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CuCr2O4@rGO Nanocomposites as High-Performance Cathode Catalyst for Rechargeable Lithium–Oxygen Batteries
Nano-Micro Letters ( IF 26.6 ) Pub Date : 2017-12-08 , DOI: 10.1007/s40820-017-0175-z
Jiandi Liu , Yanyan Zhao , Xin Li , Chunge Wang , Yaping Zeng , Guanghui Yue , Qiang Chen

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, are 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.
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中文翻译:

铜铬2个Ø4@rGO纳米复合材料可作为可充电锂氧电池的高性能阴极催化剂

可充电锂氧电池由于具有超高的理论能量密度(可与汽油媲美)而被认为是一种有前途的储能技术。为了改善锂氧电池(LOB)的电化学性能,特别是循环性能,高效阴极催化剂是最重要的组成部分。因此,我们旨在证明使用简便的水热法合成并随后进行一系列煅烧工艺的CuCr 2 O 4 @rGO(CCO @ rGO)纳米复合材料是有效的阴极催化剂。获得的用作LOBs阴极催化剂的CCO @ rGO纳米复合材料在100多个循环中表现出出色的循环性能,固定容量为1000 mAh g。-1在200 mA g -1的电流密度下。增强的性能归因于尖晶石结构的CCO纳米颗粒的高催化效率,rGO的高比表面积和高电导率之间的协同效应。
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更新日期:2017-12-08
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