NewPerformance Evaluation and Analysis of Rolechem's ARC-S20 DTD Derivative Series

Rolechem has launched its new additive, ARC-S20. As a DTD derivative, this product offers good electrolyte stability, effectively overcoming the drawback of relatively poor electrolyte stability associated with DTD. Furthermore, it enhances the cell's low-temperature performance and rate capability while maintaining high-temperature performance. With its exceptional comprehensive performance, it can serve as an alternative additive to DTD. We welcome industry partners to engage with us for further discussions.

Cell Type: 1Ah pouch cell Chemistry System: NCM811 / Graphite Voltage Window: 2.75 V – 4.25 V Electrolyte Baseline (Ref): EC : EMC : DEC = 3 : 5 : 2 ,1.1M LiPF6, with VC + LiFSI + LiODFB additives Reference Group: 1% DTD Experimental Group: 1% S20

As a DTD derivative, S20 exhibits good electrolyte stability. The impedance of the S20 cell group is slightly higher than that of the DTD group, but overall they remain quite close. Similar to DTD, S20 can form a stable SEI film to suppress the reactions of carbonate solvents, and S20 forms a film on the anode prior to DTD. The resulting SEI film is rich in sulfur elements, which can effectively increase the ionic conductivity of the SEI film. Compared with DTD, S20 demonstrates superior low-temperature performance and rate capability, making it an excellent low-temperature-improving additive. Under 60°C storage conditions, both the capacity retention and recovery rates of the S20 cell group are comparable to those of the DTD group, indicating that both additives can form favorable interfacial films on both the cathode and anode sides, reduce side reactions, and improve high-temperature performance. Additionally, its high-temperature cycling performance is on par with that of the DTD group.

In summary, ARC-S20 features good electrolyte stability, can form a high-performance SEI film, reduces cell impedance, enhances low-temperature and rate performance, and improves high-temperature performance. Its comprehensive performance is superior to that of DTD, making it an ideal alternative additive to DTD.