What are the differences between lithium titanate batteries and lithium iron phosphate?

Comparative analysis of lithium titanate battery and lithium iron phosphate. Taking lithium iron phosphate-graphene and ternary-lithium titanate as examples, lithium titanate batteries are at a disadvantage in terms of energy density alone. The Northeast Securities Research Report pointed out that the current specific energy of lithium iron phosphate batteries is 100-120Wh/kg, among which the nickel-cobalt-aluminum ternary battery used by Tesla reaches 252Wh/kg, while the Yinlong lithium titanate battery is only 90Wh/kg. kg, only half of some graphite anode material batteries. From the perspective of cost, lithium titanate batteries have no advantages. Currently, Yinlong lithium titanate battery raw materials include titanium hydroxide and lithium hydroxide, and their prices are higher than graphite anode materials. According to the research results of my country's battery network, the current cost of lithium iron phosphate and ternary batteries is 1100 yuan/kwh-1200 yuan/kwh, while the cost of lithium titanate batteries is about 2-3 times that of ternary batteries. The energy density is twice as low and the cost is 2-3 times higher. How can lithium titanate batteries participate in market competition? Obviously, it is its own unique advantages that have moved some people in the industry. The safety of lithium titanate batteries is unique. When lithium titanate is used as an anode material, the potential platform is as high as 1.55V, which is more than 1V higher than traditional graphite anode materials. Although some energy density is lost, it also means that the battery is safer. Technical expert Lu Languang once said that the negative electrode voltage requirement is relatively low when the battery is charged quickly, but if it is too low, the lithium battery will easily precipitate very active metallic lithium. This lithium ion not only conducts electricity, but also reacts with the electrolyte. Heat is released and flammable gas appears, causing a fire. Because of the higher voltage of 1V, lithium titanate prevents the negative electrode voltage from being zero, which indirectly prevents the precipitation of lithium ions, thereby ensuring the safety of the battery. Since the lithium titanate battery can be used safely in both high and low temperature environments, it also reflects its important advantages of wide temperature resistance (especially low temperature resistance). At present, the safe working temperature range of Yinlong lithium titanate battery is between -50°C and 65°C, while the energy of ordinary graphite negative electrode battery starts to decay when the temperature is lower than -20°C, and the charging capacity is only at -30°C. 14% of the total charging capacity cannot work at all in severe cold weather. Comparison and analysis of lithium titanate battery and lithium iron phosphate. In addition, because lithium titanate battery has only 1% volume change even if it is overcharged, it is called a zero-strain material, which makes it have an extremely long life. Yinlong's chairman Wei Yincang once said that Yinlong's lithium titanate battery has a lifespan of up to 30 years, which is equivalent to the life of a car, while the average life of ordinary graphite anode material batteries is only 3-4 years. From the perspective of the full life cycle, the cost of lithium titanate batteries is lower. The last advantage of lithium titanate is its fast charge-discharge capability and high charge rate. At present, the charging rate of Yinlong lithium titanate batteries is 10C or even 20C, while the battery charging rate of ordinary graphite anode materials is only 2C-4C. Based on these technical characteristics of lithium titanate batteries, the industry believes that it meets the needs of new energy buses and large-scale energy storage equipment. Take a bus as an example. Generally, the mileage of a single trip does not exceed 40 kilometers, and it takes at least a few minutes for each terminal to wait until the next departure. At this time, the disadvantage of low energy density of lithium titanate batteries will not affect the use of passenger cars, but instead reflects the benefits of fast charging of batteries. As a means of public transportation, buses have put forward higher requirements on the safety and durability of batteries. Six new energy buses equipped with lithium titanate batteries have entered the Ministry of Industry and Information Technology's 'Recommended Models for the Promotion and Application of New Energy Vehicles' (the fourth batch of 2017), which means that the official recognition of the maturity of this battery technology. With the implementation of subsidies in the later stage, the price of lithium titanate electric buses will also drop, which is expected to continue to drive its sales in the future. Facing the huge new energy passenger car market, the lithium titanate company began to expand production. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: How is the lithium battery charged?