This title appears in the Scientific Report :
2019
Please use the identifier:
http://dx.doi.org/10.1149/2.0491903jes in citations.
Please use the identifier: http://hdl.handle.net/2128/22368 in citations.
Electrochemical Performance of All-Solid-State Sodium-Ion Model Cells with Crystalline Na x CoO 2 Thin-Film Cathodes
Electrochemical Performance of All-Solid-State Sodium-Ion Model Cells with Crystalline Na x CoO 2 Thin-Film Cathodes
A common way to improve the electrochemical performance of the NaxCoO2 thin-film cathodes is to increase their crystallinity. Here we present our study of the electrochemical performance of all-solid-state sodium ion batteries with NaxCoO2 thin-film cathodes having two different degrees of crystalli...
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Personal Name(s): | Kehne, P. (Corresponding author) |
---|---|
Guhl, C. / Ma, Qianli / Tietz, F. / Alff, L. / Hausbrand, R. / Komissinskiy, P. | |
Contributing Institute: |
Werkstoffsynthese und Herstellungsverfahren; IEK-1 |
Published in: | Journal of the Electrochemical Society, 166 (2019) 3, S. A5328 - A5332 |
Imprint: |
Pennington, NJ
Electrochemical Soc.
2019
|
DOI: |
10.1149/2.0491903jes |
Document Type: |
Journal Article |
Research Program: |
Electrochemical Storage |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/22368 in citations.
A common way to improve the electrochemical performance of the NaxCoO2 thin-film cathodes is to increase their crystallinity. Here we present our study of the electrochemical performance of all-solid-state sodium ion batteries with NaxCoO2 thin-film cathodes having two different degrees of crystallinity tuned by their post-deposition annealing at 700°C. The NaxCoO2 cathode thin-films were grown by pulsed laser deposition onto a bulk Na3.4Sc0.4Zr1.6(SiO4)2(PO4) (Nasicon) solid electrolyte substrates and assembled with sodium metal into a Swagelok battery cells. Cells with the low-crystalline NaxCoO2 cathodes show discharge capacities of up to 124 mAh g−1 over 800 charge/discharged cycles. However, cells with highly crystalline NaxCoO2 cathodes revealed a significant capacity loss down to 9 mAh g−1 and a pronounced increase of the overpotential from 100 to 890 mV during the 200 cycles. The observed loss in capacity can be attributed to a strong increase of the interface resistance between the highly crystalline annealed NaxCoO2 films and Nasicon during cycling. |