Data · dataset · 2025
Dissolution of Molybdenum Current Collector as Crucial and Undesired Process in Aluminum Batteries
Listed in RADAR and RADAR4Memory — shown once because both records carry DOI 10.35097/pjv694w34gzkjdyr
Rechargeable aluminum batteries (RABs) using Lewis acidic aluminum chloride–1-ethyl-3-methylimidazolium chloride (AlCl3-EMImCl) ionic liquid electrolytes are promising alternative energy storage systems.
Description
Molybdenum (Mo), often used as a current collector, is typically considered stable with negligible redox activity in such electrolytes. However, this study shows that Mo reacts with AlCl3-EMImCl (1.5:1) electrolyte.
When Mo-foil or powder is im-mersed, the initially colorless/yellowish ionic liquid turns red, indicating Mo dissolution. Magnetometry confirms the presence of Mo species with localized unpaired electrons in the red liquid, not found in metallic Mo. UV-VIS spec-troscopy reveals Mo3+ and Mo4+ species formation.
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ICP-OES shows 1.99±0.06 mass-% of Mo dissolves in the electro-lyte. Due to Mo’s instability, cyclic voltammetry (CV) and galvanostatic cycling with potential limitation (GCPL) show increasing redox activity over cycles, similar to unstable Platinum (Pt), with a discharge capacity of ~136 mAh.g-1 at 20 mA.g−1 after 100 cycles. X-ray photoelectron spectroscopy (XPS) indicates three oxidation states of Mo (Mo4+/5+/6+) on the aluminum negative electrode, due to Mo-cation migration and adsorption.
Covering the Mo current collector with electrochemically inactive Co3O4 suppresses Mo reactivity by reducing active Mo surface area. These findings demonstrate Mo’s significant impact on AlCl3-based RABs’ electrochemical performance, which is not negligible.
Links
Where it is published
- DOI doi.org/10.35097/pjv694w34gzkjdyr ↗
DOI / persistent id · from radar service eu de
Catalogue records · 1
- OAI-PMH record radar-service.eu/oai/OAIHandler?verb=GetRecord&metadataPrefix=oai_dc&identifier… ↗
metadata API · from radar service eu de
Topics
- From keywords
- Earth & Environmental Science · Earth & Environmental Science · Engineering · Engineering
- Inferred from text
- Chemical engineering 68%
Provenance · 2 source records, 10 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| RADAR | 10.35097/pjv694w34gzkjdyr | 12 d ago | JSON v1 |
| RADAR4Memory | 10.35097/pjv694w34gzkjdyr | 12 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · radar service eu de | connector:radar_service_eu_de@1.0.0 | |
| concepts[field].anzsrc:group:4004 | enrichment · radar service eu de | taxonomy-embedding@1.1.0 | title+keywords+description (68%) |
| concepts[field].local:field:earth-environmental | mapping · radar service eu de | connector:radar_service_eu_de@1.0.0 | |
| concepts[field].local:field:earth-environmental | mapping · radar4memory radar service eu | connector:radar4memory_radar_service_eu@1.0.0 | |
| concepts[field].local:field:engineering | mapping · radar service eu de | connector:radar_service_eu_de@1.0.0 | |
| concepts[field].local:field:engineering | mapping · radar4memory radar service eu | connector:radar4memory_radar_service_eu@1.0.0 | |
| description | source · radar service eu de | connector:radar_service_eu_de@1.0.0 | /metadata/dc/description |
| license | source · radar service eu de | connector:radar_service_eu_de@1.0.0 | /metadata/dc/rights |
| publication_date | source · radar service eu de | connector:radar_service_eu_de@1.0.0 | |
| title | source · radar service eu de | connector:radar_service_eu_de@1.0.0 | /metadata/dc/title |