The 10 most promising lithium battery new materials in the future
Lithium batteries have experienced several rounds of growth and progress, and the current industrial chain is basically complete. Through top 10 lithium battery companies in the world, you can learn more about lithium batteries. At the same time, with the large screen and diversified functions of digital terminal products, new requirements are put forward for batteries. The future of lithium batteries will bring new advances due to the continuous development and research of new materials.
The 10 most promising lithium battery new materials in the future
Silicon carbon composite anode material
As a kind of negative electrode material in the future, 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-based negative electrodes. After its industrialization, it will greatly increase the battery capacity.
Silicon carbon anode material has the advantages of high energy density and suitable discharge platform, and is a potential next-generation lithium battery anode material. With the maturity of the production process and the improvement of the supporting industrial chain, the silicon carbon negative electrode will gradually realize the industrialization.
Lithium titanate battery is a lithium-ion battery, the positive electrode material is lithium titanate (Li₂TiO₃), and the negative electrode material is carbon material. Compared with traditional lithium-ion batteries, lithium titanate batteries have the advantages of higher safety, longer service life and faster charging speed.
At present, compared with lithium iron phosphate batteries and ternary lithium batteries, lithium titanate batteries have higher production costs and a lower market share. In the future, with the continuous improvement of technology level, the development speed of lithium titanate battery industry will be accelerated.
Graphene has many excellent properties, such as good light transmission, excellent electrical conductivity, high thermal conductivity, and high mechanical strength. It can be applied to power battery graphene negative electrode composite materials, lithium battery positive electrode conductive agent and graphene functional coated aluminum foil, etc.
Thereby greatly reducing the weight of the battery and thereby reducing the quality of the vehicle, prolonging the service life of the battery, and greatly improving the cruising range and charging speed of the electric vehicle.
In view of the current immature mass production process of graphene, high price and unstable performance, graphene will be the first to be used as positive and negative electrode additives in lithium-ion batteries.
Carbon nanotubes are a kind of carbon material with a graphitized structure, which has excellent electrical conductivity. At the same time, because of its small depth and short stroke when deintercalating lithium, as a negative electrode material, the polarization effect is small when charging and discharging at a high rate, which can improve High rate charge and discharge performance of the battery.
In the application of lithium batteries, when carbon nanotubes are used as conductive agents, their unique network structure can not only effectively connect more active materials, but also their excellent conductivity can greatly reduce impedance. Therefore, more in-depth research and development of new carbon nanotube conductive agents is the direction of focus in the future.
Lithium-rich manganese-based cathode materials
High capacity is one of the development directions of lithium batteries.
At the moment, the main cathode material is lithium iron phosphate. Top 10 lithium iron phosphate materials companies in China have mastered relatively skilled technologies.
The theoretical energy density of lithium-rich manganese base can reach 900Wh/kg, which has become a research and development hotspot. The lithium-rich manganese-based cathode material has a high discharge specific capacity. Therefore, it can be used to manufacture power batteries with high energy density and improve the endurance of power batteries.
Although the lithium-rich manganese base has obvious advantages in terms of gram capacity and great potential, it will take time for it to be launched in large quantities due to the slow technological progress.
Nickel cobalt lithium manganese oxide material
For a long time, the power battery route has been dominated by lithium iron phosphate, but as Tesla has become popular all over the world, the ternary material route it uses has caused a boom.
Although lithium iron phosphate has high safety, its low energy density cannot be overcome, and new energy vehicles require longer cruising range. Therefore, in the long run, nickel-cobalt lithium manganese oxide ternary materials with higher gram capacity have more opportunities Replacing lithium iron phosphate has become the mainstream material route for the next generation of active power batteries.
boehmite coated diaphragms
Under the trend of power batteries paying more attention to safety performance, boehmite can highlight its advantages as a coating material solution.
The content of high-purity boehmite magnetic foreign matter is lower, which can effectively prevent leakage and short circuit. Secondly, the water absorption rate of boehmite is significantly lower than that of traditional coating materials, which further improves battery safety performance.
With the gradual emergence of boehmite’s performance advantages and the maturity of market application technology, boehmite is expected to become the mainstream material.
Composite copper foil
Battery separator is critical to the safety of lithium batteries. Composite copper foil conforms to the development trend of the industry and is a potential new lithium battery negative electrode current collector material.
The cost of the current electrolytic copper foil process is highly dependent on copper raw materials, greatly affected by copper price fluctuations, and there is a bottleneck in the improvement of battery safety and energy density. Safer, higher energy density, and low cost are the development direction of the industry, which provides innovative space for the industrialization of new composite copper foil materials.
High voltage electrolyte
Improving the energy density of batteries is one of the trends in lithium batteries. At present, there are two main ways to increase energy density: one is to increase the charge cut-off voltage of traditional cathode materials. Another method is to develop new cathode materials with higher charging and discharging platforms, such as lithium-rich manganese base, lithium nickel cobalt oxide, etc.
After the voltage of the positive electrode material is increased, a matching high-voltage electrolyte is required. Therefore, the research on high-voltage electrolyte is getting more and more in-depth. At present, new high-voltage electrolytes include sulfones, nitriles, ionic liquids, and fluorinated electrolytes. These new electrolytes can meet the high-voltage requirements to a certain extent.
Binder is one of the important constituent materials of lithium-ion battery pole pieces. It has the function of enhancing the contact between active materials, conductive agents and current collectors, and stabilizing the structure of pole pieces. It is an additional material with high technical content in lithium-ion battery materials.
At present, theoretical research is relatively abundant, but the progress in industrialization needs to be further improved. Some new binders have been put into industrialization. The improvement of the performance of more functional adhesive products, the research and development and industrial application of new materials will be the key development direction of this field in the future.