Solid-State Electrolyte Ionic Conductivity Atlas: Measured Room-Temperature Li-Ion Conductivity
Key findings
- LGPS and Argyrodite lead. Their median compositions reach 4.5×10⁻³ S/cm and 1.6×10⁻³ S/cm; 81% and 59% of them clear 1 mS/cm.
- Anion chemistry splits the field. 42% of sulfides and selenides exceed 1 mS/cm, against 6% of oxides and 14% of halides.
- The workhorse oxides sit about a decade lower. Garnets (LLZO-type) have a median of 1.4×10⁻⁴ S/cm and NASICONs (LATP-type) 1.0×10⁻⁴ S/cm. Only 4% of garnets and 6% of NASICONs clear 1 mS/cm.
- Conductivity spans more than ten orders of magnitude, up to 2.8×10⁻² S/cm (Li9.54Si1.74P1.44S11.4Cl0.3O0.3). The lowest values, below about 10⁻¹² S/cm, are extrapolated to room temperature from high-temperature measurements.
Conductivity by structural family
Each dot is one composition at its room-temperature conductivity (log scale). The dark tick marks the family median; the dashed line is 1 mS/cm. Values below 10⁻¹³ S/cm (all room-temperature extrapolations) are drawn at the left edge. Family labels come from the OBELiX curators. Compositions without one are grouped at the bottom.
| Group | Compositions | Median σ | Middle 50% | Best σ | ≥ 1 mS/cm | Best composition |
|---|---|---|---|---|---|---|
| LGPS | 26 | 4.5×10⁻³ | 2.4×10⁻³ – 7.2×10⁻³ | 2.5×10⁻² | 81% | Li9.54Si1.74P1.44S11.7Cl0.3 |
| Argyrodite | 46 | 1.6×10⁻³ | 1.9×10⁻⁴ – 2.8×10⁻³ | 5.5×10⁻³ | 59% | Li6.7P0.3Ge0.7S5I |
| Garnet | 86 | 1.4×10⁻⁴ | 1.2×10⁻⁵ – 4.6×10⁻⁴ | 1.4×10⁻³ | 4% | Fe0.19La2.95Li5.57Zr2O12 |
| NASICON | 96 | 1.0×10⁻⁴ | 3.8×10⁻⁶ – 2.7×10⁻⁴ | 3.4×10⁻³ | 6% | Li1.2Ti1.8Al0.2P3O12 |
| Perovskite | 57 | 1.0×10⁻⁴ | 1.1×10⁻⁵ – 6.2×10⁻⁴ | 1.5×10⁻³ | 9% | La0.55Li0.45Ti0.9Al0.1O3 |
| Anti-perovskite | 4 | 1.1×10⁻⁵ | 2.6×10⁻⁶ – 1.9×10⁻⁴ | 2.5×10⁻² | 25% | Li3ClO |
| Other sulfide | 14 | 4.2×10⁻⁶ | 6.0×10⁻⁸ – 1.6×10⁻⁵ | 8.3×10⁻⁴ | 0% | Li5Zn0.5P2S8 |
| Thio-LISICON | 24 | 2.5×10⁻⁶ | 3.0×10⁻⁸ – 7.2×10⁻⁴ | 8.5×10⁻³ | 25% | Li10Ge0.95Si0.05P2S12 |
| Halide | 16 | 2.2×10⁻⁶ | 1.5×10⁻⁷ – 1.1×10⁻⁴ | 2.0×10⁻³ | 19% | Li3InCl6 |
| LISICON | 23 | 5.1×10⁻⁷ | 3.4×10⁻¹³ – 3.8×10⁻⁶ | 3.8×10⁻⁵ | 0% | Li14.8Ge3.4W0.6O16 |
| Hydride | 3 | 1.4×10⁻⁷ | 3.5×10⁻⁸ – 1.2×10⁻⁶ | 1.0×10⁻⁵ | 0% | Li12N8H16I4 |
| Nitride | 3 | 5.0×10⁻⁸ | 1.6×10⁻⁸ – 4.6×10⁻⁶ | 4.2×10⁻⁴ | 0% | Li3N |
| Other oxide | 23 | 1.5×10⁻⁹ | 3.8×10⁻¹¹ – 2.6×10⁻⁸ | 1.6×10⁻³ | 4% | Li8Ta16P8O64 |
| Other | 21 | 6.3×10⁻¹⁰ | 9.1×10⁻¹² – 8.1×10⁻⁷ | 1.2×10⁻⁴ | 0% | Li4.8Sn4.8S12 |
| No family label | 287 | 3.3×10⁻⁶ | 5.8×10⁻¹⁰ – 4.5×10⁻⁴ | 2.8×10⁻² | 16% | Li9.54Si1.74P1.44S11.4Cl0.3O0.3 |
Sulfides vs oxides vs halides
The same data grouped by anion chemistry, which we assign from the formula: any S or Se makes a sulfide/selenide, then halide (no O), then oxide, nitride and hydride.
