Jump to main content
Jump to site search


Achieving highly stable Li–O2 battery operation by designing a carbon nitride-based cathode towards a stable reaction interface

Author affiliations

Abstract

Aprotic Li–O2 batteries have attracted a great deal of attention because of their potential to offer much higher energy density than those provided by commercialized lithium-ion batteries. However, their reversible operation is plagued by serious side-reactions from liquid electrolytes and/or carbon-based materials. Recently, carbon-free materials have been proposed and utilized to construct stable cathodes for Li/O2 chemistry. Different from most of the previously reported metal-based carbon-free cathodes, herein we report a non-metal-based carbon-free cathode support consisting of mesoporous boron-doped carbon nitride (m-BCN) and demonstrate its excellent stability and activity for Li/O2 chemistry. Benefiting from the introduction of evenly distributed RuO2 nanoparticles (1–2 nm) in the pores of the boron-doped carbon nitride support, excellent cycle stability with a low overpotential (141 cycles with a pristine Li anode which is extended to 227 cycles after replacing it with a new Li anode at 0.5 mA cm−2) and superior rate capability (1.28 mA h cm−2 at 1 mA cm−2) are obtained. This impressive performance is ascribed to the enhanced stability and activity of such designed cathodes, which is supported by the fact that reversible formation and decomposition of Li2O2 with no accumulation of Li2CO3 is detected during cycling. These results demonstrate that manipulating cathode materials towards stable reaction interfaces is essential for alleviating the formation of by-products and improving the performance of Li–O2 batteries.

Graphical abstract: Achieving highly stable Li–O2 battery operation by designing a carbon nitride-based cathode towards a stable reaction interface

Back to tab navigation

Supplementary files

Publication details

The article was received on 09 Jun 2017, accepted on 02 Aug 2017 and first published on 02 Aug 2017


Article type: Paper
DOI: 10.1039/C7TA05009G
Citation: J. Mater. Chem. A, 2017, Advance Article
  •   Request permissions

    Achieving highly stable Li–O2 battery operation by designing a carbon nitride-based cathode towards a stable reaction interface

    P. Lou, Z. Cui and X. Guo, J. Mater. Chem. A, 2017, Advance Article , DOI: 10.1039/C7TA05009G

Search articles by author

Spotlight

Advertisements