Park, Nam-Yung Park, Geon-Tae Ryu, Ji-Hyun Park, Seong-Eun Kim, Jae-Ho Lee, Seung-Yong Choi, Junhyeok Lee, Yong Min Kim, Min Gyu Lee, Heebeom Cline, Joseph P. Liu, Zhao Jung, Hun-Gi Sun, Yang-Kook 2026-01-15T09:30:23Z 2026-01-15T09:30:23Z 2026-01-12 2026-02 1748-3387 https://pubs.kist.re.kr/handle/201004/154025 Ni-rich layered oxide positive electrode active materials are promising for high-energy non-aqueous lithium-based batteries, but their poor structural stability limits their high-power applications. Here, to address this issue, we propose a two-step doping strategy for the synthesis of Ni-rich positive electrode active materials. This involves an initial lithiation of the hydroxide precursor at an intermediate temperature, followed by cooling, dopant mixing and high-temperature calcination. This approach yields positive electrode active materials with nanoscale primary particles, thereby improving mechanical stability and suppressing intergranular cracking. Moreover, the material prepared via a two-step doping strategy exhibits a layered–rocksalt nanostructured multiphase, which reversibly transforms into a layered-spinel nanostructured multiphase upon cell charging, facilitating lithium-ion diffusion. As a result, the nanostructured Nb-doped Ni-rich multiphase positive electrode active material enables improved high-rate performance when tested in both Li metal coin cell and Li-ion pouch cell configurations, also applying electric vertical take-off and landing testing protocols. English Nature Publishing Group Nanostructured niobium-doped nickel-rich multiphase positive electrode active material for high-power lithium-based batteries Article 10.1038/s41565-025-02092-y 1 Nature Nanotechnology, v.21, pp.240 - 248 Nature Nanotechnology 21 240 248 N scie scopus 2-s2.0-105025719143 Nanoscience & Nanotechnology Materials Science, Multidisciplinary Science & Technology - Other Topics Materials Science Article; Early Access NI-RICH CATHODE MATERIAL ELECTROCHEMICAL PROPERTIES CAPACITY