Polyfluorinated boron cluster – [B 12F 11H] 2− – based electrolytes for supercapacitors: Overcharge protection

• Published in: Electrochemistry communications Vol. 12; no. 5; pp. 636 - 639
• Main Authors: Ionica-Bousquet, C.M., Casteel, W.J., Pearlstein, R.M., GirishKumar, G., Pez, G.P., Gómez-Romero, P., Palacín, M.R., Muñoz-Rojas, D.
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 01-05-2010; Amsterdam Elsevier; New York, NY
• Subjects: Applied sciences; Capacitors. Resistors. Filters; Electrical engineering. Electrical power engineering; Exact sciences and technology; Fluoborate; Nonaqueous electrolyte; Overcharge protection; Polyfluorododecaborate; Pseudocapacitance; Quaternary ammonium; Supercapacitor; Various equipment and components; Fluoborate; Polyfluorododecaborate; Quaternary ammonium; Supercapacitor; Nonaqueous electrolyte; Overcharge protection; Pseudocapacitance; Cycling; Cage compound; Electrolyte solution; Fluorine Compounds; Fluoborates; Secondary cell; Electrolytic capacitor; Quaternary ammonium compound; Overvoltage protection; Non aqueous solvent; Boron Compounds; Electrical characteristic
• ISSN: 1388-2481; 1873-1902
• DOI: 10.1016/j.elecom.2010.02.018

Redox-active polyfluorododecaborate cluster ions, [B
12F
x
H
12
−
x
]
2−, were investigated as electrolytes for electrochemical double layer capacitors. In particular, the performance of tetraethylammonium undecafluorododecaborate, (Et
4N)
2B
12F
11H, was compared against a standard electrolyte made with tetraethylammonium tetrafluoroborate (Et
4NBF
4). Overcharge tests in single cells and in cells assembled in series demonstrated that the redox-active anion can be effectively used as a shuttle to reduce solvent degradation under harsh conditions, thus extending cell life.