| Group | Compositions | Median σ | Middle 50% | Best σ | ≥ 1 mS/cm | Best composition |
|---|---|---|---|---|---|---|
| Sulfide / selenide | 207 | 5.5×10⁻⁴ | 6.3×10⁻⁶ – 3.2×10⁻³ | 2.8×10⁻² | 42% | Li9.54Si1.74P1.44S11.4Cl0.3O0.3 |
| Other | 4 | 1.8×10⁻⁴ | 3.5×10⁻⁵ – 7.8×10⁻⁴ | 1.1×10⁻³ | 25% | Li2.33PSi0.17 |
| Oxide | 466 | 1.1×10⁻⁵ | 8.3×10⁻⁹ – 2.8×10⁻⁴ | 2.5×10⁻² | 6% | Li3ClO |
| Halide | 37 | 4.3×10⁻⁶ | 4.0×10⁻⁸ – 7.6×10⁻⁴ | 3.0×10⁻³ | 14% | Li3.01ScCl6 |
| Nitride | 11 | 1.0×10⁻⁷ | 3.2×10⁻⁹ – 6.8×10⁻⁶ | 4.2×10⁻⁴ | 0% | Li3N |
| Hydride | 4 | 3.7×10⁻⁸ | 9.5×10⁻⁹ – 2.4×10⁻⁷ | 1.3×10⁻⁶ | 0% | LiY(BH4)4 |
The 30 most conductive solid electrolytes in the dataset
Ranked by measured room-temperature conductivity. Where several reports exist for the same composition, we use the median. Every value links to its source paper.
| # | Composition | σ (S/cm) | Family | Chemistry | Source | Reference |
|---|---|---|---|---|---|---|
| 1 | Li9.54Si1.74P1.44S11.4Cl0.3O0.3 | 2.8×10⁻² | — | Sulfide / selenide | McHaffie et al. | 10.1021/acs.chemmater.0c02351 |
| 2 | Li3ClO | 2.5×10⁻² | Anti-perovskite | Oxide | OBELiX | 10.1039/c3ta15087a |
| 3 | Li9.54Si1.74P1.44S11.7Cl0.3 | 2.5×10⁻² | LGPS | Sulfide / selenide | OBELiX | 10.1038/nenergy.2016.30 |
| 4 | Li5.52PS4.3ClBr0.7 | 2.4×10⁻² | — | Sulfide / selenide | McHaffie et al. | 10.1021/acs.chemmater.0c04650 |
| 5 | Li6.16Si0.62Sb0.38S5.07I0.93 | 1.9×10⁻² | — | Sulfide / selenide | McHaffie et al. | 10.1021/jacs.9b08357 |
| 6 | Li10Ge(P0.925Sb0.075)2S12 | 1.7×10⁻² | — | Sulfide / selenide | McHaffie et al. | 10.1021/acs.chemmater.9b04764 |
| 7 | Li5.64PS4.5ClBr0.5 | 1.7×10⁻² | — | Sulfide / selenide | McHaffie et al. | 10.1021/acs.chemmater.0c04650 |
| 8 | Li10.3Ge1.35P1.65S12 | 1.4×10⁻² | LGPS | Sulfide / selenide | McHaffie et al., OBELiX | 10.1039/c4ta05231e |
| 9 | Li10Ge0.775Sn0.225P2S12 | 1.4×10⁻² | LGPS | Sulfide / selenide | OBELiX | 10.1021/acs.chemmater.8b00266 |
| 10 | Li5.58PS4.7ClBr0.3 | 1.2×10⁻² | — | Sulfide / selenide | McHaffie et al. | 10.1021/acs.chemmater.0c04650 |
| 11 | Li10GePS12 | 1.2×10⁻² | — | Sulfide / selenide | McHaffie et al. | 10.1039/C4TA05231E |
| 12 | Li10.3Sn0.27Si1.08P1.65S12 | 1.1×10⁻² | LGPS | Sulfide / selenide | McHaffie et al., OBELiX | 10.1021/acs.chemmater.7b00886 |
