Improving the Performance of Perovskite in Nonaqueous Oxygen Electrocatalysis

Meihua Lu; Chaohe Xu; Yi Zhan; Jim Yang Lee

doi:10.1002/asia.201501102

Improving the Performance of Perovskite in Nonaqueous Oxygen Electrocatalysis

Chem Asian J. 2016 Apr 20;11(8):1210-7. doi: 10.1002/asia.201501102. Epub 2016 Jan 8.

Authors

Meihua Lu¹, Chaohe Xu², Yi Zhan¹, Jim Yang Lee³

Affiliations

¹ Department of Chemical and Biomolecular Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore, 119260, Singapore.
² College of Aerospace Engineering, Chongqing University, Chongqing, 400044, P.R. China.
³ Department of Chemical and Biomolecular Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore, 119260, Singapore. cheleejy@nus.edu.sg.

PMID: 26663461
DOI: 10.1002/asia.201501102

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.

Keywords: composites; graphene; lanthanum cobalt oxide; lithium-oxygen batteries; oxygen catalysts.

Publication types

Research Support, Non-U.S. Gov't