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release time:2022-11-26
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1、 Advantages and disadvantages of lithium iron phosphate battery and ternary Li battery
1. For the current energy storage battery, ternary lithium ion battery is better, because lithium iron phosphate battery has reached the peak of technology, while ternary lithium ion battery is still in development, and ternary lithium ion battery may exceed lithium iron phosphate in the future.
2. Lithium iron phosphate battery is a lithium ion battery with lithium iron phosphate as cathode material. It is characterized by no cobalt and other valuable elements, low raw material prices, rich phosphorus and iron on the earth, and no supply problems. The working voltage is moderate (3.2V), the capacitance per unit weight is large (170mAh g), the discharge power is high, the charging speed is fast, the cycle life is long, and the stability is high in high temperature and heat environment.
3. Compared with lithium cobalt oxide and lithium manganate batteries commonly seen in the market, lithium iron phosphate batteries have at least the following five advantages: higher safety, longer service life, no heavy metals and rare metals (low raw material cost), support for rapid charging and wide operating temperature range.
4. The disadvantage is that lithium iron phosphate has some performance defects, such as low tap density and compaction density, resulting in low energy density of lithium ion battery; High material preparation cost, high battery manufacturing cost, low battery yield and poor consistency; Poor product consistency.
2、 Market forecast of lithium iron phosphate battery and Sanyuanli battery in the future
1. The performance of ternary battery depends on the performance of high nickel battery. The inflection point of mass production of high nickel power lithium batteries has come, and high nickel is the development trend of medium cycle industry. In order to achieve the energy density target of 300whkg by 2020, high nickel ternary positive electrode+silicon carbon negative electrode is the most feasible commercial method, and the high nickel trend of positive electrode is obvious. However, there are still some uncertainties after 2025. It is necessary to track the commercialization process of lithium rich manganese base and solid state batteries. Therefore, the life cycle of high nickel ternary cathode products is expected to be at least 5-10 years.
2. At present, cylindrical power lithium battery has taken the lead in mass production of high nickel products. The breakthrough of square and flexible packaging batteries is imminent. In 2019, the industry will usher in a general breakthrough in large-scale production of high nickel products. It is estimated that the market size of ncm811 cathode will exceed 20 billion in 2020. The technical threshold of high nickel cathode is greatly improved, which will reshape the industrial pattern. The cycle performance and thermal stability of high nickel cathode are poor. Only by doping and coating material modification can it be applied in practical industrialization. Its core technology is doping coating process.
3. At the same time, the sintering equipment precision and process requirements have also been greatly improved, the technical difficulty has increased significantly, and the technical threshold of high nickel cathode has been greatly improved, which will reshape the industrial pattern, and the market concentration is expected to increase, so as to change the current decentralized situation. The amount of cobalt used for high nickel positive electrode is reduced, the cost is significantly reduced, the premium is significant, and the profitability is significantly improved. In the high nickel positive electrode system, the technical content of the positive electrode sintering link is also significantly improved. Under the processing fee pricing mode, the gross profit margin of the high nickel positive link will also be higher than the stable gross profit margin of the current 523 product.
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