| 13 | Li5.35Ca0.1PS4.5Cl1.55 | 1.0×10⁻² | — | Sulfide / selenide | McHaffie et al. | 10.1021/acs.chemmater.0c03090 |
| 14 | Li6.28Si0.45Sb0.55S5.04I0.96 | 1.0×10⁻² | — | Sulfide / selenide | McHaffie et al. | 10.1021/jacs.9b08357 |
| 15 | Li5.5PS4.5Cl1.5 | 9.3×10⁻³ | — | Sulfide / selenide | McHaffie et al. | 10.1002/anie.201814222 |
| 16 | Li10.5Ge1.5P1.5S12 | 8.7×10⁻³ | LGPS | Sulfide / selenide | OBELiX | 10.1039/c4ta05231e |
| 17 | Li10Ge0.95Si0.05P2S12 | 8.5×10⁻³ | Thio-LISICON | Sulfide / selenide | OBELiX | 10.1016/j.jpowsour.2014.07.159 |
| 18 | Li5.3Ca0.1PS4.5Cl1.5 | 7.8×10⁻³ | — | Sulfide / selenide | McHaffie et al. | 10.1021/acs.chemmater.0c03090 |
| 19 | Li10GeP2S12 | 7.6×10⁻³ | LGPS | Sulfide / selenide | McHaffie et al., OBELiX | 10.1039/c4ta05231e|10.1021/acs.chemmater.7b00886 |
| 20 | Li10Ge0.415Sn0.585P2S12 | 7.4×10⁻³ | LGPS | Sulfide / selenide | OBELiX | 10.1021/acs.chemmater.8b00266 |
| 21 | Li5.55Ca0.1PS4.75Cl1.25 | 6.8×10⁻³ | — | Sulfide / selenide | McHaffie et al. | 10.1021/acs.chemmater.0c03090 |
| 22 | Li10.3Si1.35P1.65S12 | 6.5×10⁻³ | LGPS | Sulfide / selenide | McHaffie et al., OBELiX | 10.1039/c4fd00143e |
| 23 | Li10(Ge0.776Sn0.224)P2S12 | 6.5×10⁻³ | — | Sulfide / selenide | McHaffie et al. | 10.1021/acs.chemmater.8b00266 |
| 24 | Li20Ge1.32Sn0.66P4S24 | 6.5×10⁻³ | — | Sulfide / selenide | McHaffie et al., OBELiX | 10.1021/jacs.0c10735 |
| 25 | Li6.22Ge0.43Sb0.57S5I | 6.3×10⁻³ | — | Sulfide / selenide | McHaffie et al. | 10.1021/jacs.9b08357 |
| 26 | Li10.3Si1.27P1.73S12 | 5.6×10⁻³ | LGPS | Sulfide / selenide | OBELiX | 10.1039/c4fd00143e |
| 27 | Li1.421Al0.421Ti1.579(PO4)3 | 5.6×10⁻³ | — | Oxide | McHaffie et al. | 10.1016/j.solidstatesciences.2016.08.011 |
| 28 | Li1.312Al0.407Ti1.592(PO4)3 | 5.6×10⁻³ | — | Oxide | McHaffie et al. | 10.1016/j.solidstatesciences.2016.08.011 |
| 29 | Li6.7P0.3Ge0.7S5I | 5.5×10⁻³ | Argyrodite | Sulfide / selenide | OBELiX | 10.1021/jacs.8b10282 |
| 30 | Li9.81Sn0.81P2.19S12 | 5.5×10⁻³ | LGPS | Sulfide / selenide | McHaffie et al., OBELiX | 10.1039/c4fd00143e |
Search all 729 compositions
| Composition | σ (S/cm) | Family | Chemistry | Space group | Source | Reference |
