Visualization of Structural Heterogeneities in Particles of Lithium Nickel Manganese Oxide Cathode Materials by Ptychographic X-ray Absorption Fine Structure

Hideshi Uematsu, Nozomu Ishiguro, Masaki Abe, Shuntaro Takazawa, Jungmin Kang, Eiji Hosono, Nguyen Duong Nguyen, Hieu Chi Dam, Masashi Okubo, Yukio Takahashi

Research output: Contribution to journalArticlepeer-review

Abstract

A heterogeneous phase/structure distribution in the bulk of spinel lithium nickel manganese oxides (LNMOs) is the key to maximizing the performance and stability of the cathode materials of lithium-ion batteries. Herein, we report the use of two-dimensional ptychographic X-ray absorption fine structure (XAFS) to visualize the density and valence maps of manganese and nickel in as-prepared LNMO particles and unsupervised learning to classify the three-phase group in terms of different elemental compositions and chemical states. The described approach may increase the supply of information for nanoscale characterization and promote the design of suitable structural domains to maximize the performance and stability of batteries.

Original languageEnglish
Pages (from-to)5781-5788
Number of pages8
JournalJournal of Physical Chemistry Letters
Volume12
DOIs
Publication statusPublished - 2021

ASJC Scopus subject areas

  • Materials Science(all)
  • Physical and Theoretical Chemistry

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