The Preparation Of Ni（OH）₂Mixing With Graphene Oxide And Studying The Electrical Performance

In this paper, MH-Ni batteries are researched and discussed about its development and the synthesismethods; and also discuss the developments, synthesis methods and the existent problems of grapheneoxide and graphite. Especially, the preparation of electrolytic graphite oxide and chemical graphite oxideare the key points, then the new MH-Ni batteries cathode material via graphene oxide mixing with Ni（OH）₂can be prepared. The major contents and conclusions are as follows:（1） With a piece of graphite as anode, a piece of nickel as negative, secondary distilled water aselectrolyte, through this electrolytic method we can get the graphite oxide emulsion whose dispersivity isgood. Compared with graphite oxide from Hummers method, graphite oxide get from electrolysis methodis characterized by simple preparation, good dispersion and high purity and the advantages of greenenvironmental protection. When hydrazine hydrate is reductant, the dispersion and stability of grapheneoxide are good.（2） The Ni（OH）₂doping with graphene oxide which from electrochemical method and Hummersmethod have the same structure and morphology as the pure Ni（OH）₂. Graphene oxide embedded andwrapped in Ni（OH）₂grain as undefined structure. Electrochemical impedance research shows that theNi（OH）₂doping with electrolytic graphene oxide can reduce the resistance and improve the charge transferion rate of expansion. The charging and discharging experiment results show that the Ni（OH）₂doping witha small amount of electrolytic graphene oxide has a good electrochemical performance; in0.2C5C and10C, the intal discharge capacity can reach326.8mAh/g,206.4mAh/g and179.3mAh/g, all of theseexpressions show the materials have superior high capacity and high rate capability.