On improvements of sodium manganese oxide materials as sodium-ion battery cathode
Mainly due to potential cost advantages sodium-ion batteries have the potential to become an alternative to lithium-ion batteries. In this work strategies to improve cycling stability of the cathode material P2-NaxMnO2 are presented. Cobalt-doping on the order of 10% leads to a suppression of struct...
| Main Author: | |
|---|---|
| Other Authors: | |
| Format: | Thesis |
| Language: | English |
| Published: |
2018
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/88417 http://hdl.handle.net/10220/45953 |
| _version_ | 1811690768554786816 |
|---|---|
| author | Bucher, Nicholas Joachim |
| author2 | Maria-Elisabeth Michel-Beyerle |
| author_facet | Maria-Elisabeth Michel-Beyerle Bucher, Nicholas Joachim |
| author_sort | Bucher, Nicholas Joachim |
| collection | NTU |
| description | Mainly due to potential cost advantages sodium-ion batteries have the potential to become an alternative to lithium-ion batteries. In this work strategies to improve cycling stability of the cathode material P2-NaxMnO2 are presented. Cobalt-doping on the order of 10% leads to a suppression of structural changes, resulting in improved
cyclability, and enhanced Na+ diffusion kinetics. Moreover, capacity and cyclability can
be increased by an optimization of the morphology. A combination of both strategies
leads to a material with comparably best discharge capacity and cycling stability.
Natrium-Ionen-Batterien gelten hauptsächlich aufgrund potenzieller Kostenvorteile als
mögliche Alternative zu Lithium-Ionen-Batterien. Diese Arbeit beschreibt Strategien
zur Verbesserung der Zyklenstabilität von P2-NaxMnO2 als Kathodenmaterial. Eine
~10%ige Cobalt-Substitution bewirkt eine Unterdrückung von Strukturumwandlungen
und eine Verbesserung der Na+-Diffusion. Des Weiteren kann die Kapazität und
Zyklenstabilität durch eine Optimierung der Morphologie verbessert werden. Die
Kombination beider Strategien vereint die jeweiligen Vorteile und führt zu einem
Material mit hoher Kapazität und vergleichsweise bester Zyklenstabilität.
This doctoral thesis is the cumulative integration of the scientific publications resulting
from my work as a research associate at TUM CREATE. After a brief overview of
different battery technologies, sodium-ion batteries are described in detail, followed by
a description of the main experimental methods employed in this work. Subsequently,
my four scientific publications, as well as one further publication in which my
contribution was crucial, are presented. The thesis is concluded with a discussion of
the presented results. |
| first_indexed | 2024-10-01T06:09:15Z |
| format | Thesis |
| id | ntu-10356/88417 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:09:15Z |
| publishDate | 2018 |
| record_format | dspace |
| spelling | ntu-10356/884172023-03-04T16:37:42Z On improvements of sodium manganese oxide materials as sodium-ion battery cathode Bucher, Nicholas Joachim Maria-Elisabeth Michel-Beyerle School of Materials Science & Engineering Technical University of Munich Madhavi Srinivasan DRNTU::Engineering::Materials::Energy materials Mainly due to potential cost advantages sodium-ion batteries have the potential to become an alternative to lithium-ion batteries. In this work strategies to improve cycling stability of the cathode material P2-NaxMnO2 are presented. Cobalt-doping on the order of 10% leads to a suppression of structural changes, resulting in improved cyclability, and enhanced Na+ diffusion kinetics. Moreover, capacity and cyclability can be increased by an optimization of the morphology. A combination of both strategies leads to a material with comparably best discharge capacity and cycling stability. Natrium-Ionen-Batterien gelten hauptsächlich aufgrund potenzieller Kostenvorteile als mögliche Alternative zu Lithium-Ionen-Batterien. Diese Arbeit beschreibt Strategien zur Verbesserung der Zyklenstabilität von P2-NaxMnO2 als Kathodenmaterial. Eine ~10%ige Cobalt-Substitution bewirkt eine Unterdrückung von Strukturumwandlungen und eine Verbesserung der Na+-Diffusion. Des Weiteren kann die Kapazität und Zyklenstabilität durch eine Optimierung der Morphologie verbessert werden. Die Kombination beider Strategien vereint die jeweiligen Vorteile und führt zu einem Material mit hoher Kapazität und vergleichsweise bester Zyklenstabilität. This doctoral thesis is the cumulative integration of the scientific publications resulting from my work as a research associate at TUM CREATE. After a brief overview of different battery technologies, sodium-ion batteries are described in detail, followed by a description of the main experimental methods employed in this work. Subsequently, my four scientific publications, as well as one further publication in which my contribution was crucial, are presented. The thesis is concluded with a discussion of the presented results. Doctor of Philosophy 2018-09-11T07:35:20Z 2019-12-06T17:02:53Z 2018-09-11T07:35:20Z 2019-12-06T17:02:53Z 2018 Thesis Bucher, N. J. (2018). On improvements of sodium manganese oxide materials as sodium-ion battery cathode. Doctoral thesis, Nanyang Technological University, Singapore. https://hdl.handle.net/10356/88417 http://hdl.handle.net/10220/45953 10.32657/10220/45953 en 124 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Materials::Energy materials Bucher, Nicholas Joachim On improvements of sodium manganese oxide materials as sodium-ion battery cathode |
| title | On improvements of sodium manganese oxide materials as sodium-ion battery cathode |
| title_full | On improvements of sodium manganese oxide materials as sodium-ion battery cathode |
| title_fullStr | On improvements of sodium manganese oxide materials as sodium-ion battery cathode |
| title_full_unstemmed | On improvements of sodium manganese oxide materials as sodium-ion battery cathode |
| title_short | On improvements of sodium manganese oxide materials as sodium-ion battery cathode |
| title_sort | on improvements of sodium manganese oxide materials as sodium ion battery cathode |
| topic | DRNTU::Engineering::Materials::Energy materials |
| url | https://hdl.handle.net/10356/88417 http://hdl.handle.net/10220/45953 |
| work_keys_str_mv | AT buchernicholasjoachim onimprovementsofsodiummanganeseoxidematerialsassodiumionbatterycathode |