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Defect-Driven Configurational Entropy in the High-Entropy Oxide Li1.5MO3-δ.
Mansley, Zachary R; Huang, Cynthia; Luo, Jessica; Barry, Patrick; Rodriguez-Campos, Armando; Millares, Marie F; Wang, Zhongling; Ma, Lu; Ehrlich, Steven N; Takeuchi, Esther S; Marschilok, Amy C; Yan, Shan; Takeuchi, Kenneth J; Zhu, Yimei.
Afiliación
  • Mansley ZR; Interdisciplinary Science Department, Brookhaven National Laboratory, Upton, New York 11973, United States.
  • Huang C; Institute of Energy: Environment, Sustainability and Equity, Stony Brook University, Stony Brook, New York 11794, United States.
  • Luo J; Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States.
  • Barry P; Institute of Energy: Environment, Sustainability and Equity, Stony Brook University, Stony Brook, New York 11794, United States.
  • Rodriguez-Campos A; Department of Chemistry, Stony Brook University, Stony Brook, New York 11794, United States.
  • Millares MF; Institute of Energy: Environment, Sustainability and Equity, Stony Brook University, Stony Brook, New York 11794, United States.
  • Wang Z; Department of Chemistry, Stony Brook University, Stony Brook, New York 11794, United States.
  • Ma L; Institute of Energy: Environment, Sustainability and Equity, Stony Brook University, Stony Brook, New York 11794, United States.
  • Ehrlich SN; Department of Chemistry, Stony Brook University, Stony Brook, New York 11794, United States.
  • Takeuchi ES; Institute of Energy: Environment, Sustainability and Equity, Stony Brook University, Stony Brook, New York 11794, United States.
  • Marschilok AC; Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States.
  • Yan S; Institute of Energy: Environment, Sustainability and Equity, Stony Brook University, Stony Brook, New York 11794, United States.
  • Takeuchi KJ; Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States.
  • Zhu Y; National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, New York 11973, United States.
Nano Lett ; 24(28): 8495-8501, 2024 Jul 17.
Article en En | MEDLINE | ID: mdl-38950351
ABSTRACT
Layered lithiated oxides are promising materials for next generation Li-ion battery cathode materials; however, instability during cycling results in poor performance over time compared to the high capacities theoretically possible with these materials. Here we report the characterizations of a Li1.47Mn0.57Al0.13Fe0.095Co0.105Ni0.095O2.49 high-entropy layered oxide (HELO) with the Li2MO3 structure where M = Mn, Al, Fe, Co, and Ni. Using electron microscopy and X-ray spectroscopy, we identify a homogeneous Li2MO3 structure stabilized by the entropic contribution of oxygen vacancies. This defect-driven entropy would not be attainable in the LiMO2 structure sometimes observed in similar materials as a secondary phase owing to the presence of fewer O sites and a 3+ oxidation state for the metal site; instead, a Li2-γMO3-δ is produced. Beyond Li2MO3, this defect-driven entropy approach to stabilizing novel compositions and phases can be applied to a wide array of future cathode materials including spinel and rock salt structures.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nano Lett Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nano Lett Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos