Study On Preparation Of Anode Materials For Lithium Batteries By Calcination Of Metal Organics

With the rapid development of society,people's demand for new energy is growing.Although graphite as anode material has been successfully applied in the commercial LIBs,the lower theoretical capacity of 372 mAh g^-1 as well as the safety issue of graphite still greatly hampered the further applications of Lithium Ion Battery.In this paper,the method of calcining organic matter is used to prepare oxide as the anode material of lithium ion battery.The structure of the materials were investigated by X-ray diffraction?XRD?,scanning electron microscope?SEM?,and the electrochemical performance was mainly studied by using cyclic voltammetry?CV?,electrochemical impedance spectroscopy?EIS?and charge-discharge tests.The main experiments as follows:?1?A novel finding,that the combustion products of dimethyl silicone oil can be used as the anode materials for lithium ion batteries?LIBs?,was reported in this work.Namely,a proper amount of dimethyl silicone oil was burned at 800?in a muffle furnace for 2 h,leading to the formation of two kinds of products,namely,white particles and black particles.In this work,the composition,morphology and electrochemical properties of the samples after separation and mixing were studied.A new method has been developed to burn lithium-containing organic materials to prepare lithium ion battery anode materials.The raw material cost is low and the preparation method is simple.This method may be suitable for large-scale production of lithium ion battery anode materials,which is very meaningful for the development of lithium ion anode materials.?2?Erect and flaky particles of tin oxides?SnO₂?were prepared by a calcination method using dioctyltin oxide as the starting material,which were systematically investigated as anode materials for lithium ion batteries?LIBs?.This work explored the effects of different temperatures on material properties and the comparison of calcination in air and nitrogen at the same temperature.The results show that the specific discharge capacity is high,and the sample obtained by calcination at 500?in air has the best electrochemical performance.The initial capacity is 882.31 mAh g^-1,and the capacity is still 302.12 mAh g^-1 after 20 cycles,which has a higher discharge specific capacity.It is expected to be applied in the anode material of lithium ion batteries.?3?Nickel acetate was mixed into different solvents and calcined at 600?for 2 h to investigate the effect of different solvents on nickel acetate.The addition of the ionic liquid resulted in an octahedral structure of the calcined sample,and the product was found to be NiO by XRD and EDS tests.For the first time,this work produced octahedral NiO in this way.And through electrochemical testing,it is found that the first discharge specific capacity and cycle performance of the sample are better,and it is expected to be applied in the anode material of lithium ion battery.?4?The first release of this work will use the calcined soil as the anode material for lithium ion batteries.Characterization of the prepared materials by XRD indicated that SiO₂was the major component of all samples.The results demonstrate that temperature has a large effect on the morphology of the material and the electrochemical performance of the sample.In the electrochemical test,all samples can provide discharge capacity.The sample preparation process is simple,the raw materials are abundant,and the cost is low,which is very meaningful for the development of the anode material of the lithium ion battery.