What is the future prospect of silicon carbon materials?

The lithium-ion battery has been developed for more than fifteen years. As battery technology continues to improve and battery performance requirements continue to increase, the graphite-based anode materials currently used in the market have reached the bottleneck for the increase of energy density of lithium-ion batteries. The lithium storage capacity of the negative electrode material has reached the limit, and it is difficult to achieve the space.

In the continuous improvement of the market and the continuous improvement of battery energy density requirements by terminal enterprises, a silicon-based anode material with a gram capacity of up to 3500 mah / g or more has appeared in the market. Compared with graphite anode materials, the theory of silicon anode materials The energy density is more than 10 times higher. In order to increase the energy density of the battery as much as possible in the national policy on the battery energy density, many domestic enterprises have begun to increase the research and application of silicon-based anode materials. It is expected that in the context of the rapid development of power batteries, more companies with an annual production capacity of 1,000 tons of silicon-carbon anode materials will appear in the next two years.

According to survey statistics, in 2017, the output of China's lithium battery silicon-carbon anode material has exceeded 1,500 tons, an increase of more than 130% year-on-year, of which the market share of the top five enterprises accounted for more than 90%. However, from the current overall market output, it is still relatively small, accounting for only 1.% of the total output of lithium battery anode materials in the year. The entire lithium-silicon material industry is still in a period of active construction. In general, silicon-carbon anode materials started late in China, and they are relatively backward in foreign countries in technology and product application. At present, most domestic battery companies and materials companies are in the experimental stage, and only a small number of enterprises enter. In the small-scale trial production phase, but in the future, with the national policy on the energy density of the power battery, the battery energy density is required to reach 300 Wh / kg by 2020.

Policy promotion will further promote the rapid development of new energy power batteries. As a high-rate, high-energy new material, silicon-carbon materials are the most preferred materials for industrialization, and silicon-carbon materials are also the most commercial high-energy. Density new anode materials will also usher in a big explosion in the next two to three years, and the industry has broad prospects.

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