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Cho, Jaephil
Nano Energy Storage Materials Lab (NESM)
Research Interests
  • Li-ion battery, metal-air battery, redox-flow battery, flexible battery .

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Lattice-Oxygen-Stabilized Li- and Mn-Rich Cathodes with Sub-Micrometer Particles by Modifying the Excess-Li Distribution

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dc.contributor.author Hwang, Jaeseong ko
dc.contributor.author Myeong, Seungjun ko
dc.contributor.author Lee, Eunryeol ko
dc.contributor.author Jang, Haeseong ko
dc.contributor.author Yoon, Moonsu ko
dc.contributor.author Cha, Hyungyeon ko
dc.contributor.author Sung, Jaekyung ko
dc.contributor.author Kim, Min Gyu ko
dc.contributor.author Seo, Dong-Hwa ko
dc.contributor.author Cho, Jaephil ko
dc.date.available 2021-04-15T08:07:21Z -
dc.date.created 2021-04-13 ko
dc.date.issued 2021-05 ko
dc.identifier.citation ADVANCED MATERIALS, v.33, no.18, pp.2100352 ko
dc.identifier.issn 0935-9648 ko
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/52696 -
dc.description.abstract In recent years, Li- and Mn-rich layered oxides (LMRs) have been vigorously explored as promising cathodes for next-generation, Li-ion batteries due to their high specific energy. Nevertheless, their actual implementation is still far from a reality since the trade-off relationship between the particle size and chemical reversibility prevents LMRs from achieving a satisfactory, industrial energy density. To solve this material dilemma, herein, a novel morphological and structural design is introduced to Li1.11Mn0.49Ni0.29Co0.11O2, reporting a sub-micrometer-level LMR with a relatively delocalized, excess-Li system. This system exhibits an ultrahigh energy density of 2880 Wh L-1 and a long-lasting cycle retention of 83.1% after the 100th cycle for 45 degrees C full-cell cycling, despite its practical electrode conditions. This outstanding electrochemical performance is a result of greater lattice-oxygen stability in the delocalized excess-Li system because of the low amount of highly oxidized oxygen ions. Geometric dispersion of the labile oxygen ions effectively suppresses oxygen evolution from the lattice when delithiated, eradicating the rapid energy degradation in a practical cell system. ko
dc.language 영어 ko
dc.publisher WILEY-V C H VERLAG GMBH ko
dc.title Lattice-Oxygen-Stabilized Li- and Mn-Rich Cathodes with Sub-Micrometer Particles by Modifying the Excess-Li Distribution ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-85103425649 ko
dc.identifier.wosid 000634535000001 ko
dc.type.rims ART ko
dc.identifier.doi 10.1002/adma.202100352 ko
dc.identifier.url https://onlinelibrary.wiley.com/doi/10.1002/adma.202100352 ko
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