Pohang University of Science and Technology · 工学
Professor Docheon Ahn's research lab specializes in the design, synthesis, and characterization of advanced functional materials for next-generation energy storage devices, with a primary focus on sodium-ion and lithium-ion batteries. The lab investigates layered oxide cathodes, doped olivine-structured materials, and nanostructured surface coatings to enhance electrochemical performance, structural stability, and ion diffusion kinetics. Through a combination of advanced materials characterization, computational optimization, and innovative surface engineering techniques such as in-situ polymerization, the lab develops high-performance cathode materials with tailored electronic and ionic conductivity. Their work bridges fundamental materials science with practical battery applications, aiming to enable sustainable and high-energy-density energy storage systems.
Figures are computed from collected data and may differ slightly.
The layered sodium transition metal oxide, NaTMO<sub>2</sub> (TM = transition metal), with a binary or ternary phases has displayed outstanding electrochemical performance as a new class of strategy cathode materials for sodium-ion batteries (SIBs). Herein, an in-depth phase analysis of developed Na<sub>1-x</sub> TMO<sub>2</sub> cathode materials, Na<sub>0.76</sub> Ni<sub>0.20</sub> Fe<sub>0.40</sub> Mn<sub>0.40</sub> O<sub>2</sub> with P2- and O3-type phases (NFMO-P2/O3) is offered. Structural
Thanks to the employment of a NSGA-II-based computation, which was used to determine the optimum multi-element doping composition at the Mn site of olivine-structured LiMnPO<sub>4</sub>, we can propose the first examples of high-performance doped-LiMnPO<sub>4</sub> cathodes for Li-ion batteries.
The surfaces of layer-structured Li[Li0.2Co0.1Mn0.7]O2 nanodisks were nanocoated with polyaniline and examined by SEM and TEM studies, via the chemical oxidative polymerization of aniline in an acid medium for 10 min—Mn4+ ions in the pristine lithium manganese oxides acted as oxidants. During this reaction, the crystal structure of the pristine nanodisks was retained, and the XRD patterns showed no evidence of H+ exchange with the Li+ located between the manganese oxide layers. The nanocoated po
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