An investigation on the structural and electrochemical properties of La0.7Mg0.3(Ni0.85Co0.15)x (x=3.15–3.80) hydrogen storage electrode alloys
TL;DR: In this paper, the structural and electrochemical properties of the La0.7Mg0.3(Ni0.85Co0.15)x (x=3.15, 3.30), 3.65,3.50, and 3.80) hydrogen storage electrode alloys have been studied systematically.
About: This article is published in Journal of Alloys and Compounds.The article was published on 2003-03-10. It has received 146 citations till now. The article focuses on the topics: Hydrogen storage & Exchange current density.
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TL;DR: In this article, a review is devoted to new rare earth-Mg-Ni-based (RmGNi-Ni)-based hydrogen storage alloys that have been developed over the last decade as the most promising next generation negative electrode materials for high energy and high power Ni/MH batteries.
255 citations
TL;DR: In this paper, a comprehensive overview of metal-organic framework (MOF)-derived nanocomposites as HER electrocatalysts for water splitting is provided, with special emphasis on the component manipulation of the TMs/TMCs, carbon matrix modifications, morphology tuning and electrode configuration engineering.
172 citations
08 Oct 2018
TL;DR: Li and Mn-rich layered oxides (LMRO) have drawn much attention for application as cathode materials for lithium-ion batteries due to their high energy density of over 1000 W h kg−1 as discussed by the authors.
Abstract: Li- and Mn-rich layered oxides (LMRO) have drawn much attention for application as cathode materials for lithium-ion batteries due to their high-energy density of over 1000 W h kg−1 However, several issues and challenges need to be overcome before realizing the commercialization of LMRO cathode materials, including their disputed crystal structure, ambiguous reaction mechanism, high initial irreversible capacity, poor cycle life, fast voltage fading, and poor rate capability In this paper, we systematically review the development history, elaborate the fundamentals and demonstrate the latest research advances in LMRO cathode materials Furthermore, the applications of LMRO cathode materials and their related key technical issues in full-cells, as well as the prospects for future research are also discussed
121 citations
TL;DR: In this paper, major progress towards the practical use of magnesium as a hydrogen carrier is reviewed with a stress on the multi-strategy modifying techniques, including catalyzing, nanosizing, alloying, surface modification, amorphization and compositing.
108 citations
References
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TL;DR: The science and technology of a nickel metal hydride battery, which has high energy density, high power, long life, tolerance to abuse, a wide range of operating temperature, quick-charge capability, and totally sealed maintenance-free operation, is described.
Abstract: Widespread use of electric vehicles can have significant impact on urban air quality, national energy independence, and international balance of trade. An efficient battery is the key technological element to the development of practical electric vehicles. The science and technology of a nickel metal hydride battery, which stores hydrogen in the solid hydride phase and has high energy density, high power, long life, tolerance to abuse, a wide range of operating temperature, quick-charge capability, and totally sealed maintenance-free operation, is described. A broad range of multi-element metal hydride materials that use structural and compositional disorder on several scales of length has been engineered for use as the negative electrode in this battery. The battery operates at ambient temperature, is made of nontoxic materials, and is recyclable. Demonstration of the manufacturing technology has been achieved.
536 citations
TL;DR: In this article, the hydrogen storage properties of the new ternary system alloys, La2MgNi9, La5Mg2Ni23, La3mgNi14, and La0.7Mg0.8Co0.5, were investigated.
516 citations
TL;DR: In this paper, the performance of a metal hydride electrode is determined by both the kinetics of the processes occurring at the metal/electrolyte interface and the rate of hydrogen diffusion within the bulk of the metal.
Abstract: Metal hydrides are being used as electrodes in nickel/metal-hydride batteries because of their ability to store large quantities of hydrogen and because of their many advantages over conventional lead-acid and nickel-cadmium batteries. The performance of a metal hydride electrode is determined by both the kinetics of the processes occurring at the metal/electrolyte interface and the rate of hydrogen diffusion within the bulk of the metal. The constant potential and constant current discharge techniques were used to determine the hydrogen diffusion coefficients in an LaNi{sub 4.25}Al{sub 0.75} electrode. The values obtained were 2.97 {times} 10{sup {minus}11} and 3.30 {times} 10{sup {minus}11} cm{sup 2}/s, respectively. The advantages and disadvantages of these two techniques are discussed.
478 citations
TL;DR: In this paper, Electrochemical impedance spectroscopy (EIS) was applied to metal hydride electrodes to investigate the deterioration of metal hydide electrodes using a mischmetal-based alloy, MmNi 3.5 Co 0.7 Al 0.8, using EIS.
471 citations
TL;DR: In this article, a brief historical survey is given of how the study of coercitivity mechanisms in SmCo5 permanent-magnet materials eventually led to the discovery of the favorable hydrogen sorption properties of the compound LaNi5.
Abstract: A brief historical survey is given of how the study of coercitivity mechanisms in SmCo5 permanent-magnet materials eventually led to the discovery of the favourable hydrogen sorption properties of the compound LaNi5. It is shown how continued research by many investigators dealing with a variety of different physical and chemical properties has resulted in an advanced understanding of some of the principles that govern hydrogen absorption and which are responsible for the changes in physical properties that accompany it. The problems associated with various applications of LaNi5-based hydrogen-storage materials are also briefly discussed. A large part of this paper is devoted to the applicability of LaNi5-type materials in batteries. Research in this area has resulted in the development of a new type of rechargeable battery: the nickel-hydride cell. This battery can be charged and discharged at high rates and is relatively insensitive to overcharging and overdischarging. Special attention is given to the nature of the electrode degradation process and the effect of composition variations in LaNi5-related materials on the lifetime of the corresponding hydride electrodes when subjected to severe electrochemical charge-discharge cycles.
409 citations