|---|---|---|---|---|---|---|
| Li9.54Si1.74P1.44S11.4Cl0.3O0.3 | 2.8×10⁻² | — | Sulfide / selenide | — | McHaffie et al. | 10.1021/acs.chemmater.0c02351 |
| Li3ClO | 2.5×10⁻² | Anti-perovskite | Oxide | Pm-3m | OBELiX | 10.1039/c3ta15087a |
| Li9.54Si1.74P1.44S11.7Cl0.3 | 2.5×10⁻² | LGPS | Sulfide / selenide | P42/nmc | OBELiX | 10.1038/nenergy.2016.30 |
| Li5.52PS4.3ClBr0.7 | 2.4×10⁻² | — | Sulfide / selenide | — | McHaffie et al. | 10.1021/acs.chemmater.0c04650 |
| Li6.16Si0.62Sb0.38S5.07I0.93 | 1.9×10⁻² | — | Sulfide / selenide | — | McHaffie et al. | 10.1021/jacs.9b08357 |
| Li10Ge(P0.925Sb0.075)2S12 | 1.7×10⁻² | — | Sulfide / selenide | — | McHaffie et al. | 10.1021/acs.chemmater.9b04764 |
| Li5.64PS4.5ClBr0.5 | 1.7×10⁻² | — | Sulfide / selenide | — | McHaffie et al. | 10.1021/acs.chemmater.0c04650 |
| Li10.3Ge1.35P1.65S12 | 1.4×10⁻² | LGPS | Sulfide / selenide | P42/nmc | McHaffie et al., OBELiX (2 reports, median) | 10.1039/c4ta05231e |
| Li10Ge0.775Sn0.225P2S12 | 1.4×10⁻² | LGPS | Sulfide / selenide | P42/nmc | OBELiX | 10.1021/acs.chemmater.8b00266 |
| Li5.58PS4.7ClBr0.3 | 1.2×10⁻² | — | Sulfide / selenide | — | McHaffie et al. | 10.1021/acs.chemmater.0c04650 |
| Li10GePS12 | 1.2×10⁻² | — | Sulfide / selenide | — | McHaffie et al. | 10.1039/C4TA05231E |
| Li10.3Sn0.27Si1.08P1.65S12 | 1.1×10⁻² | LGPS | Sulfide / selenide | P42/nmc | McHaffie et al., OBELiX (3 reports, median) | 10.1021/acs.chemmater.7b00886 |
| Li5.35Ca0.1PS4.5Cl1.55 | 1.0×10⁻² | — | Sulfide / selenide | — | McHaffie et al. | 10.1021/acs.chemmater.0c03090 |
| Li6.28Si0.45Sb0.55S5.04I0.96 | 1.0×10⁻² | — | Sulfide / selenide | — | McHaffie et al. | 10.1021/jacs.9b08357 |
| Li5.5PS4.5Cl1.5 | 9.3×10⁻³ | — | Sulfide / selenide | — | McHaffie et al. | 10.1002/anie.201814222 |
| Li10.5Ge1.5P1.5S12 | 8.7×10⁻³ | LGPS | Sulfide / selenide | P42/nmc | OBELiX (2 reports, median) | 10.1039/c4ta05231e |
| Li10Ge0.95Si0.05P2S12 | 8.5×10⁻³ | Thio-LISICON | Sulfide / selenide | P42/nmc | OBELiX | 10.1016/j.jpowsour.2014.07.159 |
| Li5.3Ca0.1PS4.5Cl1.5 | 7.8×10⁻³ | — | Sulfide / selenide | — | McHaffie et al. | 10.1021/acs.chemmater.0c03090 |
