Kang, Seongkoo Choi, Dayeon Lee, Hakwoo Choi, Byungjin Kang, Yong-Mook 2024-01-19T08:32:45Z 2024-01-19T08:32:45Z 2023-07-20 2023-10 0935-9648 https://pubs.kist.re.kr/handle/201004/113242 Li-rich cathodes are extensively investigated as their energy density is superior to Li stoichiometric cathode materials. In addition to the transition metal redox, this intriguing electrochemical performance originates from the redox reaction of the anionic sublattice. This new redox process, the so-called anionic redox or, more directly, oxygen redox in the case of oxides, almost doubles the energy density of Li-rich cathodes compared to conventional cathodes. Numerous theoretical and experimental investigations have thoroughly established the current understanding of the oxygen redox of Li-rich cathodes. However, different reports are occasionally contradictory, indicating that current knowledge remains incomplete. Moreover, several practical issues still hinder the real-world application of Li-rich cathodes. As these issues are related to phenomena resulting from the electronic to atomic evolution induced by unstable oxygen redox, a fundamental multiscale understanding is essential for solving the problem. In this review, the current mechanistic understanding of oxygen redox, the origin of the practical problems, and how current studies tackle the issues are summarized. English WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim A Mechanistic Insight into the Oxygen Redox of Li-Rich Layered Cathodes and their Related Electronic/Atomic Behaviors Upon Cycling Article 10.1002/adma.202211965 1 Advanced Materials, v.35, no.43 Advanced Materials 35 43 N scie scopus 001019958000001 2-s2.0-85163681305 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Review LITHIUM-ION BATTERIES X-RAY-DIFFRACTION ANIONIC REDOX VOLTAGE HYSTERESIS HIGH-CAPACITY LOCAL-STRUCTURE ELECTROCHEMICAL ACTIVITY OXIDE CATHODES MN INTERCALATION Li-rich cathodes oxygen redox oxygen reorganization transition metal migration voltage hysteresis