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Improving the Performance of Perovskite in Nonaqueous Oxygen Electrocatalysis
Author(s) -
Lu Meihua,
Xu Chaohe,
Zhan Yi,
Lee Jim Yang
Publication year - 2016
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201501102
Subject(s) - electrocatalyst , perovskite (structure) , oxygen , materials science , environmental science , chemistry , chemical engineering , electrode , engineering , electrochemistry , organic chemistry
Abstract Nanoparticle (NP) aggregates of lanthanum cobalt oxide perovskite (LCO) were compounded with reduced graphene oxide (rGO) nanosheets and used as the cathode catalyst for nonaqueous lithium‐oxygen batteries (LOBs). The LCO NP aggregates were completely surrounded by rGO nanosheets in the composite with 10.5 wt % of rGO (LCO‐rGO‐10.5) but were partially exposed in the composite with 7.5 wt % of rGO (LCO‐rGO‐7.5). Both composites performed better than pristine LCO NPs and rGO nanosheets in nonaqueous oxygen electrocatalysis. The LCO‐rGO‐7.5 composite excelled at capacity and rate performance, while the LCO‐rGO‐10.5 composite was better at cycle stability. The good performance of the LCO‐rGO composites was due to the synergy of functions of LCO and rGO.