Growth-controlled NiCo<inf>2</inf>S<inf>4</inf> nanosheet arrays with self-decorated nanoneedles for high-performance pseudocapacitors

Liyang Lin, Jianlin Liu, Tianmo Liu, Jinghua Hao, Kemeng Ji, Rong Sun, Wen Zeng, Zhongchang Wang

    研究成果: Article査読

    88 被引用数 (Scopus)

    抄録

    We report a synthesis of NiCo<inf>2</inf>S<inf>4</inf> nanosheet arrays with self-decorated nanoneedles on nickel foams by a facile and efficient two-step hydrothermal approach. We demonstrate that the morphologies of various three-dimensional nanostructures such as nanoneedle arrays, nanosheet arrays, and nanoneedle-decorated nanosheet arrays can be manipulated by tuning the amount of additive ammonium fluoride alone in the reaction. The unusual nanostructure of nanoneedles grown on the surface of NiCo<inf>2</inf>S<inf>4</inf> nanosheet arrays shows a large electroactive surface area and superior electrochemical properties. The electrode made of the NiCo<inf>2</inf>S<inf>4</inf> nanosheet arrays with self-decorated nanoneedles shows greatly improved electrochemical performances with an ultrahigh specific capacitance of 2617.6 F g<sup>-1</sup> at a current density of 15 mA cm<sup>-2</sup> and of 2051.0 F g<sup>-1</sup> even at a current density of 30 mA cm<sup>-2</sup>. The electrode also exhibits an excellent cycling stability by retaining 93.2% of its original state after 5000 cycles, rendering the NiCo<inf>2</inf>S<inf>4</inf> nanosheet arrays with self-decorated nanoneedles a potential electrode material for high-performance supercapacitors.

    本文言語English
    ページ(範囲)17652-17658
    ページ数7
    ジャーナルJournal of Materials Chemistry A
    3
    34
    DOI
    出版ステータスPublished - 2015 7 17

    ASJC Scopus subject areas

    • 化学 (全般)
    • 再生可能エネルギー、持続可能性、環境
    • 材料科学(全般)

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