TY  - JOUR
AU  - Wu, Baolin
AU  - Chen, Chunguang
AU  - Danilov, Dmitri L.
AU  - Jiang, Ming
AU  - Raijmakers, Luc H. J.
AU  - Eichel, Rüdiger-A.
AU  - Notten, Peter H. L.
TI  - Influence of the SEI formation on the stability and lithium diffusion in Si electrodes
JO  - ACS omega
VL  - 7
IS  - 36
SN  - 2470-1343
CY  - Washington, DC
PB  - ACS Publications
M1  - FZJ-2022-03083
SP  - 32740 - 32748
PY  - 2022
AB  - Silicon (Si) is an attractive anode material for Li-ion batteries (LIBs) due to its high theoretical specific capacity. However, the solid–electrolyte interphase (SEI) formation, caused by liquid electrolyte decomposition, often befalls Si electrodes. The SEI layer is less Li-ion conductive, which would significantly inhibit Li-ion transport and delay the reaction kinetics. Understanding the interaction between the SEI components and Li-ion diffusion is crucial for further improving the cycling performance of Si. Herein, different liquid electrolytes are applied to investigate the induced SEI components, structures, and their role in Li-ion transport. It is found that Si electrodes exhibit higher discharge capacities in LiClO4-based electrolytes than in LiPF6-based electrolytes. This behavior suggests that a denser and more conductive SEI layer is formed in LiClO4-based electrolytes. In addition, a coating of a Li3PO4 artificial SEI layer on Si suppresses the formation of natural SEI formation, leading to higher capacity retentions. Furthermore, galvanostatic intermittent titration technique (GITT) measurements are applied to calculate Li-ion diffusion coefficients, which are found in the range of 10–23–10–19 m2/s.
LB  - PUB:(DE-HGF)16
C6  - 36120060
UR  - <Go to ISI:>//WOS:000855059100001
DO  - DOI:10.1021/acsomega.2c04415
UR  - https://juser.fz-juelich.de/record/909247
ER  -