Laser-hybrid fabrication of highly-dispersed substrate-bonded manganese carbonate microspheres

Ting Huang, Zhengdong Deng, Rongshi Xiao, Qiang Wu, Wuxiong Yang

Research output: Contribution to journalArticlepeer-review

Abstract

Development of binder-free electrode materials tightly bonded to current collector effectively improves the performance of energy conversion and storage devices. In this letter, we report the fabrication of highly-dispersed MnCO3 microspheres directly grown out of a laser cladded substrate through dealloying process. First, laser cladding of Cu and Mn powder mix creates a layer of single-phase Cu–Mn alloy on a stainless steel substrate. Next, during dealloying, Mn is preferentially oxidized on the surface of the Cu-Mn alloy layer where the MnCO3 nuclei instantaneously form and subsequently grow into hierarchical microspheres. The high dispersivity of MnCO3 microspheres signifies a large specific surface area, which is highly desirable as an electrode material. Additionally, our unique hybrid fabrication approach eliminates the need for adhesive between the electrode material and its supporting substrate, and thus minimizing the interface resistance.

Original languageEnglish
Pages (from-to)48-51
Number of pages4
JournalMaterials Letters
Volume183
DOIs
Publication statusPublished - 2016 Nov 15
Externally publishedYes

Keywords

  • Dealloying
  • Energy storage and conversion
  • Laser processing
  • Microsphere
  • MnCO

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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