Hot-pressing Carbon Lithium Ion Battert Anode Material Preparation And Characterization

Lithium ion battery has the advantages of high operating pressure, wide application temperature range, low self discharge rate, light pollution and so on. since the advent of Lithium-ion battery, it has developed rapidly and has been widely used in portable electronic products. In recent years, with the development of large-scale equipment, such as electric vehicles, the requirement of lithium-ion battery power density and energy density became higher. Lithium ion battery, as a complex energy storage system, its electrochemical performance is affected by many factors, such as electrode materials,electrolyte, separator and packaging technology, etc.. But it is generally believed that the electrode material of lithium ion battery plays a decisive role in the performance of lithium ion battery. Currently, commercialized lithium-ion battery anode material is graphite, its theoretical capacity is 372 m Ahg-1, it has been unable to meet market demand. Therefore,the design and preparation of high performance lithium ion battery with carbon based anode material has important significance and application value. With the development of high pressure technology, people gradually realized the importance of its application in the research of materials.In this paper, using adamantane powder as the precursor, new carbon materials were synthesized by high temperature and high pressure, and their structure, morphology and electrochemical properties were studied, including the following two aspects:(1) Under the conditions of high temperature and high pressure, the effects of temperature, pressure and heating rate on the morphology of carbon materials were studied; Based on the characterization of carbon materials under different conditions, we studied the influence of temperature, pressure and heating rate on the structure of carbon materials.(2) The electrochemical properties of the obtained carbon materials were tested. The results of the half cell show: the first charge and discharge process had a high irreversible capacity loss, and after that, the charge and discharge curves coincided, the material had good cycle performance. After running 200 laps at the 50mAg-1 current density, the lithium ion battery still retained the capacity of 686mAhg-1. In the current density 2000mAg-1, it still had the capacity of 221mAhg-1, so it had high-rate performace.We put forward the method of using high temperature and high pressure to prepare carbon material, the method is simple, green environmental protection, and can be industrialized production. More important, it is possible to replace the high-cost MCMB material. In addition, the carbon material can be used as an adsorbent material and a lubricant material in addition to the electrode material.