Graphite and graphene oxide electrodes for lithium ion batteries

• The pure graphite exhibits sharp peak at 26° which corresponds to (0 0 2) plane.
• TEM image shows a typical size of several microns in dimension with wrinkled texture of GR oxide sheets.
• Both graphite oxide and graphene oxide can be used as positive and negative masses in batteries.

Graphite oxide (GRO) was synthesized using Hummer's method by oxidation of pure graphite and subsequently converted into graphene oxide (GR) by a chemical conversion method to be used as electrode material in the lithium-ion batteries. Obtained materials were characterized using X-ray diffraction, scanning electron microscopy, transmission electron microscopy and Raman spectroscopy. Transmission electron microscopy results reveal cloth-type structure of GRO and GR with a thickness of 10 nm. The specific discharge capacity of GRO electrode on stainless-steel mesh is 759.4 mAh/g at a current density 100 mA/g and 796.2 mAh/g at 50 mAh/g; on copper mesh 940 mAh/g at current density 50 mA/g and 825 mAh/g at 100 mA/g With a GR electrode on stainless-steel mesh a capacity of 897.7 mAh/g at 50 mA/g and 786.9 mAh/g at 100 mA/g and on copper mesh 824 mAh/g and 790 mAh/g at current densities 50 and 100 mA/g were obtained.

XRD patterns of graphite, graphite oxide and graphene oxide.Figure optionsDownload as PowerPoint slide