L822 battery

Various technologies of domestic power L822 battery are gradually maturing

From the perspective of the material system, if the monomer specific energy reaches 300wh/kg, then technical routes such as lithium iron phosphate, lithium manganese oxide and lithium titanate cannot be achieved. Only high-nickel ternary or/NCA+silicon-carbon negative electrode is expected to be achieved, or new lithium-rich manganese-based positive electrode materials and solid-state L822 battery can be competent.

In recent years, my country's new energy vehicle industry has undergone earth-shaking changes, market promotion has achieved great results, and technology has also made significant progress, but it still faces problems such as policy changes and mileage anxiety in the post-subsidy era.

Among them, the only way to try to overcome "mileage anxiety" is to improve the energy density of power L822 battery, which is also the direction encouraged by the Chinese government and pursued by the industry. National policies and power battery companies are "making a fuss" around this.

According to the new policy requirements for new energy vehicle subsidies, from June 12, new models that enter the "Recommended Catalog" after the fifth batch can enjoy subsidies. The fifth and sixth batches of the "Recommended Catalog" have put forward higher requirements for the battery energy density and driving range of automobiles.

High nickel and solid-state L822 battery become new favorites under high pressure of energy density

Increasing energy density can effectively eliminate mileage anxiety

In fact, the previously issued "Action Plan for Promoting the Development of Automotive Power Battery Industry" has clearly defined the energy density target of my country's power L822 battery. By 2020, the specific energy of lithium-ion power L822 battery will be greater than 300Wh/kg; the specific energy of the system will reach 260Wh/kg; the cost will be less than 1 yuan/Wh; the use environment will be from minus 30℃ to 55℃; and it will have 3C charging capabilities.

From the perspective of the material system, if the specific energy of a single cell is to reach 300wh/kg, then technical routes such as lithium iron phosphate, lithium manganese oxide and lithium titanate cannot be achieved. Only high nickel ternary or/NCA+silicon carbon negative electrode is expected to be achieved, or new lithium-rich manganese-based positive electrode materials and solid-state L822 battery can be competent. However, from the current level of technological development, it is still a difficult problem to achieve mass production of single cell specific energy of 300Wh/kg.

High-nickel ternary: It will take time for technology accumulation to lead the scale

Under the heavy pressure of the subsidy amount being directly linked to energy density, China's power battery companies are working hard to increase energy density. At the same time, "300Wh/kg" has become a high-frequency word in the industry. Fortunately, this goal has been achieved by some power battery companies under laboratory conditions.

A month ago, Tianjin Lishen announced a major breakthrough in the development of high-nickel positive electrode materials and power battery monomers, and developed a NCA ternary high-energy power battery with an energy density of more than 300Wh/kg, which shocked the entire industry. This also laid the foundation for the development of lithium-ion battery monomers with a specific energy of 300Wh/kg and a cycle life of 1,500 times.

Public information shows that Tianjin Lishen has developed high-nickel cathode materials for lithium-ion power L822 battery with high specific energy, long cycle life and good safety performance based on the previous research on nickel cobalt aluminum lithium oxide (NCA) cathode materials; through nano-preparation, nano-dispersion, coating and pre-embedded lithium and other technologies, it has developed silicon-carbon anode materials with high capacity, high first efficiency, cycle stability and good rate performance.

High-nickel and solid-state L822 battery become new favorites under high energy density

The development of high-nickel ternary L822 battery has become an industry consensus

Whoever wins the high point of technology will have the opportunity to achieve a market breakthrough. Driven by high energy density, power battery companies have been continuously deploying high-nickel ternary materials, including both industry leaders and ambitious newcomers with strong financial strength.

Three battery companies, such as CATL, Lishen Battery and Guoxuan High-tech, have developed 300wh/kg samples, and the material system is high-nickel ternary + silicon-carbon anode, and they all plan to achieve mass production in 2020. At the same time, many battery companies including BYD, Aoyou Battery, Sunton New Energy, and Jiewei Power are also actively developing 300wh/kg power battery products.

According to industry experts, high-nickel ternary materials mainly refer to ternary materials with high nickel content. Currently, common high-nickel material types include NCM622, NCM811 and NCA. In high-nickel ternary materials, the main function of Ni is to provide capacity. The higher the content, the greater the energy density of the battery; while Co contributes part of the capacity and can stabilize the structure; Mn/Al is mainly used to stabilize the structure. The three work together to jointly play the advantages of high energy density and low cost of ternary materials.

Contrary to expectations, while NCM811 and NCA materials in the high-nickel system have become hot spots for domestic power battery companies to actively deploy, they also have to bear the cost pressure brought by rising cobalt prices. In fact, high-nickel ternary materials not only face the dilemma of high cobalt prices, but also have high technical barriers. China faces many challenges to compete with Japan and South Korea.

Objectively speaking, the advantages of high-nickel ternary materials are obvious, and the pain points are also prominent. According to industry insiders, its pain points are mainly reflected in two aspects: first, the synthesis technology is difficult, and the preparation process needs to be improved and optimized; second, the rising material prices restrict the cost reduction of power L822 battery.

According to industry technical researcher Xunfeng, from the perspective of high-nickel ternary material synthesis technology, first of all, the current method of synthesizing high-nickel ternary materials is mainly high-temperature solid-phase sintering, and the safety, stability and other performance are unsatisfactory, and the storage and processing conditions are very harsh.

