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audit/BATTERY_AUDIT.md
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# Battery Relevance Audit
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**Date:** 2026-07-21 23:35:52
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Battery-specific material families quantified below. This audit assesses how well Scandium-Dataset covers materials relevant to solid-state battery (SSB) research.
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## Battery Family Coverage
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| Family | Count | Percentage | Tier (Gold/Valid/Raw) |
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|--------|-------|------------|------------------------|
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| Layered Oxide | 42,015 | 15.8% | 26,295/12,756/2,964 |
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| Polyanion | 4,519 | 1.7% | 2,788/1,314/417 |
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| Sulfide SSE | 16,359 | 6.1% | 9,458/5,591/1,310 |
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| Halide SSE | 18,803 | 7.0% | 12,560/5,211/1,032 |
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| Garnet | 23 | 0.0% | 19/4/0 |
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| NASICON | 560 | 0.2% | 488/70/2 |
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| LISICON | 0 | 0.0% | 0/0/0 |
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| Perovskite SSE | 0 | 0.0% | 0/0/0 |
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| Antiperovskite SSE | 0 | 0.0% | 0/0/0 |
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| Hydroborate SSE | 0 | 0.0% | 0/0/0 |
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| Borohydride | 646 | 0.2% | 486/116/44 |
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| Oxide | 11,928 | 4.5% | 5,715/4,364/1,849 |
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## Known Solid Electrolyte Families
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- **LLZO-type** (garnet): 23 entries (19 Gold)
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- **NASICON** (nasicon): 560 entries (488 Gold)
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- **LISICON** (lisicon): 0 entries (0 Gold)
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- **Sulfide** (sulfide_sse): 16,359 entries (9,458 Gold)
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- **Halide** (halide_sse): 18,803 entries (12,560 Gold)
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- **Perovskite** (perovskite_sse): 0 entries (0 Gold)
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- **Antiperovskite** (antiperovskite_sse): 0 entries (0 Gold)
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- **Hydroborate** (hydroborate_sse): 0 entries (0 Gold)
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## Li/Na/Mg Carrier Statistics
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| Carrier | Entries | Gold |
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|---------|---------|------|
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| Li | 120,644 | 30,833 |
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| Na | 71,483 | 17,362 |
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| Mg | 110,943 | 17,002 |
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| K | 60,450 | 12,410 |
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| Ca | 57,981 | 12,078 |
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| Zn | 80,337 | 12,804 |
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## Electrolyte Subset
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**Electrolyte subset:** 41,665 entries (strict Gold, no OQMD)
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## Battery Subset
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**Battery subset:** 82,925 entries
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