The four most promising lithium-ion battery materials in the future

The four most promising lithium-ion battery materials in the future my country’s energy storage network: the development of lithium-ion batteries is in a bottleneck period, and the energy density is close to the physical limit. We need new materials or new technologies to achieve breakthroughs in lithium-ion batteries. The following battery materials have always been favored by the industry, and may become a breakthrough in breaking through the barriers of lithium-ion batteries. The digital terminal products behind the large screen of silicon-carbon composite anode material have diversified functions and put forward new requirements for battery life. At present, the capacity of lithium-ion battery materials is relatively low, which cannot meet the ever-increasing demand for terminal batteries. As the future cathode material, silicon-carbon composite material has a theoretical gram capacity of more than 4200mAh/g, which is 10 times more than the 372mAh/g of graphite cathode. After industrial treatment, it will greatly increase the capacity of the battery. The important problems of silicon-carbon composite materials are: in the process of charging and discharging, the volume can expand to 300%, leading to silicidation of silicon particles and loss of material capacity. At the same time, the suction power is poor. Poor cycle life. At present, the above-mentioned problems have been solved through nano-silicon powder, silicon-carbon coating, doping and other means, and some companies have made certain progress. Related Ru0026D companies: At present, various material manufacturers are developing silicon-carbon composite materials, such as BTR, Snowflake, Star City Graphite, Huzhou Chuangya, Shanghai Shanshan, Huawei, Samsung, etc. The research and development of silicon-based materials by domestic anode material companies is as follows: Most material suppliers are still in the research and development stage, and only Shanghai Shanshan has entered the trial production stage. 2 Lithium titanate In recent years, domestic research and development of lithium titanate have been relatively active. Lithium titanate has the following advantages: long cycle life (up to 10,000 times or more), is a zero-strain material (volume change is less than 1%), does not appear in the traditional sense of SEI film; high safety. Intercalated lithium has the advantages of high potential, no dendrites, and good thermal stability during charge and discharge. Can be charged quickly. At present, an important factor restricting the use of lithium titanate is the high price, which is higher than that of traditional graphite, and the low gram capacity of lithium titanate, which is about 170mAh/g. Only by improving the production process and reducing production costs can the advantages of long cycle life and fast charging of lithium titanate be brought into play. Combining the market and technology, lithium titanate is more suitable for public transportation and energy storage fields without space requirements. Related Ru0026D companies: Zhuhai Yinlong, Sichuan Xingneng, Huzhou Weihong Power Co., Ltd., Shenzhen Beiterui New Energy Materials Co., Ltd., Hunan Shanshan New Materials Co., Ltd. and many smaller lithium titanate producers Anhui and surrounding Shenzhen. 3 Since graphene won the Nobel Prize in 2010, graphene has received worldwide attention, especially in my country. Graphene has excellent properties such as good light transmittance, good electrical conductivity, high thermal conductivity, high mechanical strength, etc., which has set off an upsurge of domestic graphene research and development. The potential applications of graphene in lithium-ion batteries include: as a cathode material. Graphene has a high g-capacity, with a reversible capacity of about 700mAh/g, which is higher than that of the graphite anode. In addition, the good thermal conductivity of graphene ensures its stability in the battery system. The spacing between the graphene sheets is greater than the spacing between the graphene sheets, so that the diffusion of lithium ions between the graphene sheets is smooth, which is beneficial to improve the power performance of the battery. Due to the immature production technology of graphene and the unstable structure, graphene as a negative electrode material still has some problems, such as low primary discharge efficiency (about 65%). Poor bicycle performance; higher price, significantly higher than traditional graphite cathodes. As a positive and negative additive, lithium-ion batteries can improve battery stability, extend cycle life, and increase internal conductivity. Because the mass production process of graphene is immature, expensive, and unstable, graphene will be the first material used as a positive electrode and negative electrode additive for lithium-ion batteries. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: What are the characteristics of the micro printer lithium-ion battery?