The industry is optimistic about the six new materials for lithium battery packs, which have huge potential in the future. Current lithium battery pack materials have low capacity and cannot meet the growing demand for lithium batteries from terminals. We need new materials or technologies to achieve breakthroughs in lithium battery packs. All activities in lithium battery packs are based on materials, and materials with diversified functions will be needed in the future. Let’s take a look at what new material breakthroughs have unlimited potential in the future?

　　The following lithium battery pack materials have been favored by industry insiders and may become a breakthrough in breaking the barriers of lithium battery packs. The editor will introduce them to you one by one below.

　　1. Lithium titanate

　　In recent years, domestic research and development enthusiasm for lithium titanate has been relatively high.

　　The main advantages of lithium titanate are:

　　It has a long cycle life, is a zero-strain material, and does not generate a SEI film in the traditional sense;

　　It is highly safe, has a high lithium insertion potential, does not generate dendrites, and has extremely high thermal stability during charging and discharging;

　　Can be charged quickly.

　　Disadvantages: The main factor currently limiting the use of lithium titanate is that the price is too high, which is higher than traditional graphite. In addition, the gram capacity of lithium titanate is very low, about 170mAh/g. Only by improving the production process and reducing production costs can the advantages of lithium titanate such as long cycle life and fast charging be brought into play. Combining the market and technology, lithium titanate is more suitable for use in buses and energy storage fields that do not require space.

　　2. Graphene

　　Advantages: Since graphene won the Nobel Prize in 2010, it has attracted global attention, especially in China. There has been an upsurge in research and development of graphene in China, which has many excellent properties, such as good light transmittance, excellent electrical conductivity, high thermal conductivity, and high mechanical strength.

　　As a positive and negative electrode additive, it can improve the stability of lithium battery packs, extend cycle life, and increase internal conductivity.

　　Disadvantages: In view of the immature mass production process, high price and unstable performance of graphene, graphene will be the first to be used as a positive and negative electrode additive in lithium battery packs.

　　3. Silicon-carbon composite anode material

　　Advantages: As a type of future anode material, silicon-carbon composite material has a theoretical gram capacity of about 4200mAh/g, which is more than 10 times higher than the 372mAh/g of graphite anodes. After its industrialization, it will greatly improve the performance of batteries. capacity.

　　Disadvantages: During the charging and discharging process, the volume expansion can reach 300%, which will cause the silicon material particles to be pulverized and cause material capacity loss. At the same time, the liquid absorption capacity is poor. Poor cycle life. At present, the above problems are being solved through nanometerization of silicon powder, silicon carbon coating, doping and other means, and some companies have made certain progress.

　　4. Lithium-rich manganese-based cathode materials

　　High capacity is one of the development directions of lithium battery packs, but the energy density of current cathode materials is 580Wh/kg for lithium iron phosphate and 750Wh/kg for lithium nickel cobalt manganate, both of which are on the low side. The theoretical energy density of lithium-rich manganese-based batteries can reach 900Wh/kg, making it a research and development hotspot.

　　The advantages of lithium-rich manganese-based cathode materials include: high energy density and abundant main raw materials.

　　Disadvantages: The first discharge efficiency is very low, the material evolves oxygen during the cycle, causing safety hazards, the cycle life is poor, and the rate performance is low. But the potential is huge.

　　5. Coating diaphragm

　　The separator is crucial to the safety of lithium battery packs, which requires the separator to have good electrochemical and thermal stability, as well as maintain a high degree of wettability to the electrolyte during repeated charging and discharging.

　　The function of the coated separator is:

　　Improve the thermal shrinkage resistance of the diaphragm to prevent the diaphragm from shrinking and causing large-area short circuits;

　　The coating material has low thermal conductivity, which prevents certain thermal runaway points in the battery from expanding to form overall thermal runaway.

　　6. Carbon nanotubes

　　Carbon nanotubes themselves have excellent conductive properties. At the same time, due to their small depth and short stroke when deintercalating lithium, as a negative electrode material, they have less polarization during high-rate charge and discharge, which can improve the high-rate charge and discharge performance of lithium batteries. Utilize its unique hollow structure, high conductivity and large specific surface area as a carrier to improve the electrical properties of other negative electrode materials.

　　Disadvantages: When carbon nanotubes are directly used as negative electrode materials for lithium battery packs, there will be problems such as high irreversible capacity, voltage lag, and unclear discharge platform.

　　In short, the future market prospects of the above new lithium battery pack materials cannot be underestimated. Industry experts have always been optimistic that they are the most promising new materials for lithium battery packs. Although they still have some disadvantages and shortcomings at present, in the future they will continue to improve and break through themselves to become the most potential new material for lithium battery packs.

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