Lithium-air battery internal organic material ceramic material
Replace and solve lifespan degradation problem... AEM cover decoration A domestic research team has developed battery technology for electric vehicles that can run 1,000 km on a single charge, which is longer than the round trip distance between Seoul and Busan.
A joint research team from Ulsan National Institute of Science and Technology (UNIST) and Samsung Electronics' Advanced Institute of Technology announced on the 15th that they have solved the problem of reduced battery life, which had been pointed out as a challenge in commercialization, by replacing the organic material inside lithium-air batteries, which are attracting attention as next-generation batteries, with ceramic materials.
.jpg)
▲ Structure and performance of the developed battery [Figure = UNIST]
Lithium-air batteries can store more than 10 times more energy than lithium-ion batteries currently used in electronic devices and electric vehicles. Since they use oxygen in the air as an electrode material, they are more lightweight than lithium-ion batteries that use metal materials.
However, there was a chronic problem of reduced battery life due to active oxygen generated during battery operation. The research team replaced the organic material inside the battery with high-performance ceramic material to extend the battery life. The charge/discharge life, which was previously less than 10 times, was improved to more than 100 times.
In addition, it is noteworthy that ceramic materials in solid form simultaneously possess excellent ionic and electronic conductivity. Typically, ceramic materials only have high ionic conductivity, but the material developed this time also has high electronic conductivity, so it can be used in various battery components.
The research team found a material with high conductivity for both ions and electrons using a quantum mechanical modeling technique based on density functional theory. Through this, they revealed that a ceramic material with a perovskite structure containing manganese or cobalt has high lithium ion conductivity and electron conductivity at the same time.
Professor Dong-Hwa Seo of UNIST, the corresponding author, said, “The new ceramic material can simultaneously transfer electrons and lithium ions, so it can be used not only in lithium-air batteries but also in other battery fields.”
Meanwhile, the results of this study were selected as the cover paper for 'Advanced Energy Materials', a renowned academic journal in the field of energy materials, and were published on October 13.
.jpg)
사업화에 관심이 큼