Facile synthesis and electroactivity of 3-D hierarchically superstructured cobalt orthophosphate for lithium-ion batteries

Changhoon Choi, Seung Deok Seo, Hyun Woo Shim, Mushtaq Ahmad Dar, In Sun Cho, Dong-Wan Kim

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

The synthesis of materials with ordered or self-assembled superstructures provides opportunities to tune the material's physical and chemical properties for energy storage device applications. Here, we report the synthesis of a three-dimensional (3-D) hierarchical cobalt orthophosphate (Co<inf>3</inf>(PO<inf>4</inf>)<inf>2</inf>) compound by a facile wet-chemical route at a low temperature (65 °C), followed by a dehydration process (600 °C). The resulting cobalt orthophosphate compounds were characterized by scanning electron microscope (SEM), X-ray diffraction (XRD), and thermogravimetric (TG)/differential thermal analysis (DTA). The compounds' electrochemical behavior for lithium-ion batteries was also investigated. Analysis revealed the flower-like microarchitecture of the cobalt orthophosphate compound, in which porous nano-plates with an average thickness of 150 nm were self-assembled into a microscale superstructure. As an anode material for lithium-ion batteries, the optimal cobalt orthophosphate compound showed stable cycle performance (0.083% capacity decay per cycle over 100 cycles).

Original languageEnglish
Article number35198
Pages (from-to)100-105
Number of pages6
JournalJournal of Alloys and Compounds
Volume652
DOIs
Publication statusPublished - 2015 Dec 15

Keywords

  • Cobalt orthophosphate
  • Hierarchical superstructure
  • Lithium-ion batteries
  • Porous nano-plates
  • Wet-chemical route

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Chemistry
  • Metals and Alloys

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