The main types of anode materials for lithium batteries are natural graphite (59%), artificial graphite (30%), mesophase carbon microspheres (8%) and other types (3%). Graphite anode materials still occupy the mainstream position of lithium battery anode materials, but in recent years the development and application of new anode materials (such as lithium titanate, graphene, etc.) have also begun to attract industry attention.
Graphene is a new type of material, and its founding researchers won the 2010 Nobel Prize in Chemistry. The application of graphene to the anode material of lithium ion batteries can greatly improve the capacity and charge-discharge performance of the anode material.
Domestic universities and research institutes such as Beijing University of Chemical Technology have conducted research work on graphene materials. Enterprises have also begun to promote the industrialization of graphene anode materials. In November 2011, Changzhou Sixth Element Material Technology Co., Ltd. was established, which will produce graphene for lithium battery anode materials, and plans to increase production to ton-level in 2012. In April 2012, Dalian Lichang New Materials Co., Ltd. built a fully automated graphene anode material production line with an annual production capacity of 300 tons.
Graphene specific surface area test uses 3H-2000 series specific surface area tester to test, and 3H-2000 specific surface area tester tests graphene and other negative electrode materials, with high test accuracy and good repeatability, and has obtained 10 technical patents, graphene specific surface area The well-known domestic tester brand is exported to overseas.
Graphene preparation method
There are two main methods for synthesizing graphene: mechanical methods and chemical methods. Mechanical methods include micromechanical separation method, orientation epitaxial method and heating SiC method; chemical methods are chemical reduction method and chemical cleavage method.
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