Mechanical alloying preparation of fullerene-like Co3C nanoparticles with high hydrogen storage ability

Fullerene-like orthorhombic-structured Co3C nanoparticles have been synthesized by direct ball-milling of Co and graphene (GE) powders with different Co/GE weight ratios. Electrochemical measurements showed that the Co3C nanoparticles displayed excellent electrochemical hydrogen storage capacities a...

Full description

Saved in:
Bibliographic Details
Published in:International journal of hydrogen energy 2012-11, Vol.37 (22), p.17126-17130
Main Authors: Gao, Peng, Wang, Ying, Yang, Shaoqiang, Chen, Yujin, Xue, Zhu, Wang, Longqiang, Li, Guobao, Sun, Yuzeng
Format: Article
Language:English
Subjects:
Applied sciences
Ball-milling
Co3C
Cross-disciplinary physics: materials science
rheology
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Fullerene
Hydrogen storage
Materials science
Materials synthesis
materials processing
Nanoparticle
Physics
Transport and storage of energy
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Fullerene-like orthorhombic-structured Co3C nanoparticles have been synthesized by direct ball-milling of Co and graphene (GE) powders with different Co/GE weight ratios. Electrochemical measurements showed that the Co3C nanoparticles displayed excellent electrochemical hydrogen storage capacities and the maximum capacity reached 1415 mA h/g (5.176 wt% hydrogen) at room temperature and ambient pressure. The reaction mechanism and the reasons for the differences of the Co3C electrodes were also investigated. It was found that the quasi-reversible Co3CHx/Co3C reaction was dominant for all the Co3C electrodes. ► A series of Co3C nanoparticles have been synthesized by direct ball-milling. ► The maximum capacity reached 1415 mA h/g (5.176 wt% hydrogen) at ambient atmosphere. ► The reaction mechanism and the reasons were investigated. ► It is first report for the practical applications (>5 wt%) at ambient atmosphere.
ISSN:0360-3199
1879-3487
DOI:10.1016/j.ijhydene.2012.07.133