Investigations on hydrogenation behaviour of CNT admixed Mg2Ni |
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Authors: | Sunil Kumar Pandey Rajesh Kumar SinghON Srivastava |
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Affiliation: | Hydrogen Energy Centre, Department of Physics, Banaras Hindu University, Varanasi, Uttar Pradesh 221005, India |
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Abstract: | The aim of the present paper is to report results on hydrogenation behaviour of the new composite material Mg2Ni: CNT. Admixing of carbon nanotubes (CNT) in storage material Mg2Ni leads to noticeable enhancement in desorption kinetics as well as storage capacity. We have found that the composite material Mg2Ni–2 mole% CNT is the optimum material. The Mg2Ni–CNT composite exhibits hydrogen desorption rate of 5.7 cc/g/min as against 3.0 cc/g/min for Mg2Ni alone (enhancement of ∼ 90%) and storage capacity of ∼ 4.20 wt% in contrast to ∼3.20 wt% for Mg2Ni alone (increase of ∼ 31%). Feasible mechanisms for the enhancement of hydrogen desorption kinetics and storage capacity have been put forward. |
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Keywords: | Mg2Ni CNT Hydrogen storage Desorption kinetics X-ray diffraction TEM |
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