Eco-friendly Energy Storage System: Seawater and Ionic Liquid Electrolyte

ChemSusChem. 2016 Jan 8;9(1):42-9. doi: 10.1002/cssc.201501328. Epub 2015 Nov 27.


As existing battery technologies struggle to meet the requirements for widespread use in the field of large-scale energy storage, novel concepts are urgently needed concerning batteries that have high energy densities, low costs, and high levels of safety. Here, a novel eco-friendly energy storage system (ESS) using seawater and an ionic liquid is proposed for the first time; this represents an intermediate system between a battery and a fuel cell, and is accordingly referred to as a hybrid rechargeable cell. Compared to conventional organic electrolytes, the ionic liquid electrolyte significantly enhances the cycle performance of the seawater hybrid rechargeable system, acting as a very stable interface layer between the Sn-C (Na storage) anode and the NASICON (Na3 Zr2 Si2 PO12) ceramic solid electrolyte, making this system extremely promising for cost-efficient and environmentally friendly large-scale energy storage.

Keywords: energy storage system; ionic liquid; rechargeable; seawater; sodium.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Ceramics
  • Electric Power Supplies*
  • Electrochemistry
  • Electrodes
  • Electrolytes / chemistry*
  • Ionic Liquids / chemistry*
  • Microscopy, Electron, Scanning
  • Seawater / chemistry*
  • Surface Properties


  • Electrolytes
  • Ionic Liquids