Domestic companies have done quite well in areas with low technological content. Shenzhen Beitui New Energy Materials Co., Ltd. and Shanghai Shanshan Technology Co., Ltd. have become world-class companies. Among them, Shenzhen Betray market share has ranked second in the world. Customers include more than 130 manufacturers including Panasonic, Samsung, Hitachi and BYD.
However, although graphite anode materials have been successfully commercialized, there are always some insurmountable weaknesses due to carbon as a negative electrode, and it is sure to be replaced by non-carbon materials in the future. Because graphite forms a passivation film in the electrolyte, the film can transfer lithium ions, but it causes energy loss. Moreover, when the battery is overcharged, metallic lithium is precipitated on the surface of the graphite negative electrode to cause a short circuit of the battery. As the temperature increases, the graphite negative electrode in the lithium intercalation state will first undergo an exothermic reaction with the electrolyte, which may generate flammable gas and cause combustion. Therefore, graphite is not the most ideal anode material. Finding a non-carbon anode material with better performance is an important issue in lithium ion battery research.
Although various non-carbon anode materials have been extensively studied in recent years, especially in recent years, nanostructured non-carbon anode materials such as tin composite oxides, titanium oxide compounds and titanate compounds have attracted the attention of many lithium battery workers. However, there are still many problems with these materials that have not been solved, and they still cannot be applied in large quantities. They also require continuous improvement of production routes and processes.
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