Scientists at South Korea’s Dongguk University have developed a next-generation hybrid anode material that significantly enhances the energy capacity and longevity of lithium-ion batteries, the university said on Monday.
The research team, led by Professor Jae-Min Oh in collaboration with Professor Seung-Min Paek of Kyungpook National University, introduced a novel hierarchical heterostructure composite that integrates reduced graphene oxide, or rGO, with nickel-iron layered double hydroxides or NiFe-LDH.
This hybrid design optimizes electron transport and charge storage, addressing key performance limitations in existing lithium-ion battery technology.
Lithium-ion batteries are the prevailing energy storage solution for electric vehicles, portable electronics, and renewable energy systems.
However, rising demand for faster charging and extended battery life has pushed researchers to explore advanced materials and nanoscale engineering.
Nanoscale Engineering Enhances Battery Performance
The study, published in the Chemical Engineering Journal and available online since January, outlines a layer-by-layer self-assembly approach to synthesize the composite.
Using polystyrene bead templates, researchers constructed a hollow spherical structure which, after thermal treatment, transformed into a hybrid of nanocrystalline nickel-iron oxide, or NiFe₂O₄, amorphous nickel oxide, or a-NiO, and rGO.
This structure enhances conductivity and prevents direct contact with the electrolyte, improving cycling stability.
High Capacity and Stability Confirmed by Testing
Electrochemical testing showed that the anode delivered a high specific capacity of 1687.6 mA h g⁻¹ at 100 mA g⁻¹ after 580 cycles, outperforming conventional materials. It also demonstrated strong rate performance under faster charge-discharge conditions.
“This breakthrough was made possible through close cooperation between experts in diverse materials,” Paek said in a statement. “By combining our strengths, we were able to design and optimize this hybrid system more effectively.”
Toward Next-Generation Energy Storage
Oh noted the importance of material synergy in future developments. “Energy storage materials will evolve beyond improving single components. Our research shows how combining materials can produce more efficient and reliable devices,” he said.
The researchers said the discovery could pave the way for lighter, longer-lasting lithium-ion batteries within the next five to ten years, supporting both consumer electronics and sustainable energy goals.
