The Synthesis And Modification Research Of Lithium Zinc Titanate Anode Material

This article is mainly focus on the research of Li₂ZnTi₃O₈ anode material for lithium ion battery.This article synthesized Li₂ZnTi₃O₈ anode material via some different methods?such as sol-gel method,one pot co-precipitation method and microwave method?and some modification research has been conducted on Li₂Zn Ti₃O₈ anode material.Firstly,this article has determined the optimum calcination condition of sol-gel method.Precursor was preheated at 350 ^oC for 4 hours and calcinated 700 ^oC for 10hours manifested the best electrochemical property.Li₂MoO₄ modified Li₂Zn Ti₃O₈anode material has been synthesized via wet chemical method.12.12%Li₂MoO₄modified Li₂ZnTi₃O₈ anode material has best electrochemical property?such as long cycle performance and high rate property?among all samples.These results show that Li₂MoO₄ can efficiency modified the electrochemical performance of Li₂ZnTi₃O₈anode material.Secondly,a new method?co-precipitation method?has been used to synthesize Li₂Zn Ti₃O₈ anode material.This article has used Fe element doping into Li₂ZnTi₃O₈anode material to improve its property.The results show that Fe doped Li₂ZnTi₃O₈anode material can improve electrochemical performance and won't change its texture.Li₂Zn Fe_0.05Ti_2.95O₈ anode material has the best electrochemical among all samples.Fe doping is an efficiency method mainly owing to the improvement of Li⁺diffusion coefficient and decrease of charge transfer resistance.This article also synthesized Li₂ZnTi₃O₈/TiO₂ anode material via co-precipitation method.The long cycle property and high rate performance are extremely excellent.In high rate charge/discharge tests,the capacity is degraded not seriously after 1000 cycles and Li₂ZnTi₃O₈/TiO₂ anode material possesses excellent property.Li₂Zn Ti₃O₈/TiO₂ anode material can serve as one kind of materials for electric car.Last,this article synthesized Li₂ZnTi₃O₈ anode material via new method-microwave method.So far,there is no article has been reported microwave method to synthesize Li₂ZnTi₃O₈ anode material and this article synthesized it for the first time.This article researched the difference of microwave power on the influence of Li₂Zn Ti₃O₈ anode material and determined the optimum microwave power is 780 W.