Intercalation manners of perchlorate anion into graphite electrode from organic solutions. (10th September 2015)

• Record Type: Journal Article
• Authors: Gao, Jichao; Tian, Shengfeng; Qi, Li; Wang, Hongyu
• Is Part Of: Electrochimica acta. Volume 176(2015)
• Page Start: 22
• Page End: 27
• Publication Date: 2015-09-10
• Subjects: Perchlorate anion -- Solvents -- Graphite intercalation compounds -- in situ Raman spectroscopy -- Electrochemical capacitors; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2015.06.152
• Languages: English
• ISSNs: 0013-4686

Abstract

Highlights: EC suppresses ClO4 − insertion into graphite. ex situ XRD results indicate co-intercalation of GBL with anion. Elevating temperatures enlarge storage capacity of EC-solvated ClO4 − . Transport of EC-solvated anion inside graphite is sluggish. Abstract: Anion graphite intercalation compounds are an excellent candidate for high-potential positive electrode materials. Solvents play an important role during the intercalation processes of anions into graphite. In this contribution, the intercalation behaviors of perchlorate (ClO4 − ) from propylene carbonate (PC), γ-butyrolactone (GBL) and ethylene carbonate (EC) were studied with activated carbon (AC)/graphite capacitors. Both in situ Raman spectroscopy and ex situ X-ray diffraction were employed to detect the structure change of graphite electrodes caused by the electrochemical intercalation of ClO4 − . Influence of solvents on the insertion of ClO4 − was discussed. Besides, temperature effect was also explored.