Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance work on Wednesday 22nd May 2019 from 11:00 AM to 1:00 PM (GMT).

During this time our website performance may be temporarily affected. We apologise for any inconvenience this might cause and thank you for your patience.



Asymmetric Allyl-Activation of Organosulfides for High-Energy Reversible Redox Flow Batteries

Abstract

Organosulfide (R-Sn-R) exhibits high theoretical capacity and low cost, but suffer from sluggish kinetics and poor reversibility. Here, we demonstrate an effective and universal strategy to improve their redox activity by replacing one organic functional group with an allyl (A) to form asymmetric allyl-substituted organosulfides (R-Sn-A). This promotes the cleavage of the A-S bond owing to facile generation of allyl radial, thereby improving the reduction kinetics and capacity. We verified the formation of asymmetric organosulfides by gas-chromatography-mass spectrometry and show that the allyl-activation strategy is universal to a series of functional groups. We successfully increased the discharge potential (up to 280 mV) and discharge capacity (up to 200%) of the organosulfide compared to its symmetric counterpart. A highly-concentrated liquid electrolyte (5 M) with a volumetric capacity of 224 Ah L-1 was realized, demonstrating a substantial improvement in volumetric capacity compared to other reported liquid electrolytes to date. This strategy revitalizes organosulfides for high-energy and low-cost energy storage applications.

Back to tab navigation

Supplementary files

Publication details

The article was received on 29 Jan 2019, accepted on 09 May 2019 and first published on 09 May 2019


Article type: Paper
DOI: 10.1039/C9EE00336C
Energy Environ. Sci., 2019, Accepted Manuscript

  •   Request permissions

    Asymmetric Allyl-Activation of Organosulfides for High-Energy Reversible Redox Flow Batteries

    G. Weng, B. Yang, C. Liu, G. Du, E. Y. Li and Y. Lu, Energy Environ. Sci., 2019, Accepted Manuscript , DOI: 10.1039/C9EE00336C

Search articles by author

Spotlight

Advertisements