Hard carbon material and preparation method thereof

Abstract

The invention discloses a hard carbon material and a preparation method thereof. A natural component is used as a raw material, and through raw material primary calcination, coarse pulverization, special Binchotan coating carbonization, fine pulverization and classification, the best carbonization effect is obtained. The hard carbon is rich in amorphous microporous structures. Compared with the prior art, the preparation method has simple processes, a high yield, a low cost and a good large-scale application potential. The raw materials used in preparation are environmentally friendly. The electrochemical properties of the prepared hard carbon are obviously improved. The hard carbon material can be used in the preparation of lithium ion batteries, has good cycling and fast chargeability and excellent charge and discharge performances and is especially suitable for power batteries for electric vehicles with high power density and high energy density.

Description

technical field

[0001] The invention relates to a hard carbon material and a preparation method thereof, belonging to the technical field of lithium ion batteries. Background technique

[0002] With the development of science and technology and the improvement of living standards, human beings have an increasing demand for multifunctional portable electronic devices and electric vehicles. Therefore, research on high energy density, good load characteristics, fast charging and discharging, high safety performance, long cycle life, Low-cost new lithium-ion batteries have become an important frontier field in the world.

[0003] At present, carbon-based anode materials are selected as anode materials for lithium-ion batteries because of their low cost and electrochemical lithium intercalation hosts. Graphite material has the advantages of low electrode potential, long cycle life, good safety and low price, and has become the main negative electrode material for commercial lith...

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