
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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