Rechargeable Na–SO2 Battery with Ethylenediamine Additive in Ether‐Based Electrolyte. (25th May 2020)

• Record Type: Journal Article
• Authors: Liu, Xizheng; Ma, Wenqing; Lei, Xiaofeng; Zhang, Shichao; Ding, Yi
• Is Part Of: Advanced functional materials. Volume 30:Number 28(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-05-25
• Subjects: ether‐based electrolyte -- ethylenediamine -- Na–SO2 battery -- Ru‐rGO -- SO2 utilization; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adfm.202002120
• Languages: English
• ISSNs: 1616-301X

Abstract

Abstract: Rechargeable metal–SO2 batteries have drawn tremendous attention because it can accelerate SO2 fixation/utilization and offer high energy density. Herein, a rechargeable Na–SO2 battery based on an ether‐based liquid electrolyte with an ethylenediamine (EDA) additive is realized via the reversible formation/decomposition of Na2 S2 O4 . Experimental investigations reveal that the EDA additive provides three benefits by simultaneously decreasing the overall electrode polarization, increasing the full discharge capacity, and improving battery cyclability. At a current density of 250 mA g −1, the full discharge capacity of the battery with the EDA additive is more than twice of a similar system in the absence of EDA. In addition to the significantly enhanced capacity, the as‐assembled Na–SO2 battery demonstrates excellent cyclic stability after 200 cycles, which is equivalent to a total duration of 1600 h. Moreover, the corrosion resistance of Na anode is strengthened with the aid of EDA in the SO2 ‐containing liquid electrolyte. This work will pave the way for Na–SO2 batteries as a promising battery technology toward both pollutant gas utilization and energy storage. Abstract : A rechargeable Na–SO2 battery is realized with a Ru‐rGO catalyst and an ether‐based electrolyte with an ethylenediamine (EDA) additive. The EDA can serve as a powerful electrolyte additive to promote the SO2 dissolution and suppress the Na corrosion, and thus increases SO2 concentration on the electrode surface and lowers the electrode polarization.