Domestic researchers have proposed a new method to overcome the limitations of the 'zinc ion battery,' which is gaining attention as a next-generation technology.
Researcher Jo Yong-ryun from the Gwangju Institute of Science and Technology (GIST) Central Instrumentation Research Institute and Professor Ahn Geun-hyeong from Dongguk University reported on the 22nd that they developed a foundational technology that can significantly improve the performance and durability of zinc ion batteries. The research findings were published online in the international academic journal 'Advanced Energy Materials' on April 2nd.
Zinc ion batteries cost less and have a lower risk of explosion compared to lithium ion batteries, and they are easier to obtain resources, which makes them noteworthy in the next-generation large-capacity energy storage system (ESS) or renewable energy sectors. However, there are drawbacks such as rapid performance degradation during repetitive charge and discharge processes, and corrosion due to water-based electrolytes, leading to a shorter battery lifespan.
To resolve these issues, the research team developed a technology that applies graphene thinly and uniformly to the surface of a 'current collector,' which is a thin metal plate that transmits current. Graphene is a material with a planar structure where carbon is interconnected in a honeycomb shape, making it lightweight, strong, and excellent in electrical and thermal conductivity.
In particular, following the 'roll-to-roll' method of continuously moving the metal plate while coating the surface, it was possible to secure the electrical properties and durability of the material with a simple process of heat treatment at 400 degrees.
Batteries incorporating the developed material operated stably even under high-capacity conditions and maintained about 88.7% of their initial capacity after 1,500 charge and discharge cycles.
Professor Ahn Geun-hyeong noted, "This technology is an alternative that can surpass the limitations of existing lithium ion batteries in the energy storage sector," adding, "It will also greatly contribute to reducing energy expenses and enhancing supply chain stability as a sustainable energy technology."
References
Advanced Energy Materials (2025), DOI: https://doi.org/10.1002/aenm.202500261