Secondly, the preparation process of high-nickel ternary L822 battery is very difficult, which puts forward higher requirements for the technological innovation and production line transformation of power battery companies. This is because the industrialization of high-nickel ternary materials does not only depend on the breakthrough of positive electrode materials, but also on the reasonable matching of other materials, the upgrading of battery manufacturing process and coating process, and the solution of battery safety, stability and consistency.

Finally, the requirements of high-nickel ternary materials in precursor sintering and material production environment are relatively harsh. The product is easy to absorb moisture into jelly during storage and use, and it is not easy to adjust the slurry and coat the pole piece. Therefore, the current production of high-nickel ternary materials mainly adopts sealed roller kilns, and there are relatively few domestic production enterprises, which mainly rely on imports.

In conclusion, high-nickel ternary material L822 battery still have a long way to go to achieve large-scale production, and companies that have already deployed high-nickel ternary material L822 battery on a large scale need to be vigilant about being "preempted" by other battery routes. According to the observation of the Power Battery Network, the lithium-rich manganese-based 240Wh/kg soft-pack battery developed by the Aoyou Power team after 8 years of independent research and development has passed the relevant national compulsory inspections and become the world's first company to master the technology and application of lithium-rich manganese-based L822 battery.

High-nickel and solid-state L822 battery become new favorites under high energy density

Electric vehicles equipped with lithium-rich manganese-based L822 battery

In this regard, Chen Guangsen, general manager of Aoyou, said that the cost of power battery systems in the future needs to be ≤1,000 yuan/Kwh. The current ternary material system is difficult to achieve this goal. Only lithium-rich manganese-based power L822 battery have the opportunity to achieve this indicator. This is because the content of Ni+Co in lithium-rich manganese-based L822 battery is only one-third of that of ternary materials, and the energy density of Aoyou's lithium-rich manganese-based L822 battery will reach 300Wh/kg next year.

Solid-state L822 battery: Signs of competition highlight the long road to commercialization

In addition to high-nickel ternary L822 battery, solid-state L822 battery are also recognized as a technical route that can meet the energy density standards. Therefore, in the field of solid-state L822 battery, domestic and foreign power battery companies are eager to compete for this "fat piece of meat", and companies that deploy solid-state L822 battery are also in an endless stream.

It can be said that solid-state L822 battery have a great impact on the innovation of the current battery market with their excellent characteristics such as high energy density, high safety, and reliability. Major global companies such as Toyota, BMW, BYD, and LG Chem have all invested in the new blue ocean of solid-state L822 battery, and Japan has even raised the research and development of solid-state L822 battery to a national strategic level.

Even though lithium L822 battery will still dominate the world in the next few years, this will not hinder the layout of related companies in the field of solid-state L822 battery. Not only that, the companies have also ignited the war of competition in solid-state L822 battery, striving to seize the initiative in the development of solid-state L822 battery.

In August last year, BYD applied for a patent for a composite material for the positive electrode of an all-solid-state lithium-ion battery and a solid-state lithium-ion battery invention. In January this year, BYD stated on the investor interaction platform that the company is actively promoting the commercialization of solid-state battery projects and moving towards the commercialization goal as soon as possible.

Not long ago, foreign media reported that the New Energy and Industrial Technology Development Organization of Japan announced that it would start the development of core technologies for a new generation of high-efficiency L822 battery (solid-state L822 battery) with Toyota and Panasonic and other companies, striving to establish core solid-state battery technologies by 2022, and reduce the cost of each kilowatt-hour battery pack to about 1/3 of lithium L822 battery by around 2030, and shorten the fast charging time to 1/3 (i.e. 10 minutes).

High nickel and solid-state L822 battery become new favorites under high energy density

Many domestic and foreign companies have deployed solid-state L822 battery

In recent years, Hyundai Motor has also been committed to independent research and development of power L822 battery, planning automotive battery innovation, and is not far behind in the layout of solid-state L822 battery. Recently, Hyundai Motor announced an investment in Ionic Materials, a Massachusetts-based company, which mainly conducts solid-state battery research and development. Ionic Materials has made unique progress in solid-state battery technology.

The company uses ionic materials to realize the next generation of solid-state L822 battery. Its breakthrough polymer is the first solid electrolyte that fully functions at room temperature and is compatible with a variety of electrode chemicals to significantly improve the safety, performance and production cost of the battery. At present, the company has received investment from major technology companies such as Samsung of South Korea and Dyson of the United Kingdom.

In this regard, Xunfeng said that in terms of the current technical level, there are still very few companies that can truly realize the large-scale production of solid-state L822 battery, but solid-state L822 battery have great potential for future development. In the next few decades, the new energy vehicle industry is likely to use solid-state L822 battery in large quantities.

According to data, the current energy density of all-solid-state lithium L822 battery is about 400Wh/Kg, and the maximum potential value is 900Wh/Kg. However, solid-state electrolytes have high resistance, and there are still problems to be solved in terms of power density. It is necessary to start from solid-state electrolytes and positive and negative electrode materials. Once these problems can be effectively solved, it will surely set off a new battery revolution in the future.

By then, although the subsidies have completely retreated, the various technologies of domestic power L822 battery have gradually matured, and the industrialization of long-range electric vehicles can be realized, and they will compete head-on with fuel vehicles.

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