Supporting Information: Effect of electrode/electrolyte coupling on birnessite (δ-MnO2) mechanical response and degradation
Corpus note
The checked-in PDF is Supporting Information for an ACS Applied Materials & Interfaces study on birnessite (δ-MnO₂). The main article PDF is not represented as a separate primary file in this slice; methods and findings below are limited to what the SI extract documents.
Summary¶
This entry documents Supporting Information for work on electrode/electrolyte coupling, mechanical response, and degradation of birnessite (δ-MnO₂) in a sulfate electrolyte context, with Penn State co-authorship including Adri C. T. van Duin. The SI package is treated here as ancillary to the parent ACS Applied Materials & Interfaces article: it supplies figure-level workflows for scanning-probe data processing rather than standalone conclusions about capacitance or long-term electrochemical cycling, which require the main text and full figure set.
Methods¶
Corpus role (SI-focused ingest)¶
Supports [[20230000-0002-4731-7051-x-effect-electrolyte]] (birnessite AFM/mechanics story) with Supporting Information analysis detail.
mCV / k-means workflow (data processing)¶
Figure S1: topography + k-means (3 clusters) on topography and mCV maps; subtracted k-means map; height extraction with thermal drift correction; pixel masks along x/y.
N/A (LAMMPS, ReaxFF, NPT, E-field, metadynamics). This SI supports SPM data processing (k-means on topography and mCV), not an atomistic RMD or static DFT study—N/A for thermostat time constants, PBC cell sizes, or E-field RMD on this page. The front matter has no doi because the parent ACS Appl. Mater. Interfaces article is not yet the canonical cite for this work—ingest the VOR parent to anchor doi and full Methods/Findings.
Findings¶
The SI figure caption states that k-means segmentation separates regions in both topographic and mCV channels and that subtracting cluster maps highlights coupled structure–activity contrasts; non-zero pixel counts versus spatial offset quantify how sensitive the extracted mCV features are to alignment. Together, these processing steps are presented as a way to co-register mechanical and conductivity maps when thermal drift and line-by-line scanning artifacts complicate simple height–current overlays. Full quantitative conclusions about electrochemical degradation require the main article text and figures, which are not in the current extract.
Limitations¶
Only the first pages of Supporting Information are captured in extracts bundled for this slug; no DOI is recorded in the normalized bibliography stub, and primary-article PDF text is not in the corpus slice used here. Operators should treat this page as a navigation record for SI-specific workflows until the parent article PDF is ingested alongside a complete bibliography update. External citations of scientific claims should use the journal version-of-record for birnessite electrochemistry, not this SI fragment alone.
Relevance to group¶
Co-authorship links the work to interfacial electrochemistry and multimodal scanning-probe characterization relevant to energy materials workflows in the broader collaboration.
Citations and evidence anchors¶
Prefer the version-of-record DOI for the parent article when citing scientific claims; use this page for SI-specific procedural notes only.