| Li10GeP2S12 | 7.6×10⁻³ | LGPS | Sulfide / selenide | P42/nmc | McHaffie et al., OBELiX (8 reports, median) | 10.1039/c4ta05231e|10.1021/acs.chemmater.7b00886 |
| Li10Ge0.415Sn0.585P2S12 | 7.4×10⁻³ | LGPS | Sulfide / selenide | P42/nmc | OBELiX | 10.1021/acs.chemmater.8b00266 |
| Li5.55Ca0.1PS4.75Cl1.25 | 6.8×10⁻³ | — | Sulfide / selenide | — | McHaffie et al. | 10.1021/acs.chemmater.0c03090 |
| Li10.3Si1.35P1.65S12 | 6.5×10⁻³ | LGPS | Sulfide / selenide | P42/nmc | McHaffie et al., OBELiX (3 reports, median) | 10.1039/c4fd00143e |
| Li10(Ge0.776Sn0.224)P2S12 | 6.5×10⁻³ | — | Sulfide / selenide | — | McHaffie et al. | 10.1021/acs.chemmater.8b00266 |
| Li20Ge1.32Sn0.66P4S24 | 6.5×10⁻³ | — | Sulfide / selenide | P42/nmcZ | McHaffie et al., OBELiX (2 reports, median) | 10.1021/jacs.0c10735 |
| Li6.22Ge0.43Sb0.57S5I | 6.3×10⁻³ | — | Sulfide / selenide | — | McHaffie et al. | 10.1021/jacs.9b08357 |
| Li10.3Si1.27P1.73S12 | 5.6×10⁻³ | LGPS | Sulfide / selenide | P42/nmc | OBELiX | 10.1039/c4fd00143e |
| Li1.421Al0.421Ti1.579(PO4)3 | 5.6×10⁻³ | — | Oxide | — | McHaffie et al. | 10.1016/j.solidstatesciences.2016.08.011 |
| Li1.312Al0.407Ti1.592(PO4)3 | 5.6×10⁻³ | — | Oxide | — | McHaffie et al. | 10.1016/j.solidstatesciences.2016.08.011 |
| Li6.7P0.3Ge0.7S5I | 5.5×10⁻³ | Argyrodite | Sulfide / selenide | F-43m | OBELiX | 10.1021/jacs.8b10282 |
| Li9.81Sn0.81P2.19S12 | 5.5×10⁻³ | LGPS | Sulfide / selenide | P42/nmc | McHaffie et al., OBELiX (3 reports, median) | 10.1039/c4fd00143e |
| Li5.77PS5Br | 5.5×10⁻³ | — | Sulfide / selenide | — | McHaffie et al. | 10.1021/acs.chemmater.9b05331 |
| Li10.4Si1.43P1.57S12 | 5.2×10⁻³ | LGPS | Sulfide / selenide | P42/nmc | OBELiX | 10.1039/c4fd00143e |
| Li6.6P0.4Ge0.6S5I | 5.2×10⁻³ | Argyrodite | Sulfide / selenide | F-43m | OBELiX | 10.1021/jacs.8b10282 |
| Li5.7Ca0.15PS5Cl | 5.2×10⁻³ | — | Sulfide / selenide | — | McHaffie et al. | 10.1021/acs.chemmater.0c03090 |
| Li10.5Sn0.3Si1.2P1.5S12 | 5.1×10⁻³ | LGPS | Sulfide / selenide | P42/nmc | McHaffie et al., OBELiX (2 reports, median) | 10.1021/acs.chemmater.7b00886 |
| Li5.82PS4.7ClBr | 5.0×10⁻³ | — | Sulfide / selenide | — | McHaffie et al. | 10.1021/acs.chemmater.0c04650 |
| Li10(Ge0.416Sn0.584)P2S12 | 4.8×10⁻³ | — | Sulfide / selenide | — | McHaffie et al. | 10.1021/acs.chemmater.8b00266 |
