This title appears in the Scientific Report :
2018
Please use the identifier:
http://dx.doi.org/10.1016/j.jpowsour.2017.12.069 in citations.
New insights into pre-lithiation kinetics of graphite anodes via nuclear magnetic resonance spectroscopy
New insights into pre-lithiation kinetics of graphite anodes via nuclear magnetic resonance spectroscopy
Pre-lithiation of anode materials can be an effective method to compensate active lithium loss which mainly occurs in the first few cycles of a lithium ion battery (LIB), due to electrolyte decomposition and solid electrolyte interphase (SEI) formation at the surface of the anode. There are many dif...
Saved in:
Personal Name(s): | Holtstiege, F |
---|---|
Schmuch, R / Winter, Martin / Brunklaus, Gunther (Corresponding author) / Placke, T (Corresponding author) | |
Contributing Institute: |
Helmholtz-Institut Münster Ionenleiter für Energiespeicher; IEK-12 |
Published in: | Journal of power sources, 378 (2018) S. 522-526 |
Imprint: |
New York, NY [u.a.]
Elsevier
2018
|
DOI: |
10.1016/j.jpowsour.2017.12.069 |
Document Type: |
Journal Article |
Research Program: |
Electrochemical Storage |
Publikationsportal JuSER |
Pre-lithiation of anode materials can be an effective method to compensate active lithium loss which mainly occurs in the first few cycles of a lithium ion battery (LIB), due to electrolyte decomposition and solid electrolyte interphase (SEI) formation at the surface of the anode. There are many different pre-lithiation methods, whereas pre-lithiation using metallic lithium constitutes the most convenient and widely utilized lab procedure in literature. In this work, for the first time, solid state nuclear magnetic resonance spectroscopy (NMR) is applied to monitor the reaction kinetics of the pre-lithiation process of graphite with lithium. Based on static 7Li NMR, we can directly observe both the dissolution of lithium metal and parallel formation of LiCx species in the obtained NMR spectra with time. It is also shown that the degree of pre-lithiation as well as distribution of lithium metal on the electrode surface have a strong impact on the reaction kinetics of the pre-lithiation process and on the remaining amount of lithium metal. Overall, our findings are highly important for further optimization of pre-lithiation methods for LIB anode materials, both in terms of optimized pre-lithiation time and appropriate amounts of lithium metal. |