Enhanced Fe(VI) cathode conductance and charge transfer: effects on the super-iron battery |
| |
| Institution: | 1. Institute of Geotechnics, Slovak Academy of Sciences, Watsonova 45, 04001 Košice, Slovak Republic;2. Institute of Nanotechnology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany;3. Department of Physics, State University of Maringá, Av. Colombo 5790, 87020-900 Maringá, Brazil;4. Faculty of Science and Technology, Keio University, 223-8522 Yokohama, Japan;5. Institute of Physical Chemistry and Electrochemistry, Leibniz University Hannover, Callinstr. 3-3a, 30167 Hannover, Germany;6. Center for Solid State Chemistry and New Materials, Leibniz University Hannover, Callinstr. 3-3a, 30167 Hannover, Germany;7. Institute of Physics, Faculty of Mining and Geology, VŠB−Technical University of Ostrava, 70833 Ostrava, Czechia;1. Karlsruhe Institute of Technology, Institute for Applied Materials (IAM), Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany;2. Karlsruhe Institute of Technology, Helmholtz Institute Ulm, Electrochemical Energy Storage, Albert-Einstein-Allee 11, D 89069 Ulm, Germany;1. College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, PR China;2. School of Metallurgy and Environment, Central South University, Changsha 410083, PR China;1. Faculty of Chemistry Innovative Centre, Studentski Trg 12-16, 11158 Belgrade, Serbia;2. Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Vojvode Stepe 444a, 11010 Belgrade, Serbia;3. University of Belgrade, Faculty of Biology, Studentski Trg 16, 11158 Belgrade, Serbia;4. Serbian Academy of Sciences and Arts, Knez Mihailova 35, 11158 Belgrade, Serbia;5. University of Belgrade, Faculty of Chemistry, Studentski Trg 16, P.O. Box 51, 11158 Belgrade, Serbia;6. Institute for Oncology and Radiology of Serbia, Pasterova 14, 11000 Belgrade, Serbia |
| |
| Abstract: | Cathodes comprising Fe(VI) salts are capable of three-electron reduction, and are useful for the formation of energetic ‘super-iron’ batteries. Material additions to the Fe(VI) cathode can be used to enhance the conductance and the efficiency of charge transfer to the cathode, and control the characteristics of the electrochemical storage. Whereas several common carbons are ineffective as conductive matrices for Fe(VI) reduction, several others such as small particle (1 μm) graphite, compressed carbon black, and fluorinated polymer graphites support efficient Fe(VI) 3e− reduction. Several inorganic salts also sustain Fe(VI) reduction, but at lower current densities. Titanates and other salts added to a K2FeO4 cathode improve the faradaic efficiency of Fe(VI) reduction at higher (∼3 mA cm−2) discharge current densities. Fluorinated polymer graphites provide an unusual additive to the Fe(VI) cathode mix, and at a low level (10 wt.%) addition can support efficient Fe(VI) reduction. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
