14November2018

Nano-Micro Letters

CuCr2O4@rGO Nanocomposites as High-Performance Cathode Catalyst for Rechargeable Lithium-Oxygen Batteries

Jiandi Liu1, Yanyan Zhao1, Xin Li1, Chunge Wang1, Yaping Zeng1, Guanghui Yue1, *, Qiang Chen2

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Nano-Micro Lett. (2018) 10: 22

First Online: 15 November 2017 (Article)

DOI:10.1007/s40820-017-0175-z

*Corresponding author. E-mail: yuegh@xmu.edu.cn

 

Abstract

 


Fig. 6 Schematic illustration for the function of LOBs using CCO@rGO catalyst

Rechargeable lithium-oxygen batteries have been considered as a promising energy storage technology because of their ultra-high theoretical energy densities which are comparable to gasoline. In order to improve the electrochemical properties of lithium-oxygen batteries (LOBs), especially the cycling performance, a high-efficiency cathode catalyst is the most important component. Hence, we aim to demonstrate that CuCr2O4@rGO (CCO@rGO) nanocomposites, which are synthesized using a facile hydrothermal method, and followed by a series of calcination processes, is an effective cathode catalyst. The obtained CCO@rGO nanocomposites which served as the cathode catalyst of the LOBs, exhibited an outstanding cycling performance for over 100 cycles with a fixed capacity of 1000 mAh g-1 at a current density of 200 mA g-1. The enhanced properties were attributed to the synergistic effect between the high catalytic efficiency of the spinel-structured CCO nanoparticles, the high specific surface area, and high conductivity of the rGO.


 

Keywords

CuCr2O4@rGO nanocomposites; Cathode catalyst; Lithium-Oxygen batteries

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