On the 23rd, cooperation between the experts of China and Singapore, to achieve breakthroughs in the research and development, design and electrochemical performance improvement of lithium-sulfur battery cathode materials. After the original use of new technologies, lithium-sulfur batteries that were not used more than 300 times were repeatedly used. The life cycle can be increased to 800 times and the life can be increased to at least 600 kilometers.
The research was jointly conducted by the Institute of Advanced Materials (IAM) innovation led by Huang Shi, academician of the Chinese Academy of Sciences and the president of Nanjing University of Technology, and Professor Yu Yu of the Nanyang Technological University in Singapore. The ultra-thin transition metal hydroxide materials with a single layer thickness of about 7 nanometers (1 nanometer is equivalent to 1/600,000 of a hair filament diameter) were used to micro-encapsulate the sulfur-carbon black composite nano-units.
It is understood that this ultra-thin transition metal hydroxide nanomaterial can undergo irreversible reaction with lithium ions, and the resulting inert material can function as an electrode protective layer, overcoming the conventional lithium-sulfur battery electrode caused by polysulfide dissolution. Low charge and discharge efficiency, short cycle time, low rate characteristics and many other issues.
"On a global scale, we first adopted ultra-thin transition metal hydroxide materials and prepared a positive electrode material with long lifetime and high coulombic efficiency (the Coulomb efficiency refers to the ratio of discharge capacity to charge capacity)," Yu introduced.
Yu Hao revealed that currently most of the electric vehicles on the market use lithium batteries, and lithium-sulfur batteries have been expected to be the next generation of automotive power batteries. However, lithium-sulphur batteries have short cycle times (repeated usage does not exceed 300 times). Improvements.
"The improved upgraded Lithium-Sulfur battery has a Coulomb efficiency of more than 98%, and the battery life can be increased to at least 600 kilometers. The lithium-sulphur battery life cycle, that is, charge and discharge can be increased to 800 times. These are our breakthroughs." .
It is reported that the scientific research team led by Academician Huang Wei is dedicated to research on phosphorescent materials and solar cell materials. The research results have been published in the international academic journal Natural Communications. (Mr. Somerset)
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