CsPF6 {Cesium Hexafluorophosphate, >99.9%} Powder as Electrolyte Additive for Lithium-Ion Battery, 10-50 g/bottle, CLIBEACsPF6

Cesium hexafluorophosphate (CsPF6) is an inorganic salt widely investigated as a specialized ionic electrolyte additive for advanced lithium-ion and lithium-metal batteries. By introducing heavy, large-radius alkali metal cations (Cs+) alongside compatible hexafluorophosphate (PF6^-) anions into standard carbonate master electrolytes, CsPF6 enables precise control over interphase formation chemistry and surface electrostatics.

The main functional roles in electrolyte engineering are: (1) Solvation Sheath & SEI Direction: Due to the strong preferential coordination of Cs+ with cyclic carbonates (such as Ethylene Carbonate, EC), the presence of cesium alters the primary lithium-ion solvation structure. This shifts the reduction potential of the solvated complex, promoting the preferential early-stage decomposition of the inner sheath to build an ultrathin, compact, and inorganic-rich Solid Electrolyte Interphase (SEI). (2) Self-Healing Electrostatic Shield (SHES) Mechanism: In lithium-metal systems, Cs+ ions—possessing a lower reduction potential relative to Li+—accumulate electrostatically around initial microscopic surface protuberances or hot spots. This localized positive charge builds a transient electrostatic shield that repels incoming Li+ ions, effectively mitigating dendritic growth and smoothing lithium electrodeposition. (3) Suppression of Co-Intercalation: By stabilizing the interphase on standard carbonaceous hosts, CsPF6 prevents solvent co-intercalation and graphite exfoliation, notably unlocking the use of wider-temperature solvents like propylene carbonate (PC). 

Part Number	CLIBEACsPF6 (C-LIB-EA-CsPF6)
Chemical Formula	CsPF6
Appearance	White Powder
Purity	>99.9% (Battery Grade)
Molecular Weight	277.87 g/mol
Package Size	10 g, 25 g, and 50 g/bottle

Notes: Please store the CsPF6 powder in the glovebox due to its sensitivity to humidity and oxygen 

References: 

1. L. Xiao, et al. Enhanced performance of Li|LiFePO4 cells using CsPF6 as an electrolyte additive, Journal of Power Sources, 2015, 293, 1062-1067
   
2. S. Kim, et al., Suppression of dendrites and granules in surface-patterned Li metal anodes using CsPF6, Journal of Power Sources, 2019, 413, 344-350