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ReaxFF molecular dynamics simulations on the structure and dynamics of electrolyte water systems at ambient temperature (uncorrected proof)

Summary

This slug registers an uncorrected proof PDF (papers/Nabankur_CompMatSci_electrolyte_ambient_proof.pdf) for the Computational Materials Science article (DOI 10.1016/j.commatsci.2019.109349) reporting ambient-temperature ReaxFF molecular dynamics of aqueous alkali halides—LiCl, NaCl, and KCl at 1–5 M—together with pure water baselines, using the Fedkin electrolyte–water parameterization line developed in the group’s broader ReaxFF ecosystem. Adri C. T. van Duin co-authorship connects the study to PSU reactive electrolyte practice and to downstream wiki links such as 2019fedkin-j-phys-chem-development-reaxff and batteries-interfaces-reaxff. Scientifically, the work interrogates structure and dynamics signatures—radial distribution functions, hydrogen-bond statistics, reorientational correlation functions, ion–water residence behavior, and diffusion trends—as functions of salt identity and concentration, comparing selectively to ab initio and non-reactive references cited in the paper. Because proof PDFs can differ in pagination, typesetting, and watermarking, the authoritative narrative for this knowledge base is maintained on 2019dasgupta-computationa-reaxff-molecular, which tracks the version-of-record PDF bytes.

Methods

This page tracks the uncorrected proof papers/Nabankur_CompMatSci_electrolyte_ambient_proof.pdf for the same DOI as 2019dasgupta-computationa-reaxff-molecular. The VOR MD protocol on the sibling page uses LAMMPS with the Fedkin-line ReaxFF for 1–5 M LiCl/NaCl/KCl in 3D periodic simulation cells. System / composition (VOR): ~700 H₂O molecules plus salt (order 10³ atoms in the electrolyte box) or ~1000 H₂O (pure water baseline); exact atom totals and ion counts per concentration are tabulated on 2019dasgupta-computationa-reaxff-molecular. Sampling temperature is 300 K (ambient NVT) after minimization/heating/equilibration, with 0.25 fs timestep and 0.5 ns trajectories and analysis on the last 200 ps (see VOR for thermostat/damping and full RDF/H-bond/diffusivity work-up). Reproduce all settings from 2019dasgupta-computationa-reaxff-molecular, not from the proof PDF alone. Mean isotropic pressure control in NPT: N/A on the quoted ambient NVT protocol; Hydrostatic stress as a lumped control is N/A unless the VOR NPT stages exist (they do not in the NVT line we mirror). Barostat during the NVT hold: N/A. External electric field: N/A. Umbrella / metadynamics: N/A — unbiased NVT in the parent work.

Findings

The published conclusions—fully summarized on 2019dasgupta-computationa-reaxff-molecular—emphasize that ReaxFF reproduces key structural features of alkali chloride solutions in the modeled concentration window and rationalizes transport trends using time-series chemistry not accessible to fixed-charge models. The authors relate species fluctuations—including metal–hydroxide/chloride motifs—to diffusivity changes and argue that increasing salt concentration reduces water self-diffusivity without the strongest ion-specific splitting suggested by some simplified pictures. For this proof-ingest page, the wiki does not duplicate every table entry; readers should use the VOR PDF for final edited text, pagination, and SI cross-links. Battery- and interface-themed retrieval should still prefer 2019dasgupta-computationa-reaxff-molecular for stable locators tying transport numbers to Fedkin parameter choices and simulation protocol details.

Limitations

Uncorrected proofs are non-authoritative for exact page locators and may include publisher boilerplate; hashes and paths remain useful for manifest provenance but should not replace the VOR record for citations. Sub-nanosecond segments and finite-size effects inherit limitations discussed on the primary page.

Relevance to group

van Duin-group electrolyte–water ReaxFF application built on Fedkin parameterization; duplicate ingest for proof provenance.

Citations and evidence anchors

Reader notes (navigation)