Modelling of rechargeable NiMH batteries

Ledovskikh, A Alexander; Verbitskiy, Evgeny; Ayeb, A; Notten, Phl Peter

doi:10.1016/s0925-8388(03)00082-3

Cited by 21 publications

(21 citation statements)

References 11 publications

(13 reference statements)

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“…The relationship between the Gibbs free energy and the partial hydrogen pressure can be represented by 4,12 ⌬G MH = kT 2 ln…”

Section: B Energy Descriptionmentioning

confidence: 99%

“…͑10͒. The relationship between the Gibbs free energy of the electrochemical reaction and E MH eq is given by 3,4,12 …”

Section: B Energy Descriptionmentioning

confidence: 99%

“…12,28,29 Both Eqs. ͑29͒ and ͑30͒ are, in principle, discontinuous at the phase transition points x ␣ and x ␤ .…”

Section: ͑25͒mentioning

confidence: 99%

“…1͑a͒ and 1͑b͒, respectively. [8][9][10][11][12] During hydrogen absorption at low concentrations, a solid solution is formed, which is generally denoted as the ␣ phase. In this concentration region, the partial hydrogen pressure ͑P H 2 eq ͒ is clearly dependent on the amount of stored hydrogen.…”

Section: Introductionmentioning

confidence: 99%

“…During hydrogen absorption both the equilibrium electrode potential ͑E MH eq ͒ and P H 2 eq are changing. Equation ͑3͒ describes the fundamental relationship between these two parameters 4,12 FIG. 1.…”

Section: Introductionmentioning

confidence: 99%

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Modeling of hydrogen storage in hydride-forming materials: Statistical thermodynamics

Ledovskikh

Danilov²,

Rey³

et al. 2006

Phys. Rev. B

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A new lattice gas model has been developed, describing the hydrogen storage in hydride-forming materials. This model is based on the mean-field theory and Bragg-Williams approximation. To describe first-order phase transitions and two-phase coexistence regions, a binary alloy approach has been adopted. A complete set of equations describing pressure-composition isotherms and equilibrium electrode potential curves of hydride forming materials in both solid-solution and two-phase coexistence regions has been set up. The proposed model defines both the equilibrium pressure and equilibrium potential as explicit functions of the normalized hydrogen concentration, using eight physically well-defined parameters. Gibbs free energies, entropies, and phase diagrams of both model ͑LaNi y Cu 1.0 ͒ and commercial, MischMetal-based, AB 5 -type materials at different compositions and temperatures have been simulated. Good agreement between experimental and theoretical results for the pressure-composition isotherms obtained in the gas phase and the equilibrium potential curves measured in electrochemical environment has been found in all cases.

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“…The relationship between the Gibbs free energy and the partial hydrogen pressure can be represented by 4,12 ⌬G MH = kT 2 ln…”

Section: B Energy Descriptionmentioning

confidence: 99%

“…͑10͒. The relationship between the Gibbs free energy of the electrochemical reaction and E MH eq is given by 3,4,12 …”

Section: B Energy Descriptionmentioning

confidence: 99%

“…12,28,29 Both Eqs. ͑29͒ and ͑30͒ are, in principle, discontinuous at the phase transition points x ␣ and x ␤ .…”

Section: ͑25͒mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Modeling of hydrogen storage in hydride-forming materials: Statistical thermodynamics

Ledovskikh

Danilov²,

Rey³

et al. 2006

Phys. Rev. B

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A Covalent Organic Framework as a Long‐life and High‐Rate Anode Suitable for Both Aqueous Acidic and Alkaline Batteries

et al. 2023

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Aqueous rechargeable batteries are prospective candidates for large-scale grid energy storage. However, traditional anode materials applied lack acid-alkali co-tolerance. Herein, we report a covalent organic framework containing pyrazine (C=N) and phenylimino (À NHÀ ) groups (HPP-COF) as a long-cycle and high-rate anode for both acidic and alkaline batteries. The HPP-COF's robust covalent linkage and the hydrogen bond network between À NHÀ and water molecules collectively improve the acid-alkaline co-tolerance. More importantly, the hydrogen bond network promotes the rapid transport of H + /OH À by the Grotthuss mechanism. As a result, the HPP-COF delivers a superior capacity and cycle stability (66.6 mAh g À 1 @ 30 A g À 1 , over 40000 cycles in 1 M H 2 SO 4 electrolyte; 91.7 mAh g À 1 @ 100 A g À 1 , over 30000 cycles @ 30 A g À 1 in 1 M NaOH electrolyte). The work opens a new direction for the structural design and application of COF materials in acidic and alkaline batteries.

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Primary estimation of metal hydride electrode performance

Saldan

2009

J Solid State Electrochem

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Modelling of rechargeable NiMH batteries

Cited by 21 publications

References 11 publications

Modeling of hydrogen storage in hydride-forming materials: Statistical thermodynamics

Modeling of hydrogen storage in hydride-forming materials: Statistical thermodynamics

A Covalent Organic Framework as a Long‐life and High‐Rate Anode Suitable for Both Aqueous Acidic and Alkaline Batteries

Primary estimation of metal hydride electrode performance

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