| Li20Ge0.66Sn1.32P4S24 | 4.8×10⁻³ | — | Sulfide / selenide | P42/nmcZ | McHaffie et al., OBELiX (2 reports, median) | 10.1021/jacs.0c10735 |
| Li1.414Al0.511Ti1.489(PO4)3 | 4.7×10⁻³ | — | Oxide | — | McHaffie et al. | 10.1016/j.solidstatesciences.2016.08.011 |
| Li9.78Sn0.78P2.22S12 | 4.6×10⁻³ | LGPS | Sulfide / selenide | P42/nmc | OBELiX | 10.1039/c4fd00143e |
| Li9.86Sn0.84P2.16S12 | 4.4×10⁻³ | LGPS | Sulfide / selenide | P42/nmc | OBELiX | 10.1039/c4fd00143e |
| Li10.1Ge1.05P1.95S12 | 4.4×10⁻³ | Thio-LISICON | Sulfide / selenide | P21/m | OBELiX (2 reports, median) | 10.1149/1.1379028 |
| Li6.07Si0.34Sb0.66S5.01I0.99 | 4.2×10⁻³ | — | Sulfide / selenide | — | McHaffie et al. | 10.1021/jacs.9b08357 |
| Li6PS4.8Se0.2Br | 3.9×10⁻³ | Argyrodite | Sulfide / selenide | F-43m | McHaffie et al., OBELiX (2 reports, median) | 10.1021/acs.inorgchem.8b02443 |
| Li10SnP2S12 | 3.9×10⁻³ | LGPS | Sulfide / selenide | P42/nmc | McHaffie et al., OBELiX (6 reports, median) | 10.1021/ja407393y |
| Li6PS4.1Se0.9Br | 3.8×10⁻³ | Argyrodite | Sulfide / selenide | F-43m | McHaffie et al., OBELiX (2 reports, median) | 10.1021/acs.inorgchem.8b02443 |
| Li10Sn0.99P2.01S12 | 3.7×10⁻³ | LGPS | Sulfide / selenide | P42/nmc | OBELiX | 10.1039/c4fd00143e |
| Li9.9Sn0.9P2.1S12 | 3.6×10⁻³ | LGPS | Sulfide / selenide | P42/nmc | OBELiX | 10.1039/c4fd00143e |
| Li6PS4.6Se0.4Br | 3.6×10⁻³ | Argyrodite | Sulfide / selenide | F-43m | McHaffie et al., OBELiX (2 reports, median) | 10.1021/acs.inorgchem.8b02443 |
| Li6PS4.7Se0.3Br | 3.6×10⁻³ | Argyrodite | Sulfide / selenide | F-43m | McHaffie et al., OBELiX (2 reports, median) | 10.1021/acs.inorgchem.8b02443 |
Why 1 mS/cm is the line that matters
Liquid carbonate electrolytes in today’s lithium-ion cells conduct at around 10 mS/cm at room temperature. A solid electrolyte has to come within roughly an order of magnitude of that, usually stated as 1 mS/cm, before a solid-state cell can deliver useful power without heating. Sulfides clear that bar most often, but they are sensitive to moisture and can react with lithium metal. Oxides such as garnets are more robust, so much of the engineering effort goes into raising their conductivity through doping and densification.
