Briefly describe the current status and advantages and disadvantages of LR1130 battery technology development

Detailed explanation of the current status and advantages and disadvantages of LR1130 battery technology development. Developing energy storage technology is one of the key core technologies to promote new energy power generation and improve the safety and stability of the power grid. LR1130 battery is one of the most promising energy storage batteries. It has the characteristics of long cycle life and good safety performance, which is well suited to the application scenario of power grid energy storage. Current status of LR1130 battery technology development LR1130 battery has a three-dimensional lithium ion diffusion channel unique to the spinel structure, and has the advantages of excellent power characteristics and high and low temperature performance. Compared with carbon negative electrode materials, lithium titanate has a high potential, which results in the solid-liquid layer (SEI) that usually grows on the surface of the electrolyte and the carbon negative electrode basically not forming on the surface of lithium titanate. More importantly, lithium dendrites are difficult to form on the surface of lithium titanate within the voltage range used by normal batteries. This largely eliminates the possibility of short circuits formed by lithium dendrites inside the battery. Therefore, the safety of lithium-ion batteries with lithium titanate as the negative electrode is the highest among all types of lithium batteries that the author has seen so far. In the past 10 years, the research on LR1130 battery technology at home and abroad has been surging. Its industrial chain can be divided into the preparation of lithium titanate materials, the production of lithium titanate batteries, the integration of LR1130 battery systems and their applications in electric vehicles and energy storage markets. There are not many manufacturers in the world that can mass-produce lithium titanate batteries, mainly represented by the American Aoti Nanotechnology Company and the Japanese Toshiba Group. The application markets of lithium titanate batteries mainly include electric vehicles (buses, rail transit, etc.), energy storage markets (frequency modulation, power grid quality, wind farms, etc.) and industrial applications. The new lithium-ion battery with lithium titanate as the negative electrode has broken through the inherent limitations of graphite as the negative electrode, and its performance is significantly better than that of traditional lithium-ion batteries, becoming one of the most promising energy storage batteries. The main problem faced by lithium titanate batteries in large-scale applications is the cost issue. At the beginning of the project development, its price was 4-6 times that of lithium iron phosphate batteries. Although the performance is significantly better than that of existing lithium-ion batteries, economic factors have greatly restricted the market promotion of lithium titanate batteries. Therefore, in order to achieve large-scale energy storage applications, lithium titanate batteries need to be reconstructed on the basis of existing lithium titanate batteries for electric vehicles, including technical reconstruction of material systems, battery design, production processes, etc., to ensure the long life of lithium titanate batteries while significantly reducing costs. Four major advantages of lithium titanate batteries 1. Good safety and stability Due to the high lithium embedding potential of lithium titanate negative electrode materials, the generation and precipitation of metallic lithium is avoided during the charging process. Because its equilibrium potential is higher than the reduction potential of most electrolyte solvents, it does not react with the electrolyte and does not form a solid-liquid interface passivation film, which avoids the occurrence of many side reactions, thereby greatly improving safety. "Energy storage power stations are the same as electric vehicles. Safety and stability are the most important indicators." Yang Kai said. 2. Excellent fast charging performance The long charging time has always been an obstacle that is difficult to overcome in the development of electric vehicles. Generally, pure electric buses that use slow charging take at least 4 hours to charge, and many pure electric passenger cars take up to 8 hours to charge. Lithium titanate batteries can be fully charged in about ten minutes, which is a qualitative leap compared to traditional batteries. 3. Long cycle life Compared with the graphite material commonly used in traditional lithium-ion batteries, the skeleton structure of lithium titanate materials hardly shrinks or expands during the process of charging and discharging lithium insertion and extraction. It is called "zero strain" material, which avoids the problem of electrode structure damage caused by cell volume strain when general electrode materials extract/insert lithium ions, and thus has very excellent cycle performance. According to experimental data, the average cycle life of ordinary lithium iron phosphate batteries is 4000-6000 times, while the cycle life of lithium titanate batteries can reach more than 25,000 times. 4. Good wide temperature resistance Generally, electric vehicles will have problems charging and discharging at -10℃. Lithium titanate batteries have good wide temperature resistance and strong durability. They can be charged and discharged normally at -40℃ to 70℃. Whether in the frozen north or in the hot south, the vehicle will not be affected by battery "shock" and work, eliminating the user's worries. Disadvantages of lithium titanate batteries 1. High potential for lithium, resulting in low working voltage and reduced energy density 2. Gas is easily produced during the battery manufacturing process 3. Poor electronic conductivity Why has LR1130 battery not become a mainstream battery? Lithium titanate material is used as a negative electrode material in the battery. Due to its own characteristics, the material and the electrolyte are prone to interact and produce gas precipitation during the charge and discharge cycle reaction. Therefore, ordinary lithium titanate batteries are prone to flatulence, resulting in bulging of the battery cell, and the electrical performance will also be greatly reduced, greatly reducing the theoretical cycle life of lithium titanate batteries. Test data shows that ordinary lithium titanate batteries will experience flatulence after about 1500-2000 cycles, resulting in inability to use normally, which is also an important reason restricting the large-scale application of lithium titanate batteries. Lithium titanate batteries have low energy density. In order to store the same amount of energy, the volume must increase, and the corresponding diaphragm, copper foil, aluminum foil, and electrolyte will also increase comprehensively. In addition, titanium itself is a precious metal, and it is difficult to break through the cost control bottleneck. The manufacturing cost is too high. The energy storage technology of lithium titanate batteries has been piloted in Japan for a long time. The price difference of Japan's tiered electricity price is 1.6 yuan per kWh, while it is only 70 or 80 cents in China. Compared with the cost, it is not cost-effective at all, so it is difficult to promote. The above is an introduction to the development status and advantages and disadvantages of lithium titanate batteries. The energy density of lithium titanate batteries is relatively low, and they will not be too mainstream in the future.

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