Synthesios And Properties Of High-performance Lithium Ion Battery Cathode Materials

Lithium-ion battery(LIB),being a new generation of secondary batteries with a small self-discharge,high voltage and other advantages,has become one of the best choices for the new century.Until now,lithium-ion battery has been widely used in portable devices.At present,more and more works focusing on cathode materials have been explored,since it has been a key factor,inhibiting the development for lithium ion batteries.However,since the development of lithium-ion battery,researches for cathode materials have been relatively few.Compared with the anode materials,researches for cathode materials has become more important,which significantly influence the performance of lithium-ion batteries.In this paper,FeF3-based nanomaterials have been prepared via a simple solvothermal method.When the materials were used as cathode materials for lithium ion batteries,they possess a superior electrochemical behavior.The main contents as follows:1.Preparation and electrochemical performance of iron trifluoride cathode materials.By using commercial inorganic fluorides and inorganic iron salts as the raw materials,iron trifluoride nanomaterials were successfully synthesized by a simple solvothermal method.The composition,morphology and size for the products could be easily controlled by adjusting the amounts of reactants,reaction time and solvent composition.When the materials were used as cathode materials for lithium ion batteries,they possess a superior electrochemical behavior.The successful preparation of iron trifluoride opens a new way for the synthesis of iron trifluoride.2.Preparation and electrochemical performance of iron trifluoride/three-dimensional graphene composite nanomaterials.The three-dimensional graphene materials were synthesized by a hard template method.The effects of the amount of template and catalyst on the structure and morphology of three-dimensional graphene have been studied.The iron trfluoride/three-dimensional graphene composites were prepared by a solvothermal method.The effect of experimental conditions,such as the amount of catalysts and templates on the structure and composition of the material has been investigated.When used as the cathode materials of lithium ion batteries,the obtained material exhibited a good cycling stability and high reversible capacity.