Sulfur Dioxide and Sulfolane as Additives in Organic Electrolytes to Develop Room-Temperature Sodium Batteries

Sodium metal anodes have attracted great attention for the development of a next generation high-energy batteries because their high theoretical capacity (1166 mAh·g−1), low redox potential (−2.71 V vs. SHE), and abundance. However, sodium reacts with most liquid electrolytes described to date it has shortcoming dendrite formation during deposition. Several strategies been proposed overcome these issues, including incorporation electrolyte additives. This work reports on use SO2 sulfolane as additives in organic modify sodium–electrolyte interphase, making plating/stripping process more robust. Not only is stable case anodes, but also copper substrates enabled. In fact, high-quality films attained by adding small mole fractions additives, which paves way anode-free batteries. general vein, this stresses importance researching compatible cost-effective that can be easily implemented practice.