Lithium titanate battery is the battery with the longest life and the highest safety among lithium batteries. In terms of life cycle, ordinary lithium-ion batteries are about 1,000-2,000 cycles, and lithium titanate is 10,000-20,000 cycles. Yinlong advertised that it has mastered the world's leading lithium titanate core technology, achieving 6-minute fast charging and 30-year cycle life.

　　Not long ago, Aunt Dong resigned as chairman of Gree Group, but the private placement failed, and the acquisition of Yinlong was also rejected by minority shareholders.

　　Aunt Dong didn't stop there. At the "Made in China Summit Forum" a few days ago, Dong Mingzhu announced that her personal contribution will join Wanda Group, JD Group, and CIMC Group to invest in Zhuhai Yinlong to deploy new energy development.

　　In the field of new energy, Zhuhai Yinlong is not a giant-level company, and its orders have been questioned by the industry. So why is Yinlong so popular with the bigwigs that Aunt Dong still doesn't give up after a setback? Is it worth it?

　　One, what kind of technology is Yinlong's lithium titanate?

　　According to Yinlong's own statement, the lithium titanate battery is the battery with the longest life and the highest safety among lithium batteries. In terms of life cycle, ordinary lithium-ion batteries are about 1,000-2,000 cycles, and lithium titanate is 10,000-20,000 cycles. Yinlong advertised that it has mastered the world's leading lithium titanate core technology, achieving 6-minute fast charging and 30-year cycle life.

　　This statement is basically an advertisement. The fact is that lithium titanate is a route for people to explore lithium batteries.

　　Ordinary lithium batteries use lithium-containing materials as the positive electrode and graphite as the negative electrode. However, the voltage of lithium titanate is too low, and the capacity is too miserable if lithium titanate is used as the positive stage. Therefore, the usual practice is to use lithium titanate as the negative electrode, and another lithium-containing material as the positive electrode.

　　The so-called long cycle life of lithium titanate is a false proposition, because the battery does not have a long life of the negative electrode and can be used in one battery, and the life of the positive electrode must be long. The life of the positive electrode of a lithium battery depends on the positive electrode material.

　　Among the three commonly used materials, lithium cobalt oxide, ternary material, and lithium iron phosphate, lithium iron phosphate has the longest life. Therefore, lithium titanate is usually matched with lithium iron phosphate to make a battery.

　　The battery capacity of the lithium iron phosphate cathode and the graphite anode is not large, but the capacity of the anode is even lower when changing to lithium titanate.

　　Therefore, the energy density of lithium titanate batteries is relatively low among lithium batteries, which is its fatal flaw.

　　In addition, lithium titanate will react with the electrolyte, and gas will be generated after a certain number of times, and the actual life is not long. So although Panasonic did this thing very early, it has not been developed.

　　Yinlong’s work is to use graphene doping coating technology to effectively inhibit the gas production reaction at the interface between lithium titanate and the electrolyte, which avoids the occurrence of "flatulence" phenomenon, and the life is really long.　　The lithium iron phosphate of the positive electrode is originally a long-life material, and the problem of flatulence of the lithium titanate of the negative electrode is solved. Yinlong's lithium titanate life problem has been solved.

　　As for the problem of poor performance and low energy density, this cannot be solved. It is used in a family car, and it needs to be charged once every day, and no one can bear it.

　　However, Yinlong Group uses long life and fast charging characteristics to find a suitable market for lithium titanate-buses.

　　The bus is large and has low energy density. It is nothing more than a few hundred kilograms of batteries. Moreover, the charging is fast, and the battery can be quickly recharged between the departure of the bus. It can quickly recharge the electricity and has a long life, which is not possible with other solutions.

　　In addition, lithium titanate has additional small advantages. First, the low temperature performance is better than other batteries. The second is that the negative electrode is not graphite, and the probability of lithium metal crystals piercing the diaphragm is small and safer.