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Nanomaterials 2016, 6(4), 60; doi:10.3390/nano6040060

Synthesis of Lithium Metal Oxide Nanoparticles by Induction Thermal Plasmas

1
Department of Chemical Engineering, Faculty of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
2
Department of Chemical Systems and Engineering, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
3
Chemical Engineering Course, School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
*
Author to whom correspondence should be addressed.
Academic Editors: Krasimir Vasilev and Melanie Ramiasa
Received: 25 January 2016 / Revised: 17 March 2016 / Accepted: 29 March 2016 / Published: 6 April 2016
(This article belongs to the Special Issue Plasma Nanoengineering and Nanofabrication)
View Full-Text   |   Download PDF [3379 KB, uploaded 6 April 2016]   |  

Abstract

Lithium metal oxide nanoparticles were synthesized by induction thermal plasma. Four different systems—Li–Mn, Li–Cr, Li–Co, and Li–Ni—were compared to understand formation mechanism of Li–Me oxide nanoparticles in thermal plasma process. Analyses of X-ray diffractometry and electron microscopy showed that Li–Me oxide nanoparticles were successfully synthesized in Li–Mn, Li–Cr, and Li–Co systems. Spinel structured LiMn2O4 with truncated octahedral shape was formed. Layer structured LiCrO2 or LiCoO2 nanoparticles with polyhedral shapes were also synthesized in Li–Cr or Li–Co systems. By contrast, Li–Ni oxide nanoparticles were not synthesized in the Li–Ni system. Nucleation temperatures of each metal in the considered system were evaluated. The relationship between the nucleation temperature and melting and boiling points suggests that the melting points of metal oxides have a strong influence on the formation of lithium metal oxide nanoparticles. A lower melting temperature leads to a longer reaction time, resulting in a higher fraction of the lithium metal oxide nanoparticles in the prepared nanoparticles. View Full-Text
Keywords: thermal plasmas; lithium metal oxide; nanoparticle formation mechanism thermal plasmas; lithium metal oxide; nanoparticle formation mechanism
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MDPI and ACS Style

Tanaka, M.; Kageyama, T.; Sone, H.; Yoshida, S.; Okamoto, D.; Watanabe, T. Synthesis of Lithium Metal Oxide Nanoparticles by Induction Thermal Plasmas. Nanomaterials 2016, 6, 60.

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