"Labor für zuverlässige, batteriegestützte Energiewandlung" (BAEW) Hannover Messe 2021 Power Electronics Functional Nanomaterials Kiel University
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“Labor für zuverlässige, batteriegestützte
Energiewandlung” (BAEW)
Hannover Messe 2021
Power Electronics
Functional Nanomaterials
Kiel University
BAEW: Batteries, here, why?
Prof. R. A. Huggins, Stanford University, Material Science
-> 2007 Silicon, Nature Nanotech.
-> Professor H. C. at the Faculty of Engineering in Kiel until
~2006
General materials science chair Prof. H. Föll,
„Gründungs“dean:
Mechanical engineer to chemist (2008): What is an
ideal battery? Interdisciplinary research
2008 student Sandra Hansen as student researcher AG Föll
2009-10 Patent
2014 first patent sold to Samsung
2010-today various third party funded projects
2012-today, cathode development
2020-2023 from basic research to industry (BAEW lab)
BAEW: Batteries, here, why?
Prof. R. A. Huggins, Stanford University, Material Science
-> 2007 Silicon, Nature Nanotech.
-> Professor H. C. at the Faculty of Engineering in Kiel until
~2006
General materials science chair Prof. H. Föll,
„Gründungs“dean:
Mechanical engineer to chemist (2008): What is an
ideal battery? Interdisciplinary research
2008 student Sandra Hansen as student researcher AG Föll
2009-10 Patent
2014 first patent sold to Samsung
2010-today various third party funded projects
2012-today, cathode development
2020-2023 from basic research to industry (BAEW lab)
Battery materials…
Potential vs. Li/Li+ [V]
anode materials
NCM*NCA
* cathode materials
4
VxOy
MnO2 > 400 Wh/kg
3
Sulfur
Si/C-composite
2 LiTixOy
1 Silicon
Carbon
Graphite* Li
500 1000 1500 2000 2500 3000 3500 4000
Gravimetric capacity [mAh/g]
Challenges
Graphite: Silicon:
Graphite (LiC6) ~ 372 mAh/g Silicon (Li22Si5) ~ 4200 mAh/g
I. discharge II. charge I. discharge II. charge
intact
Small volume change 400%
Very large volume expansion
1. Generation Silicon Anodes
contact
Microwire Anodes
1 cm
5 µm
30 µm
Quiroga et al. 2013, Hansen et al. 2017
~70 µm long ~1 µm thick
Lift-off
Our solution of innovative silicon
anodes of the 1. Generation
c) d) Cu
1 µm 11µm
µm 1 µm 200 nm 2 µm 200 nm
20 µm
1 cm 100 µm
Hansen et al. J. Power Sources, 381 (2018) Hansen et al. Nachrichten der Chemie, 66 (2018)
Fast charging capability
Fast charging times at high capacity
Hansen et al., J.Power Sources, 381 , 2018
3500
Specific Capacity [mAh/g]
600 300 120 60 30 12 min. initial
3000
PC
2500 PC+DME
DME
2000 DMC
LiTfSi
1500 DOL
1 µm
1000
after cycling:
500
0
600 300 120 60 30 12 min.
C/10 C/5 C/2 C 2C 5C
Discharge/charge rate
1 µm
..reproducible but expensive
2. Generation silicon anodes
Safe, sustainable and
highly energetic silicon
anodes
3200
Specific Capacity [mAh/g] 3000
charge
Copyright: Julia Siekmann, Uni Kiel 2800 discharge
2600
2400
Easy and scalable 2200
production 2000
1800
1600
0 20 40 60 80 100
Cycle Number
2. Generation silicon anodes
Safe, sustainable and
highly energetic silicon
anodes
3200
Specific Capacity [mAh/g] 3000
charge
Copyright: Julia Siekmann, Uni Kiel 2800 discharge
2600
2400
Easy and scalable 2200
production 2000
1800
1600
0 20 40 60 80 100
Cycle NumberSulfur Cathodes
▪ low electrical conductivity Sulfur
▪ Highly conductive carbon network necessary
▪ challenge: Shuttle Effect + volume change
▪ High sulfur loading necessary (>6 mgS/cm²) Lithium
▪ → solution: nanomaterials in form of 3D structures
Hierarchical structure
+ sulfur
50µm
F. Schütt et al., Nature Communications, 9(1), 1215 (2017).
H. Cavers et al., ACS Omega, 5, 43, 28196–28203(2020).Sulfur Cathodes
▪ low electrical conductivity Sulfur
▪ Highly conductive carbon network necessary
▪ challenge: Shuttle Effect + volume change
▪ High sulfur loading necessary (>6 mgS/cm²) Lithium
▪ → solution: nanomaterials in form of 3D structures
Hierarchical structure
+ sulfur
50µm
F. Schütt et al., Nature Communications, 9(1), 1215 (2017).
H. Cavers et al., ACS Omega, 5, 43, 28196–28203(2020).BAEW: Battery technology and
Power Electronics together
✓ Fast charging
✓ Second Life
applications
✓ Efficiency and
SmartnessBatteries for renewable
energysystems and e-mobility
Our local strength
✓ Cooperation with local industry
✓ Power Electronics Network
✓ EU Interreg
Kopernicus
ENSURE
Smart Transformer
HEART
Erasmus
Mundus
Marie Curie Master
Project
Schwerpunkt Programm
Multimodale und Hybrid NetzeContacts: • Prof. Dr. Marco Liserre, Chair of Power Electronics phone: +49 431 880-6100 mail: ml@tf.uni-kiel.de • Prof. Dr. Rainer Adelung Functional Nanomaterials phone: +49 431 880-6116 mail: ra@tf.uni-kiel.de • Dr. Sandra Hansen Functional Nanomaterials phone: +49 431 880-6337 mail: sn@tf.uni-kiel.de
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