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Title: A study of room-temperature LixMn1.5Ni0.5O4 solid solutions

Journal Article · · Scientific Reports
DOI:https://doi.org/10.1038/srep08027· OSTI ID:1256049
 [1];  [1];  [1];  [1]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Understanding the kinetic implication of solid-solution vs. biphasic reaction pathways is critical for the development of advanced intercalation electrode materials. Yet this has been a long-standing challenge in materials science due to the elusive metastable nature of solid solution phases. The present study reports the synthesis, isolation, and characterization of room-temperature LixMn1.5Ni0.5O4 solid solutions. In situ XRD studies performed on pristine and chemically-delithiated, micron-sized single crystals reveal the thermal behavior of LixMn1.5Ni0.5O4 (0 ≤ x ≤ 1) cathode material consisting of three cubic phases: LiMn1.5Ni0.5O4 (Phase I), Li0.5Mn1.5Ni0.5O4 (Phase II) and Mn1.5Ni0.5O4 (Phase III). A phase diagram capturing the structural changes as functions of both temperature and Li content was established. In conclusion, the work not only demonstrates the possibility of synthesizing alternative electrode materials that are metastable in nature, but also enables in-depth evaluation on the physical, electrochemical and kinetic properties of transient intermediate phases and their role in battery electrode performance.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1256049
Journal Information:
Scientific Reports, Vol. 5; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 33 works
Citation information provided by
Web of Science

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Long-term chemothermal stability of delithiated NCA in polymer solid-state batteries journal January 2019
Stroboscopic neutron diffraction applied to fast time-resolved operando studies on Li-ion batteries (d-LiNi 0.5 Mn 1.5 O 4 vs. graphite) journal January 2020
High temperature electrode-electrolyte interface formation between LiMn 1.5 Ni 0.5 O 4 and Li 1.4 Al 0.4 Ge 1.6 (PO 4 ) 3 journal October 2017
Topological defect dynamics in operando battery nanoparticles journal June 2015
Application of Operando X-ray Diffraction and Raman Spectroscopies in Elucidating the Behavior of Cathode in Lithium-Ion Batteries journal July 2018
Long-Term Chemothermal Stability of Delithiated NCA in Polymer Solid-State Batteries text January 2019