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

    11 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 (Co3(PO4)2) 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

    Bibliographical note

    Funding Information:
    This work was supported by Korea Small and Medium Business Administration ( S2230272 ) and by the R&D Center for Valuable Recycling (Global-Top R&BD Program) of the Ministry of Environment (Project No.: 2014001170002 ).

    Publisher Copyright:
    © 2015 Elsevier B.V.

    Keywords

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

    ASJC Scopus subject areas

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

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