Carbon electrode with NiO and RuO2 nanoparticles improves the cycling life of non-aqueous lithium-oxygen batteries

P. Tan, W. Shyy, M. C. Wu, Y. Y. Huang, T. S. Zhao

Research output: Journal article publicationJournal articleAcademic researchpeer-review

25 Citations (Scopus)

Abstract

Carbon has been regarded as one of the most attractive cathode materials for non-aqueous lithium-oxygen batteries due to its excellent conductivity, high specific area, large porosity, and low cost. However, a key disadvantage of carbon electrodes lies in the fact that carbon may react with Li2O2 and electrolyte to form irreversible side products (e.g. Li2CO3) at the active surfaces, leading to a high charge voltage and a short cycling life. In this work, we address this issue by decorating NiO and RuO2 nanoparticles onto carbon surfaces. It is demonstrated that the NiO-RuO2 nanoparticle-decorated carbon electrode not only catalyzes both the oxygen reduction and evolution reactions, but also promotes the decomposition of side products. As a result, the battery fitted with the novel carbon cathode delivers a capacity of 3653 mAh g−1 at a current density of 400 mA g−1, with a charge plateau of 4.01 V. This performance is 440 mV lower than that of the battery fitted with a pristine carbon cathode. The present cathode is also able to operate for 50 cycles without capacity decay at a fixed capacity of 1000 mAh g−1, which is more than twice the cycle number of that of the pristine carbon cathode.

Original languageEnglish
Pages (from-to)303-312
Number of pages10
JournalJournal of Power Sources
Volume326
DOIs
Publication statusPublished - 15 Sep 2016
Externally publishedYes

Keywords

  • Charge voltage
  • Lithium peroxide
  • Lithium-oxygen battery
  • Nanoparticle
  • Side products

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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