Research Reagents-Chongqing City's new lithium battery high-efficiency energy-saving preparation technology research breakthrough
Recently, the Chongqing Research Institute of Science and Technology relied on the scientific and technological research project "Research and Development of High-efficiency and Energy-saving Preparation Technology for Cathode Materials of New Lithium-ion Power Batteries", which has developed a high-efficiency and energy-saving preparation technology for the key materials of lithium ion batteries The development of new materials and energy saving and environmental protection industries in Chongqing.
Lithium ion battery is a new generation of green high-energy battery with excellent performance, which has been widely used in 3C products, new energy vehicles and other fields. The cathode material occupies a core position in the lithium battery, its cost accounts for more than 40% of the battery, and directly affects various performance indicators of the lithium battery. Due to the complex preparation process and high energy consumption of lithium battery cathode materials, scientists and technicians have innovated the wet solid phase coordination technology by improving the cathode material precursor mixing process, which reduces the synthesis temperature on the basis of ensuring uniform mixing. At 200 ℃, the firing time is shortened by 2h, the stability is high, the material synthesis efficiency is improved by 25%, and the battery cost is greatly reduced. The carbon-coated lithium vanadium phosphate cathode material prepared by this technology has a reversible discharge capacity of about 150 mAh / g after a 1000-week charge-discharge cycle test at a rate of 0.5C in an electrochemical window of 3.2-4.8V. Reversible capacity retention rate reached 86.7%. At present, the internationally renowned journal Electrochimica Acta has made a special report and has obtained a national invention patent.
The technology has now formed a demonstration line of cathode materials with an annual output of 150 kg, which will bring the dawn of technological innovation and energy saving and consumption reduction for the city's electronics, electric vehicle and other production enterprises. After entering the industrialization, based on the annual cost savings of 1 million yuan for each enterprise, the social and economic benefits will reach hundreds of millions of yuan in the next few years.
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