Jump to main content
Jump to site search

Issue 6, 2018
Previous Article Next Article

Enhanced cyclability of Li–O2 batteries with cathodes of Ir and MnO2 supported on well-defined TiN arrays

Author affiliations

Abstract

The cycling stability of Li–O2 batteries has been impeded by the lack of high-efficiency, and durable oxygen cathodes for the oxygen-reduction reaction (ORR) and the oxygen-evolution reaction (OER). Herein we report a novel TiN nanorod array-based cathode, which was firstly prepared by growing a TiN nanorod array on carbon paper (CP), and then followed by depositing MnO2 ultrathin sheets or Ir nanoparticles on the TiN nanorods to form well-ordered, three-dimensional (3D), and free-standing structured cathodes: TiN@MnO2/CP and TiN@Ir/CP. Both cathodes exhibited good specific capacity and excellent cycling stability. Their specific discharge capacities were up to 2637 and 2530 mA h g−1, respectively. After 200 cycles for 2000 h at a current density of 100 mA g−1, no obvious decays were observed for TiN@MnO2/CP and TiN@Ir/CP cathodes, while significant decreases were observed after the 80th and 30th cycles for the Pt/C and TiN/CP cathodes, respectively. Such high performance can be ascribed to the 3D array structure with enough microspace and high surface area, which facilitated the high dispersion of active components and prevented the formation of large/irreversible Li2O2.

Graphical abstract: Enhanced cyclability of Li–O2 batteries with cathodes of Ir and MnO2 supported on well-defined TiN arrays

Back to tab navigation

Supplementary files

Publication details

The article was received on 09 Nov 2017, accepted on 02 Jan 2018 and first published on 03 Jan 2018


Article type: Paper
DOI: 10.1039/C7NR08358K
Citation: Nanoscale, 2018,10, 2983-2989
  •   Request permissions

    Enhanced cyclability of Li–O2 batteries with cathodes of Ir and MnO2 supported on well-defined TiN arrays

    L. Leng, J. Li, X. Zeng, X. Tian, H. Song, Z. Cui, T. Shu, H. Wang, J. Ren and S. Liao, Nanoscale, 2018, 10, 2983
    DOI: 10.1039/C7NR08358K

Search articles by author

Spotlight

Advertisements