Hexafluorophosphate anion intercalation into graphite electrode from sulfolane/ethylmethyl carbonate solutions. (20th January 2016)

• Record Type: Journal Article
• Authors: Fan, Hui; Gao, Jichao; Qi, Li; Wang, Hongyu
• Is Part Of: Electrochimica acta. Volume 189(2016)
• Page Start: 9
• Page End: 15
• Publication Date: 2016-01-20
• Subjects: Hexafluorophosphate -- Sulfolane -- Ethylmethyl carbonate -- Graphite intercalation compounds -- Solvation effect; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2015.12.078
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: The electrochemical behaviour of graphite positive electrode has been tested in the electrolyte solutions of 1 mol dm −3 LiPF6 dissolved in mixed solvents of sulfolane (SL) and ethylmethyl carbonate (EMC). The suppression of PF6 − anion intercalation into graphite by SL has been demonstrated. Moreover, the favourable effect of EMC on PF6 − insertion into graphite in SL-based solutions has been verified by ex situ XRD, ex situ Raman, and electrochemical tests. Furthermore, improved long-term cycling performance of graphite positive electrode has been obtained in solutions with suitable ratios of SL and EMC.