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Atomic insight into the lithium storage and diffusion mechanism of SiO2/Al2O3 electrodes of lithium ion batteries: ReaxFF reactive force field modeling

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Authority of statements

This slug registers a publisher proof PDF for J. Phys. Chem. A (DOI in front matter). Narrative content matches [[2016ostadhossein-venue-jp-2015-119086]]; prefer the version-of-record PDF for citation unless you are documenting proof-specific layout.

Summary

The article develops a ReaxFF parametrization for Li–Si–O–Al chemistry to describe lithium insertion, reaction, and transport in silica and alumina environments relevant to oxide-coated silicon anodes in lithium-ion batteries. The scientific goal is atomistic insight into how ALD-style oxide coatings can modify lithiation stress and interfacial chemistry compared with bare Si, including diffusion anisotropy in crystalline silica and transferability toward amorphous silica representations.

The work combines hybrid GCMC + MD (as summarized on related pages) to insert Li and study subsequent dynamics, reporting diffusion behavior and thermodynamic driving forces for lithiation in model oxide phases. Discussion ties oxide coatings to volume buffering, SEI-adjacent chemistry, and mechanical protection motifs discussed in LIB anode engineering.

Methods

This slug registers a publisher proof PDF for the same J. Phys. Chem. A article as 2016ostadhossein-venue-jp-2015-119086 (DOI 10.1021/acs.jpca.5b11908). The scientific protocol matches the version-of-record page: ReaxFF reparameterization for Li–Si–O–Al from DFT data on clusters, surfaces, and condensed phases; hybrid GCMC + MD to change lithium loading in crystalline and amorphous silica; NVT/NPT segments for diffusivity (including anisotropic crystalline channels); and larger cells with alumina-bearing regions for coating–silicon coupling. The MD workflow mirrors the issue article: periodic supercells with PBC, hybrid GCMC/MD lithium insertion, 300 K diagnostics such as 250 ps NVT RDF sampling, NPT densification at P = 0, 1 ns melt–quench preparation of glassy silica, and NEMD tensile tests on 3000-atom cells—see 2016ostadhossein-venue-jp-2015-119086 for the same numerical narrative. N/A — MD engine name in this proof-PDF text — treat LAMMPS/package choices as on the version-of-record page. N/A — explicit fs timestep and thermostat coupling constants in this proof-PDF text layer — copy integrator and thermostat settings from the issue PDF/SI when reproducing. N/A — applied electric field; umbrella / metadynamics / replica exchange as the primary workflow. DFT supports parametrization rather than replacing large-cell reactive dynamics.

Findings

The fitted field is reported to reproduce DFT-level trends for Li site preferences and migration behavior in silica, including anisotropic diffusion in crystalline channels versus more isotropic hopping in disordered amorphous matrices, and to support discussion of how oxide coatings can throttle or redirect Li flux toward the Si active material. Interface models illustrate stress pathways during lithiation cycles. For numerical diffusivities, insertion isotherms, and barrier values, cite figures/tables on [[2016ostadhossein-venue-jp-2015-119086]]; this proof-ingest page does not duplicate those values.

Limitations

Proof PDFs can differ slightly from final pagination. Real ALD microstructures are reduced to tractable oxide slab/cluster models; electrolyte and electrochemical polarization are not fully represented at the ReaxFF level used here.

When using this page for battery retrieval, pair it with [[2016ostadhossein-venue-jp-2015-119086]] for any claim about numerical diffusivities or insertion isotherms: this slug’s purpose is manifest provenance for the proof PDF bytes, while the canonical narrative should remain one authoritative page unless the wiki later deduplicates intentionally.

Relevance to group

van Duin-group contribution on ReaxFF for LIB oxide coatings; this slug records manifest provenance for the proof file.

From a knowledge-base maintenance perspective, keep diffusion tensors, insertion isotherms, and reaction statements synchronized with the VOR page so chunk text does not diverge across duplicate PDF registrations.

Citations and evidence anchors

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MAS / retrieval

Treat this entry as manifest-linked duplicate provenance: it exists so pdf_path/pdf_sha256 in normalized/ and chunk pipelines can point at the proof bytes without losing the scientific narrative on the VOR page.