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Stable metal anodes enabled by a labile organic molecule bonded to a reduced graphene oxide aerogel (duplicate PDF)

This wiki entry tracks a second ingested PDF path for the same PNAS article (DOI 10.1073/pnas.2001837117) on benzenesulfonyl fluoride (BSF) on reduced graphene oxide aerogel for Li, Na, and Zn anodes. Narrative and evidence anchors match 2020gao-venue-stable-metal; use that page for the canonical pdf_path unless you specifically need this filename/hash.

Summary

The work addresses dendritic plating and unstable SEI by grafting an electrochemically labile BSF moiety to a conductive rGO aerogel. Operation generates sulfonate-containing fragments that steer ion flux, while fluoride-contributing chemistry supports LiF-rich passivation. Li||LiCoO\(_2\) cycling, high-rate Li plating, and sub-zero behavior are reported alongside Na and Zn demonstrations. Computation in the article emphasizes DFT/continuum-style support rather than ReaxFF MD. The full PNAS narrative on rational interphase design—linking molecular graft chemistry to microstructural evidence in cryo-electron imaging—is curated on 2020gao-venue-stable-metal; this entry exists to preserve provenance for the alternate papers/... filename registered for the same publication.

Methods

Aligned with 2020gao-venue-stable-metal: BSF-functionalized rGO hosts vs controls; electrochemical plating/stripping and full cells; cryo/HR-TEM, XPS, EIS, SEM as in the paper. This duplicate slug only differs by pdf_path / pdf_sha256 in the manifest. When citing figure or page locators, prefer the canonical wiki page unless this path is the only local PDF available in your checkout.

Findings

  • Lower nucleation overpotential and sustained Coulombic efficiency at 6.0 mA cm\(^{-2}\) Li plating (conditions in the article).
  • Li||LiCoO\(_2\) ~85.3% capacity after 400 cycles under stated loadings.
  • −10 °C tests report no extra fade vs room-temperature baselines in the authors’ comparison.
  • Na and Zn cells show qualitatively similar stabilization with the same molecular strategy.
  • The authors position the organic–inorganic hybrid interphase as a general handle for alkali and multivalent anodes beyond a single metal chemistry, which motivates cross-linking to broader interface theme pages in the KB.

Limitations

Maintaining two byte-level PDF registrations risks narrative drift—edit both slugs or merge when policy allows. Prefer the primary wiki page for bibliographic consistency unless this path is the only local blob.

Relevance to group

van Duin-group coauthorship on rational SEI design via surface-bound reactive molecules for metal anodes; this slug is provenance for the alternate PDF filename.

Citations and evidence anchors

Reader notes (navigation)

  • Canonical curated page: 2020gao-venue-stable-metal.
  • Duplicate PDF registration: this slug exists because the manifest records a second byte-identical or parallel article PDF path for the same DOI; maintain narrative alignment with the canonical page. Maintainer context for non-primary or alternate corpus PDF roles: Non-primary article PDF slugs (GitHub).