Author
Chhagan Lal
Other affiliations: Okinawa Institute of Science and Technology, AREA Science Park, International Centre for Theoretical Physics ...read more
Bio: Chhagan Lal is an academic researcher from University of Rajasthan. The author has contributed to research in topics: Thin film & Band gap. The author has an hindex of 10, co-authored 37 publications receiving 1197 citations. Previous affiliations of Chhagan Lal include Okinawa Institute of Science and Technology & AREA Science Park.
Papers
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TL;DR: In this article, the hydrogen storage in metal hydrides with particular interest in Mg as it has potential to become one of the most promising storage materials, and the possibility of commercialization of Mg based alloys has been discussed.
922 citations
TL;DR: In this article, Modified Hummer's method was adopted for synthesis of graphene oxide (GO) and reduced-graphene oxide (rGO), and the hydrogen storage capacity of the GO/rGO sample was measured using indigenously fabricated high pressure hydrogen storage Sieverts' type volumetric setup at room temperature and pressure up to 80 bar.
88 citations
TL;DR: In this article, the effect of thickness on the physical properties of thermally evaporated cadmium selenide thin films was presented. And the as-deposited and annealed films were subjected to the XRD, UV-Vis spectrophotometer, source meter, SEM and EDS to find the structural, optical, electrical, morphological and compositional analysis respectively.
62 citations
TL;DR: In this article, the effect of TiF 4 additive on the hydrogen sorption properties of MgH 2 was investigated and it was observed that the hydrogen carbonation kinetics is markedly improved by adding TiF4 additive.
59 citations
TL;DR: In this article, temperature induced optical and structural properties of thermally evaporated CdTe thin films have been investigated for optical, structural, electrical, morphological and elemental analysis.
51 citations
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TL;DR: In this paper, a brief review of hydrogen as an ideal sustainable energy carrier for the future economy, its storage as the stumbling block as well as the current position of solid-state hydrogen storage in metal hydrides and makes a recommendation based on the most promising novel discoveries made in the field in recent times which suggests a prospective breakthrough towards a hydrogen economy.
1,440 citations
TL;DR: In this article, a review of the latest developments of metal hydrides for solid-state hydrogen storage applications is presented, which will be of interest to scientists, researchers, and practitioners in this field.
661 citations
TL;DR: In this paper, an overview of all systems including the current research and potential benefits and issue are provided in the present paper, and a lot of research is invested in finding a compact, safe, reliable, inexpensive and energy efficient method of H2 storage.
655 citations
TL;DR: In this article, the authors present the latest status of PEM fuel cell technology development and applications in the portable and transportation power through an overview of the state of the art and most recent technological advances, and describe materials and water/thermal transport management for fuel cell design and operational control.
627 citations
TL;DR: The synthesis of an air-stable composite material that consists of metallic Mg nanocrystals (NCs) in a gas-barrier polymer matrix that enables both the storage of a high density of hydrogen and rapid kinetics and nanostructuring of the Mg provides rapid storage kinetics without using expensive heavy-metal catalysts.
Abstract: Hydrogen is a promising alternative energy carrier that can potentially facilitate the transition from fossil fuels to sources of clean energy because of its prominent advantages such as high energy density (142 MJ kg(-1); ref. 1), great variety of potential sources (for example water, biomass, organic matter), light weight, and low environmental impact (water is the sole combustion product). However, there remains a challenge to produce a material capable of simultaneously optimizing two conflicting criteria--absorbing hydrogen strongly enough to form a stable thermodynamic state, but weakly enough to release it on-demand with a small temperature rise. Many materials under development, including metal-organic frameworks, nanoporous polymers, and other carbon-based materials, physisorb only a small amount of hydrogen (typically 1-2 wt%) at room temperature. Metal hydrides were traditionally thought to be unsuitable materials because of their high bond formation enthalpies (for example MgH(2) has a ΔHf~75 kJ mol(-1)), thus requiring unacceptably high release temperatures resulting in low energy efficiency. However, recent theoretical calculations and metal-catalysed thin-film studies have shown that microstructuring of these materials can enhance the kinetics by decreasing diffusion path lengths for hydrogen and decreasing the required thickness of the poorly permeable hydride layer that forms during absorption. Here, we report the synthesis of an air-stable composite material that consists of metallic Mg nanocrystals (NCs) in a gas-barrier polymer matrix that enables both the storage of a high density of hydrogen (up to 6 wt% of Mg, 4 wt% for the composite) and rapid kinetics (loading in <30 min at 200 °C). Moreover, nanostructuring of the Mg provides rapid storage kinetics without using expensive heavy-metal catalysts.
562 citations