1, 3, 2-Dioxathiolane 2,2-Dioxide (DTD)

High-Purity 1,3,2-Dioxathiolane 2,2-Dioxide (DTD) – Battery Grade Electrolyte Additive (CAS 1072-53-3)

Xnergy Materials supplies battery-grade 1,3,2-Dioxathiolane 2,2-Dioxide (DTD), also known as ethylene sulfate or DTD electrolyte additive (CAS No. 1072-53-3), a premium cyclic sulfate compound engineered for advanced lithium-ion battery (LIB) and lithium metal battery (LMB) applications. Our DTD meets the strict purity and moisture specifications required by leading battery manufacturers and R&D institutions worldwide.

Key Applications of DTD Electrolyte Additive

As one of the most widely adopted SEI (Solid Electrolyte Interphase) film-forming additives, DTD plays a critical role in modern battery electrolyte formulations:

• SEI Film Formation — DTD preferentially decomposes on the anode surface at a higher reduction potential than carbonate solvents (EC/PC), forming a stable, ionically conductive SEI layer that protects the electrode from irreversible side reactions.
• Cycle Life Enhancement — By coordinating with lithium salts and alkali metal ions, DTD forms stable complexes that significantly extend battery cycle life, particularly in graphite/LiFePO₄ (LFP) and graphite/NCM pouch cells.
• Fast-Charging Performance — When combined with co-additives such as LiDFP (lithium difluorophosphate), DTD enables commercial Gr/LFP cells to achieve over 2,400 cycles at 2C fast-charging rates.
• High-Voltage Stabilization — DTD is a proven additive for stabilizing high-voltage cathode systems including LiCoO₂, NCM811, and LNMO.
• Lithium Metal Anode Protection — DTD modifies the Li-ion solvation structure, suppresses lithium dendrite growth, reduces “dead lithium” formation, and improves coulombic efficiency (CE) in Li-metal batteries.
• Sodium-Ion Battery R&D — DTD is also used in NaBOB-based electrolytes for next-generation sodium-ion batteries.

Why Choose Xnergy’s Battery-Grade DTD?

Backed by over 30 years of R&D experience in high-purity electrolyte chemicals, Xnergy Materials provides DTD with precisely controlled water (≤10 ppm) and free acid (≤10 ppm) content — two critical parameters that directly impact electrolyte stability and battery performance. Our DTD is trusted by leading battery manufacturers and research laboratories globally.

We offer flexible supply volumes ranging from 1 kilogram for laboratory R&D to several metric tons for pilot-scale and mass production, with reliable global logistics and technical support.

Product Specifications

Request a Quote / Technical Data Sheet (TDS) — Contact Xnergy Materials for bulk pricing, COA, MSDS, and custom specifications tailored to your battery electrolyte formulation needs.