Construction of Stable Oxygen Redox by Electrochemical Activation O–TM–Se in Nickel‐Rich Layered Oxides for Lithium‐Ion Batteries

Autor:	Youqi Chu, Yongbiao Mu, Lingfeng Zou, Yan Hu, Shaowei Kang, Haixiang Ren, Meisheng Han, Qing Zhang, Lei Wei, Lin Zeng
Jazyk:	angličtina
Rok vydání:	2024
Předmět:	anionic redox chemistries cyclic stabilities irreversible oxygen LiNi0.8Co0.1Mn0.1O2 selenium modifications Physics QC1-999 Chemistry QD1-999
Zdroj:	Small Structures, Vol 5, Iss 1, Pp n/a-n/a (2024)
Druh dokumentu:	article
ISSN:	2688-4062
DOI:	10.1002/sstr.202300247
Popis:	The irreversible oxygen redox and structural degradation of LiNi0.8Co0.1Mn0.1O2 (NCM811) at a 4.5 V high voltage cause a severe decline in cycling performance for lithium‐ion batteries. In this study, a novel approach is proposed to enhance the anionic redox chemistry and stability of NCM811 cathode material by introducing gaseous selenium. Seβ+ species are selectively adsorbed within oxygen vacancies, leading to the continuous replacement of Oα− to form a stable O–TM–Se bond during deep charging. Furthermore, Selenium modification improves cationic redox efficiency and alleviates Oα− (α
Databáze:	Directory of Open Access Journals
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