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Ruthenium-Functionalized Hierarchical Carbon Nanocages as Efficient Catalysts for Li-O-2 Batteries

TitleRuthenium-Functionalized Hierarchical Carbon Nanocages as Efficient Catalysts for Li-O-2 Batteries
Publication TypeJournal Article
Year of Publication2017
AuthorsWang, Liangjun, Lyu Zhiyang, Gong Lili, Zhang Jian, Wu Qiang, Wang Xizhang, Huo Fengwei, Huang Wei, Hu Zheng, and Chen Wei
JournalChemNanoMat
Volume3
Pagination415–419
Date Published06/2017
ISSN2199-692X
Keywordsbifunctional catalyst, carbon nanocages, cathode catalysts, Electrocatalysis, facile synthesis, ion batteries, li-air batteries, li/air batteries, lithium oxygen battery, lithium-oxygen batteries, long-life, porous graphene, ru nanoparticles, ruthenium
Abstract

Developing an efficient cathode is essential to obtain high rate capability and rechargeable lithium oxygen (Li-O-2) batteries. Herein, ruthenium (Ru)-functionalized hierarchical carbon nanocages (hCNCs) are synthesized and employed as a cathode catalyst for Li-O-2 batteries. The as-prepared cathode exhibits high discharge capacity, low charge potential (8135 mAhg(-1) with 3.85V charge potential at a current density of 0.08 mAcm(-2)), outstanding rate capability (3416 mAhg(-1) at a current density of 0.48 mAcm(-2)) and good stability up to 78 cycles at a limited capacity of 500 mAhg(-1). Such excellent battery performance is ascribed to the synergistic effect of the interconnected hierarchically porous structure of hCNCs, which can facilitate effective electrolyte immersion and efficient Li+/O-2 mass transport, and the high catalytic activity of Ru nanoparticles.

DOI10.1002/cnma.201700023

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