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| Hauptseite > Publikationsdatenbank > Ceramic batteries for electrochemical energy storage |
| Hauptseite > Publikationsdatenbank > Ceramic batteries for electrochemical energy storage |
| Abstract | FZJ-2018-04121 |
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2018
Abstract: Rechargeable high-performance batteries are essential for portable electronic devices and gain increasing importance in a transition scenario from fossil fuel based energy to zero emission technology, including electric cars and energy harvesting from volatile energy sources like solar and wind power. Among the various possibilities envisaged, solid-state batteries are currently seen as a highly promising solution to overcome the current limitations of conventional battery technologies such as the lack of long-term stability, limited safety, and low storage capacity. In solid-state batteries, the liquid electrolyte is completely replaced by a ceramic ion conductor, so that no highly flammable compound is present any more.This publication gives an overview of the different classes of solid lithium ion conductors, their properties, advantages and disadvantages as electrolytes, and the challenges associated with the processing of ceramic materials to full battery cells and their proper operation: While appropriate contact between electrodes and electrolyte can be easily achieved in battery cells with liquid electrolytes, a suitable contact with low charge transfer resistance in general requires a thermally or electric field activated deposition method for solids. Particularly, solid ion conductors tend to react with air and moisture, and with electrode materials during processing. Moreover – opposite to earlier assumptions in literature – lithium metal deposition inside of solid electrolytes may occur under certain operating conditions, thus leading to short circuits inside of the electrolyte. Sophisticated analysis methods like Secondary Ion Mass Spectrometry (SIMS) and further spectroscopic and diffraction techniques were introduced to gain significant insight into these effects. Finally, examples of fully functional solid-state batteries and their electrochemical performance will be presented.
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