Conductivity is only one requirement. Stability against the electrodes and processability matter too. For computed stability of candidate compositions, see the solid-state electrolyte screen.
How this atlas was built
- We merge two openly licensed, curated datasets of room-temperature lithium-ion conductivity (OBELiX and McHaffie et al.), keeping only lithium-containing compositions. Datasets that need a commercial licence, or that lack measurement temperatures, are not included.
- Compositions are matched on reduced formula. When a composition has several reports, we use the median log-conductivity. OBELiX formulas, stored per unit cell, are rescaled to the conventional formula unit for display.
- Below-detection OBELiX results (“below 10⁻¹⁰ S/cm”) are upper bounds, not measurements, and are left out. Some McHaffie values are extrapolated to room temperature from higher-temperature Arrhenius data.
- Structural family labels are the OBELiX curators’, also applied to McHaffie entries with the same composition. The anion chemistry is assigned by rule from the formula.
- Reported conductivities depend on synthesis, density and measurement setup. Treat each value as one report, not an intrinsic constant. Page built 2026-09-30.
Download and cite
Every row behind this page (729 rows) as CSV, with source identifiers so each value can be traced back.
Download CSVLatticeGraph (2026). "Solid-State Electrolyte Ionic Conductivity Atlas: Measured Room-Temperature Li-Ion Conductivity." LatticeGraph Data Atlas, snapshot 2026-09-30 (warehouse 20260925T154847Z). https://latticegraph.com/atlas/solid-electrolyte-ionic-conductivity
Please also cite the original datasets listed under Sources.
Datasets and licences
- Curated Li solid electrolytes with room-temperature conductivity, space group and expert family labels. 562 measurements used; 37 below-detection results (reported as "<10⁻¹⁰ S/cm") excluded from statistics.F. Therrien et al., Digital Discovery (2026), doi:10.1039/D5DD00441A.License: CC BY 4.0
- 565 room-temperature conductivities measured by impedance spectroscopy and paired with ICSD structures. Low-conductivity entries are often extrapolated to room temperature from Arrhenius data.D. B. McHaffie et al., Digital Discovery (2025), doi:10.1039/D5DD00052A. Data: doi:10.22002/23mvv-6gk43.License: CC0 1.0
Frequently asked questions
Which solid-state electrolytes have the highest lithium-ion conductivity?
In this dataset the most conductive solid electrolytes are sulfides from the LGPS (Li10GeP2S12-type) and argyrodite (Li6PS5X-type) families. They make up 27 of the top 30 and reach about 10⁻² S/cm (10 mS/cm) at room temperature. The highest value is Li9.54Si1.74P1.44S11.4Cl0.3O0.3 at 2.8×10⁻² S/cm. 13 of 729 compositions reach 10 mS/cm or more.
What is a good ionic conductivity for a solid electrolyte?
A common target is 1 mS/cm (10⁻³ S/cm) at room temperature. Conventional liquid carbonate electrolytes reach about 10 mS/cm. 120 of the 729 compositions here (16%) reach 1 mS/cm. The median is 2.6×10⁻⁵ S/cm.
Are sulfide electrolytes more conductive than oxides?
Yes, by a wide margin. The median sulfide or selenide in this dataset reaches 5.5×10⁻⁴ S/cm, against 1.1×10⁻⁵ S/cm for oxides, and 42% of sulfides exceed 1 mS/cm compared with 6% of oxides. Oxides trade conductivity for better stability in air and against lithium metal.
What is the ionic conductivity of garnet LLZO?
Garnet-type electrolytes (Li7La3Zr2O12 and its Al-, Ga-, Ta- and Nb-doped variants) have a median room-temperature conductivity of 1.4×10⁻⁴ S/cm across 86 compositions here. The best reach 1.4×10⁻³ S/cm. Doping stabilises the more conductive cubic phase.
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