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Stress effects on the initial lithiation of crystalline silicon nanowires: reactive molecular dynamics simulations using ReaxFF

Summary

Silicon anodes for lithium-ion batteries undergo large volume expansion and stress during lithiation, motivating atomistic models that connect mechanical load to early-stage Li insertion pathways. This PCCP article (Harvard/Kaxiras and Penn State collaboration; Adri C. T. van Duin coauthor) applies ReaxFF reactive molecular dynamics to initial lithiation of crystalline silicon nanowires under controlled mechanical stress, examining how stress couples to Li ingress, phase evolution, and fracture propensity at the nanoscale. Per docs/corpus/NON_PRIMARY_ARTICLE_PAPER_SLUGS.md, the corpus pdf_path here is a publisher proof PDF; a canonical sibling with the version-of-record article PDF is [[2015ostadhossein-physical-che-stress-effects]] (papers/Ostadhossein_PCCP_LiSi_2014.pdf). Use the VOR PDF for authoritative pagination, final figures, and numerical tables.

Methods

Grounding: papers/Ostadhossein_PCCP_LiSi_proof.pdf (publisher proof for Phys. Chem. Chem. Phys., DOI 10.1039/C4CP05198J) and normalized/extracts/2014ostadhossein-venue-rsc-cp_p1-2.txt (proof boilerplate + graphical-abstract lead only).

1 — MD application (atomistic dynamics)

The typeset article reports ReaxFF reactive molecular dynamics of initial lithiation in crystalline silicon nanowires under stress (Summary). On this slug, numerical MD protocol lines are not recoverable from the indexed extract.

  • Engine / code: ReaxFF MD (article subject); N/A — MD software not in proof boilerplate excerpt.
  • System size & composition: Si nanowire models with explicit Li insertion (Summary); N/A — atom counts/dimensions not in p1–2 text.
  • Boundaries / periodicity: N/A — not stated in the indexed proof excerpt.
  • Ensemble: N/A — not stated in the indexed excerpt (likely NVT/NPT variants in article—confirm in VOR PDF).
  • Timestep / duration / thermostat / barostat: N/A — not stated in the indexed excerpt.
  • Temperature: N/A — explicit set points not in the proof excerpt on file.
  • Pressure / stress: Mechanical stress control is the paper’s headline variable (Summary), but N/A — quantitative stress protocol not in p1–2 text.
  • Electric field: N/A — not stated.
  • Replica / enhanced sampling: N/A — not stated.

2 — Force-field training

N/A — application-focused ReaxFF study on this topic; any parameter lineage discussion belongs to the PCCP article body.

Canonical sibling (version of record)

Prefer [[2015ostadhossein-physical-che-stress-effects]] (papers/Ostadhossein_PCCP_LiSi_2014.pdf) for pagination, tables, and reproducible MD settings.

Findings

Outcomes and mechanisms

The manuscript (typeset) analyzes how stress modifies early lithiation in crystalline Si nanowires, including heterogeneous Li distribution and mechanical failure precursors in a reactive MD framing (Summary).

Comparisons and sensitivity

Stress state is the primary sensitivity axis at the level of this wiki summary; quantitative stress–strain–composition relationships must be taken from the VOR PDF, not the proof excerpt.

Corpus honesty

Proof PDF ingest + boilerplate-heavy extract: do not treat this slug as the authoritative source for numbers; use [[2015ostadhossein-physical-che-stress-effects]] for evidence-stable citations.

Limitations

Proof PDF ingest complicates copy-paste of tables; ReaxFF accuracy limits predictions at high Li content and for long-time diffusion; nanowire models omit binder, electrolyte, and SEI complexity.

Relevance to group

van Duin-coauthored PCCP contribution on Si anodes linking mechanics and lithiation—close to batteries-interfaces-reaxff.

Citations and evidence anchors

  • https://doi.org/10.1039/C4CP05198J — PCCP article (c4cp05198j).

Reader notes (navigation)

Reader notes (MAS / retrieval)

Prefer [[2015ostadhossein-physical-che-stress-effects]] for VOR-grounded citations; keep this slug for proof-PDF provenance.