Hydrothermal Of LiMPO₄Lithium Ion Battery Anode Materials Prepared By The Method Of Research

Compared to other rechargeable batteries, lithium ion batteries have many advantages, such as:good cycle performance, low self-discharge rate, no memory effect and environmental protection materials, etc. The anode material in lithium ion battery part of an important part, so in the development and application of lithium ion battery research and development of the anode materials is extremely seriously. The development of positive electrode materials can improve the battery performance and reduce the cost of the battery. Now a lot of materials for lithium ion battery research from the phase of the study of body, however the battery internal impedance equivalent circuit and the simulation analysis is relatively rare, therefore, the water hot method and coprecipitation method this paper with the method of synthesis of the anode material cycle performance is very good, so this article mainly from the analysis of lithium ion battery internal impedance and simulate its equivalent circuit on the cycle performance related research work.Phosphate is a lithium ion battery cathode material has wide raw material sources, low cost, environmental non-toxic materials, high specific capacity, stable working voltage and good performance characteristics, such as cycle become commercialized LiCoO2cathode material ideal substitute material.From is beneficial to industrialized production, no pollution and lower cost to the environment of starting point, the purpose of this paper is to improve the phosphate cycle performance of lithium ion battery anode materials. In the hybrid of different transition metal and lithium lithium phosphate in different proportion, and found the composite material cycle performance is good, electricity chemistry workstation on the impedance test again, and from the measured impedance graph to simulate a series of equivalent circuit, then to analyze it. The experiment of hydration heat and the method of coprecipitation method for synthetic materials.Choose in the preparation of lithium phosphate mixed optimal proportion of transition metals, so that the cycle performance is more superior. Electricity chemical workstation for synthetic materials assembled into battery impedance measurement. And its circuit of fitting for the simulation of equivalent circuit, and thus a better analysis of the material between the wheat from the chaff.This kind of method of synthetic conditions of preparation of lithium phosphate series, metal ion concentration0.1mol/L, lithium salt solution concentration is0.3mol/L, phosphate concentration is0.1mol/L, also reducing agent choose citric acid added phosphate and the molar volume of the same. After full reaction, join the hydrothermal synthesis of kettle.24h reaction temperature200℃. reaction time, after the preparation of samples, electricity chemistry workstation to test it again. This article mainly for Fe and Mn in different proportion of synthetic materials, Fe and Co in different proportion of synthetic materials, Fe and Ni composite materials with different proportion to its impedance and equivalent circuit analysis and processing research.