Reactivity of TiH2 hydride with lithium ion: Evidence for a new conversion mechanism

Oumellal, Yassine; Zaïdi, Warda; Bonnet, Jean-Pierre; Cuevas, Fermín; Latroche, M.; Zhang, Junxian; Bobet, Jean-Louis; Rougier, Aline; Aymard, L.

doi:10.1016/j.ijhydene.2012.01.107

Cited by 62 publications

(43 citation statements)

References 14 publications

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“…This characteristic peak disappeared after 100 cycles at a scan rate of 50 mV s À1 in 0.5 m H 2 SO 4 , which is in agreement with TiH 2 having poor resistance to acid or oxidant. [23] We used X-ray photoelectron spectroscopy (XPS) to investigate the chemical composition and oxidation state of the TNTs. [23a] This indicates that the Ti has different bonding environments in the H-TNTs compared to the air-TNTs.…”

Section: Synthesis and Characterization Of H-tntsmentioning

confidence: 99%

Supported Noble Metals on Hydrogen‐Treated TiO₂ Nanotube Arrays as Highly Ordered Electrodes for Fuel Cells

Zhang

et al. 2013

ChemSusChem

102

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Hydrogen‐treated TiO2 nanotube (H–TNT) arrays serve as highly ordered nanostructured electrode supports, which are able to significantly improve the electrochemical performance and durability of fuel cells. The electrical conductivity of H–TNTs increases by approximately one order of magnitude in comparison to air‐treated TNTs. The increase in the number of oxygen vacancies and hydroxyl groups on the H–TNTs help to anchor a greater number of Pt atoms during Pt electrodeposition. The H–TNTs are pretreated by using a successive ion adsorption and reaction (SIAR) method that enhances the loading and dispersion of Pt catalysts when electrodeposited. In the SIAR method a Pd activator can be used to provide uniform nucleation sites for Pt and leads to increased Pt loading on the H‐TNTs. Furthermore, fabricated Pt nanoparticles with a diameter of 3.4 nm are located uniformly around the pretreated H–TNT support. The as‐prepared and highly ordered electrodes exhibit excellent stability during accelerated durability tests, particularly for the H–TNT‐loaded Pt catalysts that have been annealed in ultrahigh purity H2 for a second time. There is minimal decrease in the electrochemical surface area of the as‐prepared electrode after 1000 cycles compared to a 68 % decrease for the commercial JM 20 % Pt/C electrode after 800 cycles. X‐ray photoelectron spectroscopy shows that after the H–TNT‐loaded Pt catalysts are annealed in H2 for the second time, the strong metal–support interaction between the H–TNTs and the Pt catalysts enhances the electrochemical stability of the electrodes. Fuel‐cell testing shows that the power density reaches a maximum of 500 mW cm−2 when this highly ordered electrode is used as the anode. When used as the cathode in a fuel cell with extra‐low Pt loading, the new electrode generates a specific power density of 2.68 kW gPt−1. It is indicated that H–TNT arrays, which have highly ordered nanostructures, could be used as ordered electrode supports.

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Section: Synthesis and Characterization Of H-tntsmentioning

confidence: 99%

Supported Noble Metals on Hydrogen‐Treated TiO₂ Nanotube Arrays as Highly Ordered Electrodes for Fuel Cells

Zhang

et al. 2013

ChemSusChem

102

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“…Conversion-type anodes are interesting for Li-ion batteries and beyond (Na-ion, Mg and redox flow batteries) as they demonstrate superior capacities and novel chemistries which are different from the well-known intercalation systems [1][2][3][4][5][6][7]. MgH 2 as anode reacts with 2Li + in a conversion reaction, leading to the formation of Mg and precipitation of 2LiH with a high theoretical capacity of 2037 mAh.g -1 (compared to graphite-anode 372 mAh.g -1 ) and the lowest charge-discharge polarization of any tested conversion-type material [2,8].…”

Section: Introductionmentioning

confidence: 99%

Morphology effects in MgH2 anode for lithium ion batteries

Kharbachi

Andersen

Sørby

et al. 2017

International Journal of Hydrogen Energy

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In order to acquire reproducible electrodes relevant for Li ion batteries new MgH 2 electrodes are successfully obtained from homogenous slurries in N-Methyl-2-Pyrrolidone "NMP" solvent. The electrodes are aimed to elucidate the contribution of the cell components to the electrochemical cycling, in terms of morphology and composition. Various electrode preparations were tested and compared regarding their interaction with Li in a half-cell. The obtained electrochemical cycling curves are discussed according to the ball-milling-induced structural morphology changes and presence of carbon additives, along with the effect of the kinetic rate on the conversion reaction mechanism.

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“…The electrochemical Li insertion/extraction mechanism of TiH 2 was reported by Oumellal et al 9,10) . However, the cycle properties have not been reported yet due to the poor reversibility in conventional organic liquid based electrolyte.…”

Section: Introductionmentioning

confidence: 85%

Electrochemical Performance of Titanium Hydride for Bulk-Type All-Solid-State Lithium-Ion Batteries

et al. 2016

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TiH 2 was utilized as a negative electrode material for lithium ion battery by using LiBH 4 solid electrolyte. High reversibility of the TiH 2 conversion reaction was successfully obtained in this work. The favorable electrochemical properties of TiH 2 electrode such as robust cyclic and rate performances were reported for the rst time, which are superior to the previous report by means of conventional organic liquid electrolyte system. It can be considered as a promising candidate as negative electrode for lithium-ion batteries.

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Reactivity of TiH2 hydride with lithium ion: Evidence for a new conversion mechanism

Cited by 62 publications

References 14 publications

Supported Noble Metals on Hydrogen‐Treated TiO₂ Nanotube Arrays as Highly Ordered Electrodes for Fuel Cells

Supported Noble Metals on Hydrogen‐Treated TiO₂ Nanotube Arrays as Highly Ordered Electrodes for Fuel Cells

Morphology effects in MgH2 anode for lithium ion batteries

Electrochemical Performance of Titanium Hydride for Bulk-Type All-Solid-State Lithium-Ion Batteries

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Reactivity of TiH2 hydride with lithium ion: Evidence for a new conversion mechanism

Cited by 62 publications

References 14 publications

Supported Noble Metals on Hydrogen‐Treated TiO2 Nanotube Arrays as Highly Ordered Electrodes for Fuel Cells

Supported Noble Metals on Hydrogen‐Treated TiO2 Nanotube Arrays as Highly Ordered Electrodes for Fuel Cells

Morphology effects in MgH2 anode for lithium ion batteries

Electrochemical Performance of Titanium Hydride for Bulk-Type All-Solid-State Lithium-Ion Batteries

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Product

Resources

About

Supported Noble Metals on Hydrogen‐Treated TiO₂ Nanotube Arrays as Highly Ordered Electrodes for Fuel Cells

Supported Noble Metals on Hydrogen‐Treated TiO₂ Nanotube Arrays as Highly Ordered Electrodes for Fuel Cells