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Lee, Hyun-Wook
Energy Storage and Electron Microscopy Laboratory
Research Interests
  • Energy storage, secondary batteries, transmission electron microscopy, real time analysis

Nanocomposite Engineering of a High‐capacity Partially Ordered Cathode for Li‐ion Batteries

DC Field Value Language Lee, Eunryeol ko Wi, Tae‐Ung ko Park, Jaehyun ko Park, Sang‐Wook ko Kim, Min‐Ho ko Lee, Dae‐Hyung ko Park, Byung‐Chun ko Jo, Chiho ko Malik, Rahul ko Lee, Jong Hoon ko Shin, Tae Joo ko Kang, Seok Ju ko Lee, Hyun-Wook ko Lee, Jinhyuk ko Seo, Dong-Hwa ko 2023-01-19T02:24:24Z - 2023-01-12 ko 2023-01 ko
dc.identifier.citation Advanced Materials, pp.2208423 ko
dc.identifier.issn 0935-9648 ko
dc.identifier.uri -
dc.description.abstract Understanding the local cation order in the crystal structure and its correlation with electrochemical performances has advanced the development of high-energy Mn-rich cathode materials for Li-ion batteries, notably Li- and Mn-rich layered cathodes (LMR, e.g., Li1.2Ni0.13Mn0.54Co0.13O2) that are considered as nanocomposite layered materials with C2/m Li2MnO3-type medium-range order (MRO). Moreover, the Li-transport rate in high-capacity Mn-based disordered rock-salt (DRX) cathodes (e.g., Li1.2Mn0.4Ti0.4O2) was found to be influenced by the short-range order (SRO) of cations, underlining the importance of engineering the local cation order in designing high-energy materials. Herein, we reveal the nanocomposite, heterogeneous nature (like MRO found in LMR) of ultrahigh-capacity partially ordered cathodes (e.g., Li1.68Mn1.6O3.7F0.3) made of distinct domains of spinel-, DRX- and layered-like phases, contrary to conventional single-phase DRX cathodes. This multi-scale understanding of ordering informs engineering the nanocomposite material via Ti doping, altering the intra-particle characteristics to increase the content of the rock-salt phase and heterogeneity within a particle. This strategy markedly improves the reversibility of both Mn- and O-redox processes to enhance the cycling stability of the partially ordered DRX cathodes (nearly ∼30% improvement of capacity retention). Our work sheds light on the importance of nanocomposite engineering to develop ultrahigh-performance, low-cost Li-ion cathode materials. ko
dc.language 영어 ko
dc.publisher WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim ko
dc.title Nanocomposite Engineering of a High‐capacity Partially Ordered Cathode for Li‐ion Batteries ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-85147513727 ko
dc.identifier.wosid 000928843300001 ko
dc.type.rims ART ko
dc.identifier.doi 10.1002/adma.202208423 ko
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