Electrolyte materials for long-lasting, thermally stable, safer, lithium-ion batteries

Additives for high-performance anodes, cathodes, and increased safety

Sionic Energy’s safer, (non-volatile) electrolyte additives use a proprietary Multi-Functional Molecule (MFM) design methodology that enables specific critical electrochemical function enhancements to maximize the performance of base electrolyte formulations. Sionic’s MFM design methodology produces tailored additives, designed rapidly, to provide greater performance at a lower cost.

Sionic Energy Electrolyte Additives

Our electrolyte additives are designed to form stable interphases on lithium-ion battery anodes and cathodes, improving battery safety and high-voltage stability, for enabling wider operating temperatures while improving cycle life and power performance.

Safety Electrolyte Additives (SEA)

Thermal runaway is a major safety concern hindering the large-scale application of Ni-rich cathode materials due to cathode instability and oxygen evolution. The thermal stability of Ni-rich cathodes is attributed to the loss of oxygen, especially caused by the oxidation of lattice oxygen in H3 phase of the cathode. Sionic’s safety additives limit such oxidation kinetics and thereby reduce the self-heating rate of thermal runaway reactions.

Anode Electrolyte Additives (AEA)

Sionic’s electrolyte additives based on thio-phosphate core chemistry are designed to form robust SEI (Solid Electrolyte Interphase) on the surface of the anode to reduce resistance growth and improve charge rate performance.

Cathode Electrolyte Additives (CEA)

Sionic’s electrolyte additives, based on phosphate core chemistry, are designed to form robust CEI (Cathode Electrolyte Interphase) on the surface of the cathode to prevent solvent oxidation catalyzed by Ni and mitigate the resistive film growth and reduce gas generation.

Li-ion Electrolyte Additives	Safety Electrolyte Additives - SEA	Anode Electrolyte Additives - AEA	Cathode Electrolyte Additives - CEA
Target Cell Chemistry Additives	NMCs, NCA, LFP & LCO / Gr, Gr+Si	NMCs, NCA/ Gr, Gr+Si	NMCs, NCA/ Gr, Gr+Si
Additive Function	Lowers internal resistance Lowers self-heating rate	Lowers internal resistance Enhances SEI Layer formation for performance & resiliency	Lowers internal resistance Reduces gassing Minimizes side reactions & capacity loss
Benefits	Mitigates thermal runaway risks Eliminates cell-to-cell thermal propagation Excellent high-temperature capacity retention & recovery Less expensive supplement & replacement for fluoroethylene	Extends cycle life Replacement of sultone for environmental regulation acceptance	Reduces capacity loss during shelf life Extends cycle life in high-temperature operating environments Less expensive supplement & replacement for LiPO2F2, LiDFP2
Applications	Safety-critical performance applications & products	High-capacity silicon anode batteries designs Long-duration cycle life volume requirements Environmentally-restricted material cell designs	Products requiring a long shelf- or calendar-life High temperature operating environments Cost-sensitive applications & products Nickel-rich cathode cell designs

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Next-generation lithium-ion battery technology and electrolyte additives designed for scaled commercialization

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