期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 118, 期 14, 页码 7344-7350出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp500597m
关键词
-
资金
- Key Project of the Chinese Academy of Sciences [KGZD-EW-202-2]
- Sony Corporation
- Science Foundation for Young Researchers of State Key Laboratory of High Performance Ceramics and Superfine Microstructures [SKL201104]
- National Natural Science Foundation of China [11174334]
Gold nanoparticles (AuNPs) anchored to vertically aligned carbon nanotubes (VACNTs) act as additional nucleation sites for the Li2O2 growth, leading to the decreased size while increased density of Li2O2 particles in process of discharge. Correspondingly, at the deep discharge to 2.0 V the batteries show increased specific capacity. Upon charge, the AuNPs exhibit promotion effect on the Li2O2 decomposition by improving the conduction property of the discharge-formed particles, rather than by imposing the conventional electrocatalytic effect on the oxygen evolution reaction. Moreover, the AuNPs show promotion effect on decomposition of carbonate species arising from the side reactions. These effects consequently lead to the reduced charge overpotentials and extended cycle operation of the batteries. The results here provide a new as well as clear picture on the role of incorporated AuNPs in the Li2O2 formation and decomposition, which would be helpful for better understanding and constructing of high-performance air cathodes.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据