and etc. DC conductivity or bulk electrical conductivity of about 4.6 x 10^-³ Scm^-1.