title: Perovskite-nitrogen-doped carbon nanotube composite as bifunctional catalysts for rechargeable lithium-air batteries.
abstract: Developing an effective bifunctional catalyst is a significant issue, as rechargeable metal-air batteries are very attractive for future energy systems. In this study, a facile one-pot process is introduced to prepare an advanced bifunctional catalyst (op-LN) incorporating nitrogen-doped carbon nanotubes (NCNTs) into perovskite La0.5 Sr0.5 Co0.8 Fe0.2 O3 nanoparticles (LSCF-NPs). Confirmed by half-cell testing, op-LN exhibits synergistic effects of LSCF-NP and NCNT with excellent bifunctionality for both the oxygen reduction reaction and the oxygen evolution reaction. Furthermore, op-LN exhibits comparable performances in these reactions to Pt/C and Ir/C, respectively, which highlights its potential for use as a commercially viable bifunctional catalyst. Moreover, the results obtained by testing op-LN in a practical Li-air battery demonstrate improved and complementary charge/discharge performance compared to those of LSCF-NP and NCNT, and this confirms that simply prepared op-LN is a promising candidate as a highly effective bifunctional catalyst for rechargeable metal-air batteries.
authors: Department of Chemical Engineering, Waterloo Institute for Nanotechnology, Waterloo Institute for Sustainable Energy, University of Waterloo, Waterloo, ON, N2L 3G1 (Canada).
authors: Hey Woong
authors: HW
authors: Park
authors: Dong Un
authors: DU
authors: Lee
authors: Moon Gyu
authors: MG
authors: Park
authors: Raihan
authors: R
authors: Ahmed
authors: Min Ho
authors: MH
authors: Seo
authors: Linda F
authors: LF
authors: Nazar
authors: Zhongwei
authors: Z
authors: Chen
mesh_terms: D000388:Air; D017610:Calcium Compounds / Q000737:chemistry*; D002384:Catalysis; D011211:Electric Power Supplies; D004563:Electrochemistry; D004566:Electrodes; D008094:Lithium / Q000737:chemistry*; D037742:Nanotubes, Carbon / Q000737:chemistry*; D009584:Nitrogen / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D014025:Titanium / Q000737:chemistry*
chemical_list: D017610:Calcium Compounds; D037742:Nanotubes, Carbon; D010087:Oxides; C059910:perovskite; D008094:Lithium; D014025:Titanium; D009584:Nitrogen
keywords: electrochemistry; energy conversion; lithium-air batteries; oxygen evolution reaction; oxygen reduction reaction