Synthesis of Reduced Graphene Oxide/ Cobalt Oxide Composite as a Super Capacitor Electrode Material Using the Compounds Obtained by Recycling Lithium-Ion Batteries

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dc.contributor.authorSamaranayaka, M.N.D.I.R.
dc.contributor.authorPitawala, H. M. J. C.
dc.contributor.authorKumarage, W.G.C.
dc.date.accessioned2021-02-25T04:31:38Z
dc.date.available2021-02-25T04:31:38Z
dc.date.issued2020
dc.description.abstractToday Lithium-ion batteries (LIBs) are widely used in many portable electronic devices, hybrid electric vehicles, and electric vehicles due to their unique features. However, the rapid increment in the disposal of used LIBs to the environment causes severe damages to the environment due to the presence of heavy metals. Thereby environmentally friendly recycling processes are important for LIBs in aspects such as recovering valuable metals from spent LIBs. In this work, a composite electrode material prepared using cobalt oxide (Co3O4) and reduced graphene oxide (rGO) synthesized respectively from cathode and anode material of spent LIBs is described. The battery type considered here was Sony Phone Battery (AGPBO16-A001). Cathode material was subjected to an acid leaching process using 2M H2SO4 along with 10% H2O2 followed by collective precipitation. The pink colour precipitate, obtained at pH 1.5 was confirmed as CoC2O4 using X-ray diffraction technique, Fourier-transform infrared spectroscopy, and X-ray fluorescence data. Subsequently, the annealed sample at 450 0C for 2 hours was undergone with the above tests and conformed as Co3O4 with a crystallite width of 17.7 nm. rGO was synthesized from the anode material using sonication assisted oxidation of graphite. rGO showed an interlayer spacing of 3.4 A0 and a crystallite width of 7 A0 . Composites were prepared on a copper foil by varying the mass ratio of rGO and Co3O4. All the grown samples were examined for cyclic voltammetry measurements in the same photo electrochemical cell. The best electrochemical performance was shown by the composite with the mass ratio of rGO: Co3O4, 1:4. In future methods will be investigated to improve the capacitance of the composite electrode material. Keywords: Lithium-ion Battery, Composite, Acid leaching, Capacitanceen_US
dc.identifier.isbn9789550481293
dc.identifier.urihttp://www.erepo.lib.uwu.ac.lk/bitstream/handle/123456789/6082/proceeding_oct_08-444.pdf?sequence=1&isAllowed=y
dc.language.isoenen_US
dc.publisherUva Wellassa University of Sri Lankaen_US
dc.relation.ispartofseries;International Research Conference
dc.subjectMaterials Sciencesen_US
dc.subjectMineral Sciencesen_US
dc.subjectRecyclingen_US
dc.subjectPollutionen_US
dc.titleSynthesis of Reduced Graphene Oxide/ Cobalt Oxide Composite as a Super Capacitor Electrode Material Using the Compounds Obtained by Recycling Lithium-Ion Batteriesen_US
dc.title.alternativeInternational Research Conference 2020en_US
dc.typeOtheren_US
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