2024-03-28T18:16:15Z
https://soar-ir.repo.nii.ac.jp/oai
oai:soar-ir.repo.nii.ac.jp:00021067
2022-12-14T04:18:35Z
1221:1222
Suppressing the effect of lithium dendritic growth by the addition of magnesium bis(trifluoromethanesulfonyl)amide
Shimizu, Masahiro
Umeki, Makoto
Arai, Susumu
Practical applications of Li-S and Li-air batteries require the morphology of the Li metal negative electrode during charge/discharge (i.e., Li-deposition/dissolution) cycling to be precisely controlled. Herein, we used magnesium bis(trifluoromethanesulfonyl)amide [Mg(TFSA)(2)] as an electrolyte additive to suppress the growth of Li dendrites, utilizing the occurrence of an alloying reaction between the initially substrate-deposited Mg and the subsequently deposited Li. Notably, no metallic Mg formation and no change in Li deposition morphology were observed at an electrolyte composition of 0.1 M Mg(TFSA)(2) + 0.9 M LiTFSA/triglyme, irrespective of the applied potential. In contrast, increasing the Mg salt concentration to 0.5 M resulted in the deposition of interconnected granules, reflecting a dramatic morphology improvement. X-ray diffraction analysis revealed the occurrence of the abovementioned alloying, which finally afforded a deposit composition of Li0.9Mg0.1 via the formation of an intermediate Li0.14Mg0.86 phase. Importantly, the deposits obtained under various applied potentials were relatively smooth, with no needle-like morphology observed.
Article
PHYSICAL CHEMISTRY CHEMICAL PHYSICS.20(2):1127-1133(2018)
journal article
ROYAL SOC CHEMISTRY
2017-12-05
application/pdf
application/pdf
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
2
20
1127
1133
1463-9076
AA11301773
https://soar-ir.repo.nii.ac.jp/record/21067/files/16H06838_02.pdf
https://soar-ir.repo.nii.ac.jp/record/21067/files/16H06838_02_SupplementaryData.pdf
eng
10.1039/c7cp06057b
https://doi.org/10.1039/c7cp06057b