Fabrication and electrochemical performance of 0.6Li 2MnO 3-0.4Li(Ni1/3 Co 1/3 Mn1/3)O 2 microspheres by two-step spray-drying process

Mun Yeong Son, Jung Kul Lee, Yun Chan Kang

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

0.6Li 2 MnO 3-0.4Li(Ni1/3 Co 1/3 Mn 1/3)O2 composite microspheres with dense structures are prepared by a two-step spray-drying process. Precursor powders with hollow and porous structures prepared by the spray-drying process are post-treated at a low temperature of 400°C and then wet-milled to obtain a slurry with high stability. The slurry of the mixture of metal oxides is spray-dried to prepare precursor aggregate powders several microns in size. Post-treatment of these powders at high temperatures (>700°C) produces 0.6Li 2 MnO 3-0.4Li(Ni1/3 Co 1/3 Mn 1/3)O2 composite microspheres with dense structures and high crystallinity. The mean size and geometric standard deviation of the composite microspheres post-treated at 9006C are 4 mmand 1.38, respectively. Further, the initial charge capacities of the aggregated microspheres post-treated at 700, 800, 900, and 10006C are 336, 349, 383, and 128 mA h g -1, respectively, and the corresponding discharge capacities are 286, 280, 302, and 77 mA h g-1, respectively. The discharge capacity of the composite microspheres post-treated at an optimum temperature of 9006C after 100 cycles is 242 mA h g-1, and the corresponding capacity retention is 80%.

Original languageEnglish
Article number5752
JournalScientific Reports
Volume4
DOIs
Publication statusPublished - 2014 Aug 29
Externally publishedYes

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Spray drying
Microspheres
Fabrication
Powders
Composite materials
Temperature
Oxides
Metals

ASJC Scopus subject areas

  • General

Cite this

Fabrication and electrochemical performance of 0.6Li 2MnO 3-0.4Li(Ni1/3 Co 1/3 Mn1/3)O 2 microspheres by two-step spray-drying process. / Son, Mun Yeong; Lee, Jung Kul; Kang, Yun Chan.

In: Scientific Reports, Vol. 4, 5752, 29.08.2014.

Research output: Contribution to journalArticle

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