Study On The Preparation Of Titanium-nickel Alloy And Titanium Carbide-derived Carbon By Molten Salt Electrolysis

With the rapid development of the research and application of nanomaterials,multipurpose and new functional carbon materials have been paid much attention.Carbide-derived carbon(CDC)is prepared from carbide precursor by removing the non-carbon atoms in the lattice,the carbon skeleton structure formed a new carbon material.Almost all the allotropes and all organizational structures of carbon can be obtained by choosing appropriate carbon precursor and reasonable preparation conditions.Titanium-nickel alloy is a kind of special shape memory alloy and is able to restore its plastic deformation to the original shape at a certain temperature.TiC was used raw material in this work to prepare titanium-nickel alloy and titanium carbide-derived carbon in KCl-NaC1-xNiCl2 molten saltby molten salt electrolysis.The cathode product was characterized by XRD,SEM and EDS to study the morphology and the composition.The anode product CDC was characterized b y XRD,SEM,TG-DSC,Raman,IR and TEM.The charge-dischargetests were carried out to study lithium storage properties of CDC.The results showed that the cathode product was Ti-Ni alloy and the nickel content in the product increased with the increase of NiCl2 in the molten salt.CDC had diversified structures and are e mainly amorphous carbon and graphitized carbon in which the amorphous carbon were in the majority.The orderly degree of graphitization of carbon increased with the increasing electrolytic temperature.The electrochimcal property of the CDC was investiageted as anode materials for lithium-ion battery.Its cycle performance was stable at low rate with the first discharge capacity up to 402.4mAh/g at 0.1C rate.The result further confirmed that the CDC is consisted of disordered microporous amorphous carbon and ordered pore graphite carbon.