Beijing Daily Client | Reporter Bai Bo Correspondent Zhang Hua
In response to the current new energy market's demand for higher energy density and lower cost lithium-ion battery , professors Chen Yanan, Hu Wenbin, and Xu Yunhua from Tianjin University have discovered a high-temperature thermal shock strategy that can synthesize positive electrode materials in a few seconds. This discovery opens up new ways for the efficient synthesis of high-performance, low-cost positive electrode materials. The research results were published in the international journal " Advanced Materials ".
lithium-ion battery has been widely used in electronic products, electric vehicle and large-scale energy storage systems. The performance and price of the cathode material are crucial to lithium-ion batteries. The commonly used positive electrode material synthesis method is currently low in temperature increase rate, which not only consumes high energy but also takes a long time, and often takes several hours or even dozens of hours.
Chen Yanan, Hu Wenbin, and Xu Yunhua's team used the high-temperature thermal shock strategy to synthesize several typical positive electrode materials such as lithium manganese oxide , lithium cobalt oxide , lithium iron phosphate , etc. Compared with the traditional cathode material synthesis method, the high-temperature thermal shock strategy achieves an ultra-high temperature increase rate of 10,000℃ per minute, and the cathode material can be synthesized within a few seconds. The
high-temperature thermal shock strategy also forms oxygen vacancies and small particles during the reaction process, so that the newly synthesized cathode material exhibits excellent battery performance. Taking the lithium cobalt oxide positive electrode material synthesized using high-temperature thermal shock technology as an example, after 300 cycles of battery charge and discharge, the energy density stability of 84.6% was still demonstrated. This material also shows excellent fast charging performance, which can fully charge your phone or tablet in just a few minutes.
As a general method, this high-temperature thermal shock technology can realize the efficient manufacturing of a series of high-performance lithium-ion battery cathode materials, which has the characteristics of extremely short time, low energy consumption, and easy to scale, as well as high industrial value, cost advantages and market potential. The synthesis of lithium-ion positive electrode material with high efficiency and low energy consumption is also expected to contribute to my country's energy conservation, emission reduction and carbon neutrality.
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-