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Cathode material of carbon in lithium ion battery in high capacity, and method

A negative electrode material and lithium battery technology, which is applied in the field of battery negative electrode material preparation, can solve the problems of limiting the high-current charge and discharge capacity of lithium-ion batteries, the deterioration of lithium-ion battery cycle performance, and affecting the rapid deintercalation of lithium ions. The effect of graphitization degree, good high current performance and simple preparation method

Inactive Publication Date: 2006-12-06
LANZHOU UNIVERSITY
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Problems solved by technology

Due to the small interlayer spacing of graphite (3.35 Ȧ), on the one hand, it affects the rapid deintercalation of lithium ions during the deintercalation process of lithium ions, which limits the high-current charge and discharge capacity of lithium-ion batteries; on the other hand, the intercalation of lithium ions will cause The expansion of graphite leads to the shedding of graphite sheets, which makes the cycle performance of lithium-ion batteries worse

Method used

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  • Cathode material of carbon in lithium ion battery in high capacity, and method
  • Cathode material of carbon in lithium ion battery in high capacity, and method

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[0015] Put the beer tank into the heating furnace, and fill the heating furnace with argon for protection. Firstly, heat the furnace at a rate of 20-50°C / min until the furnace temperature reaches 300°C±50°C, and then keep it warm so that the moisture in the wine tank can fully escape. After the moisture in the wine tank has fully escaped, this process can generally be completed after 1 hour of heat preservation. Then heat the furnace temperature at a rate of 20-50°C / min to 450°C±50°C, and keep warm to fully decompose the organic matter of distiller's grains and fully escape the generated gas. This process is generally completed in about two hours of heat preservation. Then the furnace temperature is heated at a rate of 20-50°C / min to 750°C±50°C, and then kept warm to fully carbonize the distiller's grains. This process generally takes about four hours to complete. During the entire treatment process of the aforementioned heating, the furnace should be filled with argon to i...

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Abstract

This invention discloses a method for manufacturing the cathode material for lithium batteries from distiller's grains. The method comprises: (1) putting the distiller's grains into an oven, and carbonizing under inert gas protection; (2) activating the carbonization product with a strong base solution; (3) washing the activation product with water till neutral, filtering to obtain the solid, and drying to obtain the cathode material for lithium batteries.

Description

technical field [0001] The present invention relates to a preparation method of a negative electrode material of a battery, and a negative electrode material of a battery prepared by the method, especially a negative electrode material used in a lithium battery, Background technique [0002] The negative electrode material of lithium ion battery is generally carbon material. The performance of carbon anode materials has a great influence on the charge and discharge performance of lithium-ion batteries. In recent years, the research on carbon anode materials is one of the hotspots in lithium-ion battery research, and the most studied carbon material is graphite. Due to the small interlayer spacing of graphite (3.35 Ȧ), on the one hand, it affects the rapid deintercalation of lithium ions during the deintercalation process of lithium ions, which limits the high-current charge and discharge capacity of lithium-ion batteries; on the other hand, the intercalation of lithium ions...

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Application Information

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IPC IPC(8): C01B31/02
Inventor 力虎林张国庆
Owner LANZHOU UNIVERSITY
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