Dual-Functional Electrolyte Additive for Lithium-Sulfur Batteries Limits Lithium Dendrite Formation and Increases Sulfur Utilization Rate

Liu, Chang; Wu, Huiyuan; Wu, Jiachun; Xiao, Yinglin; Deng, Yonghong

2023-09-01

10.3390/batteries9090444

BATTERIES-BASEL   Impact Factor & Quartile

2313-0105

Lithium-sulfur batteries (LSBs) have received great attention as promising candidates for next-generation energy-storage systems due to their high theoretical energy density. However, their practical energy density is limited by a large electrolyte-to-sulfur (E/S) ratio (> 10 mu L electrolyte/mg s), and their cycle performance encounters challenges from electrode passivation and Li dendrite formation. In this work, a dual-functional electrolyte additive of tetraethylammonium nitrate (TEAN) is presented to address these issues. NO3- s a high-donor-number (DN) salt anion can promote polysulfide dissolution, increase sulfur utilization, and alleviate electrode passivation. The tetraethylammonium cation can adsorb around Li protrusions to form a lithiophobic protective layer to inhibit the formation of Li dendrites. TEAN LSBs show improving capacity, cycling stability, and higher coulombic efficiency under lean electrolyte (5 mu L-electrolyte/mg s) conditions.

lithium-sulfur batteries lean electrolyte conditions cationic surfactant

SCI

English

First ; Corresponding

The authors gratefully acknowledge the funding support from Key-Area Research and Development Program of Guangdong Province (2019B090908001), Science and Technology planning project of Guangdong Province (2020A0505090011), and Shenzhen Key Projects (JCYJ 2[2019B090908001] ; Key-Area Research and Development Program of Guangdong Province[2020A0505090011] ; Science and Technology planning project of Guangdong Province[JCYJ 20220818100218040]

Electrochemistry ; Energy & Fuels ; Materials Science

Electrochemistry ; Energy & Fuels ; Materials Science, Multidisciplinary

WOS:001072840600001

MDPI

Web of Science

Southern Univ Sci & Technol SUSTech, Sch Innovat & Entreprenourship, Shenzhen 518055, Peoples R China

Liu, Chang,Wu, Huiyuan,Wu, Jiachun,et al. Dual-Functional Electrolyte Additive for Lithium-Sulfur Batteries Limits Lithium Dendrite Formation and Increases Sulfur Utilization Rate[J]. BATTERIES-BASEL,2023,9(9).

Liu, Chang,Wu, Huiyuan,Wu, Jiachun,Xiao, Yinglin,&Deng, Yonghong.(2023).Dual-Functional Electrolyte Additive for Lithium-Sulfur Batteries Limits Lithium Dendrite Formation and Increases Sulfur Utilization Rate.BATTERIES-BASEL,9(9).

Liu, Chang,et al."Dual-Functional Electrolyte Additive for Lithium-Sulfur Batteries Limits Lithium Dendrite Formation and Increases Sulfur Utilization Rate".BATTERIES-BASEL 9.9(2023).