Lithium titanate battery technology
Use low-cost submicron lithium titanate materials to replace nano-lithium titanate materials, and build a lithium titanate ion battery material system for energy storage based on this. Lithium titanate battery has the advantages of small size, light weight, high energy density, good sealing performance, no leakage, no memory effect, low self-discharge rate, rapid charge and discharge, long cycle life, wide working environment temperature range, safe and stable green Environmental protection and other characteristics.
The competition of lithium titanate battery technology in various energy storage batteries in our country should occupy the advantages of time, location and people. In terms of service life, the ultra-long cycle life of lithium titanate batteries is far better than that of various lead-acid batteries; its efficiency, cost and electrochemical performance are even better than those of sodium-sulfur and flow vanadium battery systems.
The applicable market for lithium titanate battery technology is hybrid electric vehicles, special industrial applications and energy storage applications such as frequency modulation and grid voltage support. These markets are still in their infancy in the world, and it is not yet known who is the leader. Lithium titanate technology is expected to become a leader in these markets.
Compared with the graphite materials commonly used in traditional lithium-ion batteries, lithium titanate materials hardly shrink or expand during the process of charging and discharging lithium insertion and removal. They are called zero-strain materials, which prevent the removal/intercalation of general electrode materials. The problem of damage to the electrode structure caused by the volume strain of the unit cell in the case of lithium ions, which has very excellent cycle performance.
The important problem faced by lithium titanate batteries in large-scale use is cost. At the beginning of project development, the price is 46 times that of lithium iron phosphate batteries. The price of lithium titanate battery remains high. Although its performance is significantly better than that of existing
Lithium Ion Batteries, economic factors greatly limit the market promotion of lithium titanate batteries.
The road ahead for lithium titanate batteries will still be bumpy, but the direction is always going forward. The efforts made by industry companies and research institutions on the development of lithium titanate battery technology will promote the continuous development of lithium titanate batteries.
The use of lithium titanate battery
Energy Storage System Energy storage is considered to be the next frontier of new energy, and people have high expectations for the use of lithium titanate batteries in the field of energy storage. Lithium titanate battery has long cycle life, outstanding safety, excellent power characteristics and good economy. These characteristics will be the key cornerstones of the large-scale lithium energy storage system industry that is currently emerging.
The development of energy storage technology is one of the key core technologies to promote new energy generation and improve the security and stability of the power grid. Among various types of electrochemical energy storage technologies, lithium titanate batteries have the characteristics of long cycle life and good safety performance, which are well suited to the use scenarios of grid energy storage.
Taking the on-board energy storage system of rail transit vehicles as the object, the performance of the on-board energy storage components such as supercapacitors, high-energy capacitors and lithium-ion batteries currently used in rail transit vehicles is compared and decomposed, and it is concluded that lithium titanate batteries have high power. Technical characteristics of high density, high energy density and high reliability. Combined with the research on the performance characteristics and control strategies of lithium titanate batteries, through the comparison of project use cases and field experiments, the technical advantages and broad prospects of large-scale use of lithium titanate batteries in subway vehicle energy storage systems are shown.
In response to the demand for energy storage, based on the original lithium titanate battery, the principles and technical methods for restructuring the lithium titanate battery material system to meet the demand for energy storage were proposed, and sub-micron lithium titanate materials were developed. The lithium titanate battery for energy storage developed by the project maintains the inherent characteristics of long life and high rate, and the cost is greatly reduced.
Lithium titanate battery energy storage technology provides technology accumulation for the construction of large-scale long-life lithium-ion battery energy storage systems, and at the same time lays a technical foundation for the industrialization of long-life lithium-ion battery energy storage devices and promotes the use of new energy.
