A perfluorobutyl sulfonate salt
Directly applied as an additive in perovskite solar cells and lithium batteries, and serving as a precursor for ionic liquids
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Potassium nonafluoro-1-butanesulfonate (CAS number 29420-49-3) is a potassium salt of perfluorobutyl sulfonic acid. The sulfonate group can coordinate to metal centres, acting as an anchoring unit. Therefore, potassium nonafluoro-1-butanesulfonate is commonly used as an interface additive in lithium-ion batteries and perovskite solar cells. It forms a stable passivation layer on cathode material, LiNi0.5Mn1.5O4 (LNMO), leading to minimum capacity decay after 1000 cycles at 1C and 5V. Potassium nonafluoro-1-butanesulfonate adjusts the energy matching of SnO2 electron transport layer and the perovskite in perovskite solar cells. It assists in the passivation of the defects at the interface, resulting in an increase in powder conversion efficiency (PCE) from 20.6% to 23.2%.
Potassium nonafluoro-1-butanesulfonate is also employed in the synthesis of ionic liquids, in cooperation with pyrrolidinium salts. These ionic liquids modify the surface of the cathode materials in lithium batteries with enhanced stability and performance.
Enhance stability and performance
used as an additive
Fluorinated potassium butanesulfonate building block
for ionic liquid, perovskite solar cells, and battery research
Low Cost
Competitively priced, high quality product
High purity
>98% High purity
General Information
| CAS Number | 29420-49-3 |
| Chemical Formula | C4F9KO3S |
| Full Name | Potassium 1,1,2,2,3,3,4,4,4-nonafluoro-1-butanesulfonate |
| Molecular Weight | 338.19 g/mol |
| Synonyms | Potassium nonaflate, Potassium nonafluorobutanesulfonate, Potassium perfluorobutanesulfonate, KPBS |
| Classification / Family | Fluorinated building blocks, Sulfonate anchoring units, Perfluoroalkyls, Ionic liquids, Batteries, Perovskite solar cells, Solid additives |
Chemical Structure
Product Details
| Purity | 98% |
| Melting Point | Tm > 280 °C |
| Appearance | White powder |
MSDS Documentation
Literature and Reviews
- One thousandth of quaternity slurry additive enables one thousand cycle of 5V LNMO cathode, J. Zhang et al., Energy Storage Mater., 64, 103060 (2024); DOI: 10.1016/j.ensm.2023.103060.
- High-performance pyrrolidinium-based poly(ionic liquid) binders for Li-ion and Li-air batteries, S. Vauthier et al., Mater. Today Chem., 27, 101293 (2023); DOI: 10.1016/j.mtchem.2022.101293.
- Multifunctional molecule of potassium nonafluoro-1-butanesulfonate for high-efficient perovskite solar cells, Z. Wu et al., J. Chem. Eng., 449, 137851 (2022); DOI: 10.1016/j.cej.2022.137851.
