In Situ Analysis of the Li–O2 Battery with Thermally Reduced Graphene Oxide Cathode: Influence of Water Addition
| Autor: | Poul Norby, Mie Møller Storm, Mathias Christensen, Reza Younesi |
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| Rok vydání: | 2016 |
| Předmět: |
Battery (electricity)
Materials science Lithium vanadium phosphate battery Inorganic chemistry 02 engineering and technology Electrolyte Overpotential 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Nanowire battery Cathode 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention General Energy law Physical and Theoretical Chemistry Primary cell 0210 nano-technology |
| Zdroj: | The Journal of Physical Chemistry C. 120:21211-21217 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/acs.jpcc.6b06018 |
| Popis: | The Li–O2 battery technology holds the promise to deliver a battery with significantly increased specific energy compared to today’s Li-ion batteries. As a cathode support material, reduced graphene oxide has received increasing attention in the Li–O2 battery community due to the possibility of increased discharge capacity, increased battery cyclability, and decreased charging overpotential. In this article we investigate the effect of water on a thermally reduced graphene oxide cathode in a Li–O2 battery. Differential electrochemical mass spectroscopy reveals a decreased electron count for batteries with 1000 ppm water added to the electrolyte in comparison to dry batteries, indicating additional parasitic electrochemical or chemical processes. A comparable capacity of the wet and dry batteries indicates that the reaction mechanism in the Li–O2 battery also depends on the surface of the cathode and not only on addition of water to the electrolyte as demonstrated by the solution-based mechanism. In situ s... |
| Databáze: | OpenAIRE |
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