Reactivation of Dissolved Polysulfides with Nitrogen Doped Graphene Decorated Carbon Cloth as an Effective Interlayer for Magnesium-Sulfur Battery

25 Pages Posted: 13 Mar 2024

See all articles by Bosu Dasari

Bosu Dasari

affiliation not provided to SSRN

Mohsen Sotoudeh

Ulm University

Liping Wang

affiliation not provided to SSRN

Zhenyou Li

affiliation not provided to SSRN

Thomas Diemant

affiliation not provided to SSRN

Guruprakash Karkera

affiliation not provided to SSRN

EbrahimAbouzari Lotf

Karlsruhe Institute of Technology

Axel Groß

Ulm University

Maximilian Fichtner

affiliation not provided to SSRN

Zhirong Zhao-Karger

affiliation not provided to SSRN

Abstract

The theoretically high energy densities and wide availability of active materials have led to great interest in the development of magnesium-sulfur (Mg-S) batteries. However, poor electronic conductivity of sulfur, active material dissolution, polysulfide shuttling and poor cycling stability are major challenges that need to be tackled. Herein we observed the pristine Mg-S cell faces significant overcharging issues and cell failure is common with in 30 cycles with significant capacity decay.  With the help of XRD and elemental mapping realized that the dissolved liquid polysulfides are metastable in nature. Due to the high sulfophilic nature of the separator, polysulfide absorption leads to slow crystal growth inside the separator. This active material trapping might be the reason for quick capacity decay. We attempted to revive the dissolved polysulfides by introducing conductive nitrogen-doped graphene (N-gpn)@Carbon cloth interlayer between the electrodes and separator. This interlayer has a high polysulfide absorption nature, which allows the battery to demonstrate an initial capacity of 1075 mAh g-1 and increased cycling stability to 100 cycles. However, this stability was further enhanced to 300 cycles by protecting the anode. Theoretical considerations suggest that among all polysulfides, MgS8, has the strongest interaction with N-gpn and can be trapped most favorably in a defective N-gpn. This leads to enhanced utilization of the active material and improved cycling stability.

Keywords: Magnesium-Sulfur battery, solid magnesium polysulfides, nitrogen-doped graphene, interlayer, carbon cloth, anode protection

Suggested Citation

Dasari, Bosu and Sotoudeh, Mohsen and Wang, Liping and Li, Zhenyou and Diemant, Thomas and Karkera, Guruprakash and Lotf, EbrahimAbouzari and Groß, Axel and Fichtner, Maximilian and Zhao-Karger, Zhirong, Reactivation of Dissolved Polysulfides with Nitrogen Doped Graphene Decorated Carbon Cloth as an Effective Interlayer for Magnesium-Sulfur Battery. Available at SSRN: https://ssrn.com/abstract=4758428 or http://dx.doi.org/10.2139/ssrn.4758428

Bosu Dasari (Contact Author)

affiliation not provided to SSRN ( email )

No Address Available

Mohsen Sotoudeh

Ulm University ( email )

Albert-Einstein-Alee 11
Ulm, D-89081
Germany

Liping Wang

affiliation not provided to SSRN ( email )

No Address Available

Zhenyou Li

affiliation not provided to SSRN ( email )

No Address Available

Thomas Diemant

affiliation not provided to SSRN ( email )

No Address Available

Guruprakash Karkera

affiliation not provided to SSRN ( email )

No Address Available

EbrahimAbouzari Lotf

Karlsruhe Institute of Technology ( email )

Kaiserstraße 12
Karlsruhe, 76131
Germany

Axel Groß

Ulm University ( email )

Albert-Einstein-Alee 11
Ulm, D-89081
Germany

Maximilian Fichtner

affiliation not provided to SSRN ( email )

No Address Available

Zhirong Zhao-Karger

affiliation not provided to SSRN ( email )

No Address Available

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