Li–Ni–Mn-oxide nanoparticle synthesis by induction thermal plasmas for lithium ion battery electrode

Hirotaka Sone, Shuhei Yoshida, Manabu Tanaka, Takayuki Watanabe

Research output: Contribution to journalArticle

Abstract

<p>Synthesis of lithium nickel manganese oxide (LNMO) nanoparticles was performed by induction thermal plasmas. The change in the crystal structure of the LNMO nanoparticles was confirmed with the substitution of a part of Mn of the lithium nickel oxide nanoparticles with Ni. The formation mechanism of the nanoparticle crystal structure was investigated based on nucleation theory and thermodynamic considerations. The synthesized LNMO nanoparticles formed two crystal structures of cubic rock salt type Li<sub>0.4</sub>Ni<sub>1.2</sub>Mn<sub>0.4</sub>O<sub>2</sub> (space group <i>Fm3m</i>) of non-stoichiometry and cubic spinel type LiNi<sub>0.5</sub>Mn<sub>1.5</sub>O<sub>4</sub> (space group <i>Fd3m</i>). The cubic rock salt structure nanoparticles are easily formed when the molar ratio of Mn and (Ni + Mn) is taken as 0.25. The cubic spinel structure nanoparticles are easily formed when the Mn/(Ni + Mn) molar ratio is 0.875. The formation mechanism of the LNMO was generated by condensation of MnO and Li<sub>2</sub>O after nucleation of NiO. This report investigated the effect of the crystal structure and formation mechanism of the LNMO nanoparticles by varying the molar ratio of Ni and Mn formed by induction thermal plasma.</p>
Original languageEnglish
Pages (from-to)635-640
Number of pages6
JournalJournal of the Ceramic Society of Japan
Volume128
Issue number9
DOIs
Publication statusPublished - Sep 2020

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