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Aprotic Lithium–Air Batteries Tested in Ambient Air with a High‐Performance and Low‐Cost Bifunctional Perovskite Catalyst
Author(s) -
Cheng Junfang,
Jiang Yuexing,
Zhang Ming,
Sun Yu,
Zou Lu,
Chi Bo,
Pu Jian,
Jian Li
Publication year - 2018
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201701666
Subject(s) - catalysis , bifunctional , perovskite (structure) , materials science , lithium (medication) , oxide , chemical engineering , oxygen , energy density , inorganic chemistry , chemistry , engineering physics , metallurgy , organic chemistry , medicine , engineering , endocrinology
Aprotic lithium–air batteries (LABs) with remarkably high energy density are facing some challenges, including insufficient cycle stability, high‐cost for applications, and unclear understanding about the mechanism. Seeking high‐performance and low‐cost catalysts is one of the effective solutions to resolve these problems. Perovskite oxide La 0.6 Sr 0.4 CoO 3 (LSC) together with Fe and Mn doped materials La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3 (LSCF) and La 0.6 Sr 0.4 Co 0.2 Mn 0.8 O 3 (LSCM) are prepared and applied as catalysts for LABs, which have been previously studied mostly in a pure oxygen atmosphere and rarely in ambient air. The results show that these catalysts are effective for LABs, and LSCF can improve the capacity and cycle number to 6027 mA h g −1 and 156 at current density of 400 mA g −1 in ambient air. The reasons for performance degradation of LABs tested in ambient air are discussed by EIS spectra and products analysis, which also clarifies the reason for improvement of the LSCF catalyst.