Professor Kyu-Younger Park of the Institute of Ferrous & Eco Supplies Know-how, Division of Supplies Science & Engineering, POSTECH led a analysis group that collaborated with Samsung SDI, Northwestern College, and Chung-Ang College to develop know-how that may considerably enhance the lifespan and power density of electrical car (EV) batteries. The examine was just lately revealed in ACS Nano.
A battery utilized in electrical autos should proceed functioning even after being charged and drained quite a few occasions. Nevertheless, the prevailing know-how has a big drawback: the battery’s constructive lively components continually increase and contract in the course of the charging and discharging course of, resulting in small cracks contained in the battery.
The battery’s efficiency considerably declines with time. Researchers are attempting to cease this by strengthening the cathode lively supplies or including reinforcing dopants, however these strategies aren’t but viable.
The important thing to this discovery is the ‘nano-spring coating’ approach, which may create elastic constructions. The researchers utilized a multi-walled carbon nanotube (MWCNT) on the floor of battery electrode supplies.
This absorbed pressure power is created in the course of the charging and discharging processes, stopping cracks and limiting electrode thickness variations, therefore bettering stability. The group efficiently and successfully managed cracks inside the battery, extending its lifespan and enhancing efficiency.
This method reduces resistance attributable to quantity variations within the materials utilizing solely a small quantity (0.5wt%, weight share) of conductive materials. It could actually obtain a excessive power density of 570 Wh/kg or increased. It additionally has a excessive longevity, with 78% of the preliminary battery capability remaining after 1,000 cost and discharge cycles or extra.
This system, specifically, could also be simply built-in into present battery manufacturing processes, permitting for speedy scale manufacturing and commercialization. This development is more likely to surpass present restrictions in battery know-how, paving the best way for extra environment friendly and long-lasting EV batteries, which might help design superior electrical autos.
With a unique method from present ones, this analysis successfully managed adjustments that would happen to a battery in the course of the charging and discharging course of. This know-how might be extensively used not solely within the secondary battery trade but in addition in varied industries the place materials sturdiness is necessary.
Kyu-Younger Park, Professor, Pohang College of Science and Know-how
This analysis was funded by Samsung SDI, the Ministry of Commerce, Trade, and Vitality, and the Ministry of Science and Info Know-how’s fundamental analysis fund.
Journal Reference:
Lim, J.-H. et. al. (2025) Enhancing Mechanical Resilience in Li-Ion Battery Cathodes with Nanoscale Elastic Framework Coatings. ACS Nano. doi.org/10.1021/acsnano.4c14980
