Propanesultone(PST) 500g

Propanesultone (PST), Battery Grade 500g

Chemical Name: Propanesultone
CAS Number: 1120-71-4
Product Code: EL1120-71-4
Grade: Battery Grade
Brand: Xnergy

Product Introduction

1,3-Propane sultone (PST) is a cyclic sulfonate ester additive that preferentially decomposes on the graphite anode surface at a reduction potential above that of the carbonate co-solvents. The resulting sulfonate-rich SEI layer provides a more mechanically stable and ionically conductive interphase than the carbonate-derived SEI from EC alone, leading to lower interfacial impedance and reduced capacity fade over extended cycling. Used typically at 0.5–2 wt% in LiPF₆ electrolyte formulations, PST has a well-documented track record in both academic research and commercial cell development. Xnergy supplies battery-grade PST for anode SEI modification studies.

Key Features

• Sulfonate-rich SEI formation — preferential decomposition at higher reduction potential yields a stable, ion-conducting sulfonate interphase on graphite
• Lower interfacial impedance — sulfonate SEI maintains good Li⁺ transport kinetics over cycling, reducing impedance rise
• Effective at low concentrations — 0.5–2 wt% delivers measurable cycle life improvement without bulk electrolyte changes
• Synergistic with other additives — commonly co-used with VC, FEC, or DTD in multi-additive electrolyte packages
• Purity ≥99% / H₂O ≤10 ppm — battery-grade specifications for controlled additive studies
• Flexible volumes — available from 1 kg for laboratory research to larger quantities for cell manufacturing

Specification

Application Areas

• Graphite anode SEI modification in LiPF₆/carbonate electrolytes
• Long-cycle-life electrolyte formulation for NCM/Gr and LFP/Gr full cells
• Multi-additive package development combining PST with VC, FEC, or DTD
• Fast-charging electrolyte design requiring low interfacial impedance at high C-rates
• Comparative sulfonate additive studies (PST vs. 1,4-butane sultone vs. ES)
• Anode SEI characterization using XPS, cryo-TEM, and impedance spectroscopy

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• Browse the full Solvents category.