An effective three-dimensional ordered mesoporous CuCo2O4 as electrocatalyst for Li-O2 batteries

Pengfa Li, Wang Sun*, Qilin Yu, Peng Yang, Jinshuo Qiao, Zhenhua Wang, David Rooney, Kening Sun

*Corresponding author for this work

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Three-dimensional ordered mesoporous (3DOM) CuCo2O4 materials have been synthesized via a hard template and used as bifunctional electrocatalysts for rechargeable Li-O2 batteries. The characterization of the catalyst by X-ray diffractometry and transmission electron microscopy confirms the formation of a single-phase, 3-dimensional, ordered mesoporous CuCo2O4 structure. The as-prepared CuCo2O4 nanoparticles possess a high specific surface area of 97.1 m2 g- 1 and a spinel crystalline structure. Cyclic voltammetry demonstrates that mesoporous CuCo2O4 catalyst enhances the kinetics for either oxygen reduction reaction (ORR) or oxygen evolution reaction (OER). The Li-O2 battery utilizing 3DOM CuCo2O4 shows a higher specific capacity of 7456 mAh g- 1 than that with pure Ketjen black (KB). Moreover, the CuCo2O4-based electrode enables much enhanced cyclability with a 610 mV smaller discharge-recharge voltage gap than that of the carbon-only cathode at a current rate of 100 mA g- 1. Such excellent catalytic performance of CuCo2O4 could be associated with its larger surface area and 3D ordered mesoporous structure. The excellent electrochemical performances coupled with its facile and cost-effective way will render the 3D mesoporous CuCo2O4 nanostructures as attractive electrode materials for promising application in Li-O2 batteries.

Original languageEnglish
Pages (from-to)17-22
Number of pages6
JournalSolid State Ionics
Volume289
Early online date05 Mar 2016
DOIs
Publication statusPublished - Jun 2016

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Keywords

  • Electrocatalyst
  • Lithium-oxygen battery
  • Ordered mesoporous CuCoO
  • Oxygen electrode

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