Liu Jiandi, Zhao Yanyan, Li Xin, Wang Chunge, Zeng Yaping, Yue Guanghui, Chen Qiang
Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen, 361005, People's Republic of China.
Fujian Provincial Key Laboratory of Plasma and Magnetic Resonance, Department of Electronic Science, Xiamen University, Xiamen, 361005, People's Republic of China.
Nanomicro Lett. 2018;10(2):22. doi: 10.1007/s40820-017-0175-z. Epub 2017 Dec 8.
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 CuCrO@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 at a current density of 200 mA g. 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.
可充电锂氧电池因其超高的理论能量密度（可与汽油相媲美）而被视为一种很有前景的储能技术。为了改善锂氧电池（LOBs）的电化学性能，尤其是循环性能，高效的阴极催化剂是最重要的组成部分。因此，我们旨在证明通过简便的水热法合成并经过一系列煅烧过程得到的CuCrO@rGO（CCO@rGO）纳米复合材料是一种有效的阴极催化剂。所制备的用作LOBs阴极催化剂的CCO@rGO纳米复合材料在电流密度为200 mA g时，以1000 mAh g的固定容量表现出超过100次循环的出色循环性能。性能的提升归因于尖晶石结构的CCO纳米颗粒的高催化效率、rGO的高比表面积和高导电性之间的协同效应。
