Conformal Coating of Heterogeneous CoO/Co Nanocomposites on Carbon Nanotubes as Efficient Bifunctional Electrocatalyst for Li-Air Batteries

Liu, Ying1,2; Liu, Yan3; Cheng, Samson Ho-Sum2; Yu, Sichen1; Nan, Bo1; Bian, Haidong2; Md, Kamruzzaman4; Wang, Man2; Chung, C. Y.2; Lu, Zhou-Guang1

2016-11-20

10.1016/j.electacta.2016.10.064

ELECTROCHIMICA ACTA   影响因子和分区

0013-4686

1873-3859

The effective design of noble-metal-free electrocatalysts is critical for improving the stability and cyclability of Li-air batteries. In this report, CoO/Co nanoparticles are conformally decorated on the surface of CNTs by a facile chemical bath deposition followed by thermal annealing. In a simulated air environment, Li-air battery with the CNTs@CoO/Co electrocatalyst exhibits a dramatic reduction of charge voltage overpotentials (0.39 V) and good cycling stability (110 cycles) as compared with that made with bare CNTs. The superior electrochemical performances are ascribed to the prior and strong absorption of LiO2 on the surface of CoO/Co, which can alleviate the formation of side-products, then leading to a decreased overpotential. The synergistic effect between CoO/Co and CNTs can also provide more catalytic sites for the ORR/OER, promoting the formation/decomposition reversibility of Li2O2. These results confirm that the CNTs@CoO/Co electrode can be a promising electrocatalyst for Li-air batteries. (C) 2016 Elsevier Ltd. All rights reserved.

Cobalt oxide Carbon nanotube Oxygen reduction reaction Oxygen evolution reaction Li-air battery

SCI ; EI

英语

第一 ; 通讯

Science and Technology Innovation Foundation for the Undergraduates of SUSTC[2014S07] ; Science and Technology Innovation Foundation for the Undergraduates of SUSTC[2015X19]

Electrochemistry

Electrochemistry

WOS:000386656700063

PERGAMON-ELSEVIER SCIENCE LTD

20164302937836

Carbon nanotubes ; Electrocatalysts ; Electrolytic reduction ; Lithium compounds ; Lithium-air batteries ; Precious metals ; Yarn

Ore Treatment:533.1 ; Precious Metals:547.1 ; Nanotechnology:761 ; Chemical Agents and Basic Industrial Chemicals:803 ; Fiber Products:819.4

CHEMISTRY

Web of Science

1.South Univ Sci & Technol China, Dept Mat Sci & Engn, Shenzhen, Peoples R China
2.City Univ Hong Kong, Dept Phys & Mat Sci, Hong Kong, Hong Kong, Peoples R China
3.Hong Kong Polytech Univ, Dept Appl Phys, Hong Kong, Hong Kong, Peoples R China
4.City Univ Hong Kong, Dept Phys & Mat Sci, Ctr Super Diamond & Adv Films COSDAF, Hong Kong, Hong Kong, Peoples R China

Liu, Ying,Liu, Yan,Cheng, Samson Ho-Sum,et al. Conformal Coating of Heterogeneous CoO/Co Nanocomposites on Carbon Nanotubes as Efficient Bifunctional Electrocatalyst for Li-Air Batteries[J]. ELECTROCHIMICA ACTA,2016,219:560-567.

Liu, Ying.,Liu, Yan.,Cheng, Samson Ho-Sum.,Yu, Sichen.,Nan, Bo.,...&Lu, Zhou-Guang.(2016).Conformal Coating of Heterogeneous CoO/Co Nanocomposites on Carbon Nanotubes as Efficient Bifunctional Electrocatalyst for Li-Air Batteries.ELECTROCHIMICA ACTA,219,560-567.

Liu, Ying,et al."Conformal Coating of Heterogeneous CoO/Co Nanocomposites on Carbon Nanotubes as Efficient Bifunctional Electrocatalyst for Li-Air Batteries".ELECTROCHIMICA ACTA 219(2016):560-567.