Cobalt-copper layered double hydroxide nanosheets as high performance bifunctional catalysts for rechargeable lithium-air batteries

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Author(s)

  • Ying Liu
  • Yan Liu
  • Haohong Shi
  • Man Wang
  • Haidong Bian
  • Md Kamruzzaman
  • Lujie Cao
  • Zhouguang Lu

Detail(s)

Original languageEnglish
Pages (from-to)380-387
Journal / PublicationJournal of Alloys and Compounds
Volume688
Online published21 Jul 2016
Publication statusPublished - 15 Dec 2016

Abstract

Designing novel cost-effective catalysts is one of the greatest challenges in the development of high-performance rechargeable Li-air battery. Here, we report the synthesis of novel cobalt-copper layered double hydroxide (LDH) nanosheets via a simple co-precipitation method under Ar gas. The resulting Co-Cu LDH nanosheets, possessing an average thickness of 4.3 nm and a high surface area of 163 m2 g−1, have been applied as bifunctional catalysts for Li-air battery. In the simulated air environment, Li-air batteries with Co-Cu LDH nanosheets demonstrate higher discharge capacity of 4870 mAh g−1at 200 mA g−1, lower charge overpotential and better cycling stability with controlling capacity of 1000 mAh g−1, which is much better than that with CuCo2O4electrode. The enhanced electrochemical performance is ascribed to the large interface between electrolytes and catalysts resulting from high surface area of Co-Cu LDH, providing plenty of actives sites to promote the formation/decomposition of Li2O2. The unique ultrathin nanosheet structure of Co-Cu LDH can also facilitate the mass transportation of O2and ions in Li-air battery.

Research Area(s)

  • Catalysts, Cobalt-copper layered double hydroxide, Lithium-air batteries, Nanosheets, Oxygen evolution reaction

Citation Format(s)

Cobalt-copper layered double hydroxide nanosheets as high performance bifunctional catalysts for rechargeable lithium-air batteries. / Liu, Ying; Liu, Yan; Shi, Haohong; Wang, Man; Cheng, Samson Ho-Sum; Bian, Haidong; Kamruzzaman, Md; Cao, Lujie; Chung, C. Y.; Lu, Zhouguang.

In: Journal of Alloys and Compounds, Vol. 688, 15.12.2016, p. 380-387.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal