|
|
| | Potassium hexafluorophosphate Basic information |
| | Potassium hexafluorophosphate Chemical Properties |
| Melting point | 575 °C (lit.) | | Boiling point | decomposes [STR93] | | density | 2.75 g/mL at 25 °C (lit.) | | storage temp. | Refrigerator | | solubility | Methanol (Slightly), Water (Soluble) | | form | Powder | | color | White | | Specific Gravity | 2.55 | | Water Solubility | 93 g/L (25 ºC) | | Sensitive | Hygroscopic | | Stability: | Stable. Incompatible with strong acids. Thermal decomposition may generate HF, phosphorus oxides and phosphine. | | InChI | InChI=1S/F6P.K/c1-7(2,3,4,5)6;/q-1;+1 | | InChIKey | YZDGRYDIGCWVND-UHFFFAOYSA-N | | SMILES | [P+5]([F-])([F-])([F-])([F-])([F-])[F-].[K+] | | CAS DataBase Reference | 17084-13-8(CAS DataBase Reference) | | EPA Substance Registry System | Phosphate(1-), hexafluoro-, potassium (17084-13-8) |
| Hazard Codes | C,Xi | | Risk Statements | 34-20/21/22 | | Safety Statements | 26-27-36/37/39-45 | | RIDADR | UN 3260 8/PG 2 | | WGK Germany | 1 | | Hazard Note | Irritant | | TSCA | TSCA listed | | HazardClass | 8 | | PackingGroup | III | | HS Code | 28269090 | | Storage Class | 8A - Combustible corrosive hazardous materials | | Hazard Classifications | Eye Dam. 1
Skin Corr. 1B |
| | Potassium hexafluorophosphate Usage And Synthesis |
| Description | Potassium hexafluorophosphate, abbreviated as KPF6, is a associated electrolyte. In battery systems, it acts as an electrolyte additive in anode-less lithium metal batteries, lithium-sulphur batteries and solid-state batteries; by forming a protective shielding effect and modulating the solid-state electrolyte interface, it enhances cycling stability, ionic conductivity and electrochemical performance [1-3].
In perovskite solar cells, KPF6 is used as an interface modification material; by treating the SnO2 quantum dot/perovskite interface, it can passivate defects and enhance stable photoconversion efficiency [4]. | | Chemical Properties | white crystalline powder | | Uses | Potassium Hexafluorophosphate is used in preparation of Moxifloxacin derivatives and its application. | | Uses | A soluble neutral salt, Potassium hexafluorophosphate can be used for synthesis. | | Preparation | Potassium hexafluorophosphate is prepared by reacting phosphorus pentachloride, potassium chloride, and hydrofluoric acid in liquid hydrogen fluoride. The reaction equation is: PCl₅ + KCl + 6HF → KPF₆ + 6HCl. | | Hazard | Toxic by ingestion. | | Purification Methods | Crystallise it from alkaline aqueous solution, using polyethylene vessels, or from 95% EtOH, and dry it in a vacuum desiccator over KOH. [Kloditz Z Anorg Allgem Chem 284 144 1956, Kwasnik in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol I p 196 1963.] | | References |
[1]
Hagos, T. M., Berhe, G. B., Hagos, T. T., Bezabh, H. K., Abrha, L. H., Beyene, T. T., Huang, C.-J., Yang, Y.-W., Su, W.-N., Dai, H., Hwang, B.-J. (2019). Dual electrolyte additives of potassium hexafluorophosphate and tris (trimethylsilyl) phosphite for anode-free lithium metal batteries. Electrochimica Acta, 316, 52–59. https://doi.org/10.1016/j.electacta.2019.05.061
[2]
Li, J., Liu, S., Cui, Y., Zhang, S., Wu, X., Xiang, J., Li, M., Wang, X., Xia, X., Gu, C., Tu, J. (2020). Potassium Hexafluorophosphate Additive Enables Stable Lithium–Sulfur Batteries. ACS Applied Materials & Interfaces, 12(50), 56017–56026. https://doi.org/10.1021/acsami.0c17406
[3]
Li, J., Liang, J., Ren, Z., Shi, C., Li, Y., Zhang, L., Zhang, Q., He, C., Ren, X. (2022). Insights of potassium hexafluorophosphate additive in solid polymer electrolyte for realizing high performance all-solid-state lithium metal batteries. Electrochimica Acta, 429, 141061. https://doi.org/10.1016/j.electacta.2022.141061
[4]
Wang, Z., Wu, T., Xiao, L., Qin, P., Yu, X., Ma, L., Xiong, L., Li, H., Chen, X., Wang, Z., Wu, T., Xiao, M. L., Qin, P., Yu, D. X., Ma, D. L., Xiong, D. L., Li, D. H., Chen, X. (2021). Multifunctional potassium hexafluorophosphate passivate interface defects for high efficiency perovskite solar cells. Journal of Power Sources, 488, 229451. https://doi.org/10.1016/j.jpowsour.2021.229451
|
| | Potassium hexafluorophosphate Preparation Products And Raw materials |
|