Enhancing hydrogen storage capacity: MWCNT-infused Mg�Ti alloy synthesized via mechanical alloying

Nivedhitha, KS and Venkatesh, R and Banapurmath, NR and Ramesh, K and Sajjan, AM and Subramanian, K (2024) Enhancing hydrogen storage capacity: MWCNT-infused Mg�Ti alloy synthesized via mechanical alloying. In: International Journal of Hydrogen Energy, 67 . pp. 351-360.

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Abstract

Scientists are currently more interested in carbon allotropes since they are still having significant challenges in employing metal hydrides to achieve high hydrogen storage capacities. Mg�Ti alloy was created via mechanical alloying with MWCNT added. XRD confirms that the Mg�Ti solid solution exists. The existence of carbon in the Mg�Ti alloy was further validated by Raman analysis. The TEM investigation reveals that the electron diffraction measurements for the samples prior to hydrogenation have d spacing values of 2.3, 1.44, and 1.0,. The corresponding planes for these values are the (103) and (201) planes of the Mg�Ti intermetallic alloy of the FCC phase, as well as the CNTs plane of (002). In thermal analysis, as the exothermic peak dropped from 355.1 °C to 346 °C, in the same way that the activation energy dropped from 277.38 kJ/mol to 82.7 kJ/mol. The cyclic voltammetry examination of the Mg�Ti alloy with 4 wt MWCNT added reveals a distinct anodic peak at �0.54 V. The calculated Cdl value for the Mg67Ti29MWCNT4 alloy in the impedance spectroscopy investigation is 2.372 F. Following the addition of MWCNT to the Mg�Ti alloy, the CR rate similarly decreased from 0.1728 to 0.1614 mgpy. Higher absorption capacity of 815 mAhg�1 and very long stable cycle life is demonstrated by the 4 wt MWCNT added Mg�Ti. © 2024 Hydrogen Energy Publications LLC

Item Type:	Journal Article
Publication:	International Journal of Hydrogen Energy
Publisher:	Elsevier Ltd
Additional Information:	The copyright for this article belongs to Elsevier Ltd.
Keywords:	Activation analysis; Activation energy; Cyclic voltammetry; Hydrides; Hydrogen storage alloys; Magnesium; Magnesium alloys; Mechanical alloying; Multiwalled carbon nanotubes (MWCN); Thermoanalysis; Titanium alloys, And desorption; Carbon allotropes; Hydrogen storage capacities; Metal-hydrides; Mg-Ti alloys; Multi-walled-carbon-nanotubes; MWCNT's; Raman analysis; Synthesised; XRD, Hydrogen storage
Department/Centre:	Division of Chemical Sciences > Materials Research Centre Division of Physical & Mathematical Sciences > Physics
Date Deposited:	09 Jul 2024 06:45
Last Modified:	09 Jul 2024 06:45
URI:	http://eprints.iisc.ac.in/id/eprint/84758

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