One-pot synthesis of manganese oxide-carbon composite microspheres with three dimensional channels for Li-ion batteries

You Na Ko, Seung Bin Park, Seung Ho Choi, Yun Chan Kang

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

The fabrication of manganese oxide-carbon composite microspheres with open nanochannels and their electrochemical performance as anode materials for lithium ion batteries are investigated. Amorphous-like Mn3O4 nanoparticles embedded in a carbon matrix with three-dimensional channels are fabricated by one-pot spray pyrolysis. The electrochemical properties of the Mn 3O4 nanopowders are also compared with those of the Mn3O4-C composite microspheres possessing macropores resembling ant-cave networks. The discharge capacity of the Mn3O4-C composite microspheres at a current density of 500 mA g-1 is 622 mA h g -1 after 700 cycles. However, the discharge capacity of the Mn 3O4 nanopowders is as low as 219 mA h g21 after 100 cycles. The Mn3O4-C composite microspheres with structural advantages and high electrical conductivity have higher initial discharge and charge capacities and better cycling and rate performances compared to those of the Mn3O4 nanopowders.

Original languageEnglish
Article number5751
JournalScientific reports
Volume4
DOIs
Publication statusPublished - 2014 Aug 29
Externally publishedYes

ASJC Scopus subject areas

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