Electrochemical properties of MnS-C and MnO-C composite powders prepared via spray drying process

Kyung Min Jeon, Jung Sang Cho, Yun Chan Kang

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Abstract Spherical micron-sized MnS-C and MnO-C composite powders are successfully prepared by post-treating the spray-dried precursor powders. Dextrin, which is used as the carbon source material, plays a key role in the preparation of the composite powders with regular morphologies; the bare MnS and MnO powders prepared from the spray solution without dextrin have irregular morphologies. The MnS-C composite powders prepared from the spray solution containing 17 g L-1 of dextrin have mixed crystal structures of α- and γ-MnS phases. These powders exhibit superior electrochemical properties compared with those of their MnS and MnO-C counterparts. For example, at a current density of 0.5 A g-1, the MnO-C powders have a 100th-cycle discharge capacity of 321 mA h g-1; the corresponding discharge capacities of the MnS powders prepared from spray solutions containing 0, 17, and 50 g L-1 of dextrin are 501, 786, and 636 mA h g-1, respectively.

Original languageEnglish
Article number21426
Pages (from-to)9-15
Number of pages7
JournalJournal of Power Sources
Volume295
DOIs
Publication statusPublished - 2015 Jul 8

Keywords

  • Carbon composite
  • Energy conversion
  • Energy storage materials
  • Manganese sulfide
  • Spray drying

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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