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4825464 
Journal Article 
Fluorine-free Water-in-Salt Electrolyte for Green and Low-cost Aqueous Sodium-Ion Batteries 
Han, J; Zhang, H; Varzi, A; Passerini, S 
2018 
Yes 
ChemSusChem
ISSN: 1864-5631
EISSN: 1864-564X 
English 
30222910 
The highly concentrated "Water-in-Salt" electrolyte (WiSE) containing sodium acetate and potassium acetate demonstrates peculiar performance (specific capacity of 37 mAh g-1 at 5th cycle and average discharge voltage of 0.82 V) in aqueous sodium-ion batteries (SIBs) based on Na2MnFe(CN)6 and NaTi2(PO4)3. The fluorine-free electrolyte offers wide electrochemical stability window and compatibility with Al current collector. The electrolyte, current collector and the electrode materials based on abundant elements make the proposed battery chemistry safe, low-cost and environmental friendly.