From：CTECHI GROUP Limited Release time：2018-12-06
Overview：Recently, the project "Research on Synthesis Technology of submicron lithium titanate battery materials" undertaken by China Electric Power Research Institute has passed the acceptance of State Grid Corporation. The project solved the problem of gas expansion of lithium titanate batteries by studying the synthesis of submicron lithium titanate materials and doping modification technology.
Recently, the project "Research on Synthesis Technology of submicron lithium titanate battery materials" undertaken by China Electric Power Research Institute has passed the acceptance of State Grid Corporation. The project solved the problem of gas expansion of lithium titanate batteries by studying the synthesis of submicron lithium titanate materials and doping modification technology.
As the most promising energy storage battery, lithium-ion battery has great potential in large-scale energy storage market. With the development of technology and the decrease of manufacturing cost, lithium titanate battery will become the mainstream lithium ion battery system for large-scale energy storage applications.
However, the gas generated from the decomposition of titanium ion catalytic electrolyte on the surface of lithium titanate material will cause the expansion rate of lithium titanate battery to be about 25%, while the battery expansion will shorten the battery life and affect the application safety. To realize the large-scale application of lithium titanate batteries, this key problem must be solved.
The Chinese Academy of Electrical Sciences started with lithium titanate materials and took submicron lithium titanate materials as the research object. Element doping technology was used to modify lithium titanate materials to reduce its surface catalytic activity and inhibit the side reaction of gas expansion, so as to achieve the purpose of inhibiting battery gas expansion.
The project carries out research on different synthesis technologies of submicron lithium titanate materials, develops solid-state synthesis methods of raw material pretreatment and electrospinning synthesis methods of submicron lithium titanate materials, studies the modification technology of submicron lithium titanate materials, develops doping modification and surface coating technology of submicron lithium titanate materials, and solves the problems caused by the application of submicron lithium The gas expansion of lithium titanate batteries caused by the catalytic activity of tetravalent titanium ions on the surface of lithium titanate materials.
The 15-ampere-hour lithium titanate battery based on modified submicron lithium titanate material has been manufactured by the project, and the life of the battery can reach 15418 times by authoritative prediction. In the environment of 55 degrees Celsius, after 1000 cycles under 30 ampere charging and discharging current, its inflation rate is only 11.2%, which improves the safety of the battery and promotes the energy storage led by the State Grid Corporation. Technology industrialization and practicality.
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