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

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

TitleA study of room-temperature LixMn1.5Ni0.5O4 solid solutions
Publication TypeJournal Article
Year of Publication2015
AuthorsSaravanan Kuppan, Angelique Jarry, Robert Kostecki, Guoying Chen
JournalScientific Reports
Volume5
Issue1
Date Published01/2015
Abstract

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. 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.

URLhttp://www.nature.com/articles/srep08027http://www.nature.com/articles/srep08027.pdfhttp://www.nature.com/articles/srep08027http://www.nature.com/articles/srep08027.pdf
DOI10.1038/srep08027
Short TitleSci Rep
Refereed DesignationRefereed