Ruthenium decorated hierarchically ordered macro-mesoporous carbon for lithium oxygen batteries

被引：47

作者：

Guo, Xin ^{[1
]}

Sun, Bing ^{[1
]}

Zhang, Jinqiang ^{[1
]}

Liu, Hao ^{[1
]}

Wang, Guoxiu ^{[1
]}

机构：

[1] Univ Technol Sydney, Ctr Clean Energy Technol, Sydney, NSW 2007, Australia

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2016年 / 4卷 / 25期

基金：

澳大利亚研究理事会;

关键词：

LI-AIR BATTERIES; LI-O-2; BATTERIES; BIFUNCTIONAL CATALYST; CATHODE CATALYSTS; LONG-LIFE; IN-SITU; PERFORMANCE; NANOPARTICLES; GRAPHENE; ELECTRODE;

D O I：

10.1039/c6ta00317f

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Design and synthesis of functional cathode materials with superior catalytic activity are still a major challenge for non-aqueous Li-O-2 batteries. Herein, we developed a ruthenium-decorated hierarchically ordered macro-mesoporous carbon (MmC@Ru) via a mixed template method. The as-prepared MmC@Ru exhibits an ordered macroporous carbon skeleton with well-distributed mesopores, which are uniformly decorated by Ru nanoparticles. Cathodes made of MmC@Ru can provide enough room to accommodate the discharge products, facilitate the oxygen and electrolyte diffusion and then reduce the charge and discharge overpotential. As evaluated by electrochemical tests, it was found that the MmC@ Ru cathode presents a high specific capacity of 12 400 mA h g(-1) at a current density of 200 mA g(-1) and an excellent cycling performance up to 100 cycles at 400 mA g(-1) with the restricted capacity at 1000 mA h g(-1).

引用

页码：9774 / 9780

页数：7

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