Cationic surfactant for lithium-sulfur batteries enables efficient use of sulfur and limits lithium dendrite formation

Xiao, Yinglin1,2; Liu, Zhongbo3; Wu, Jiachun1; Liu, Chang1; Peng, Yanqiu4; Fan, Yanchen1,5; Chang, Jian1; Zheng, Zijian6; Huang, Wei5,7,8; Chen, Guohua9; Deng, Yonghong1

2023-11-15

10.1016/j.xcrp.2023.101658

CELL REPORTS PHYSICAL SCIENCE   影响因子和分区

2666-3864

Lithium-sulfur batteries (LSBs) are promising energy-storage systems due to their high theoretical energy density. However, LSBs' practical energy density is limited by a large electrolyte-to-sulfur (E/S) ratio (>5 mL mg (-1) S), and their reversible operation encounters challenges from electrode passivation and Li dendrite formation. Herein, we report a strategy for enhancing LSBs' performance by using a cationic surfactant-based electrolyte additive: tetramethylammonium hexafluorophosphate (TAHP). The stronger electrostatic interaction between the tetramethylammonium cation and the short-chain polysulfide (PS) anion promotes the reduction of long chain PS to short-chain PS, inducing 3D particulate deposition of Li2S and thus increasing both sulfur utilization and discharge potential, alleviating electrode passivation. Moreover, tetramethylammonium cations can adsorb around Li protrusions to form a lithiophobic protective layer that inhibits the formation of Li dendrites. As a result, the TAHP lithium-sulfur pouch cell maintained an excellent capacity retention ratio with 78.3% after 250 cycles under lean -electrolyte conditions (4.5 mL mg( -1) sufur [S]).

SCI

英语

第一 ; 通讯

Key Area Research and Development Program of Guangdong Province[2019B090908001] ; Science and Technology Planning Project of Guangdong Province[2020A0505090011] ; Shenzhen Key Projects[JCYJ 20220818100218040] ; Guangdong Provincial Key Laboratory of Energy Materials for Electric Power[2018B030322001]

Chemistry ; Energy & Fuels ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Energy & Fuels ; Materials Science, Multidisciplinary ; Physics, Multidisciplinary

WOS:001114585300001

CELL PRESS

Web of Science

1.Southern Univ Sci & Technol SUSTech, Dept Mat Sci & Engn, Guangdong Prov Key Lab Energy Mat Elect Power, Shenzhen 518055, Peoples R China
2.Xinyu Univ, Sch New Energy Sci & Engn, Xinyu City 338000, Jiangxi, Peoples R China
3.Shenzhen Capchem Technol Co Ltd, Shenzhen 518118, Guangdong, Peoples R China
4.EVE Energy Co Ltd, Huizhou 516006, Peoples R China
5.Petro China Shenzhen Renewable Energy Res Inst Co, Shenzhen 518000, Peoples R China
6.Hong Kong Polytech Univ, Inst Text & Clothing ITC, Hong Kong 999077, Peoples R China
7.Southern Univ Sci & Technol, Digital Econ Res Ctr De Fin, Natl Ctr Appl Math Shenzhen NCAMS, Shenzhen 518055, Peoples R China
8.Southern Univ Sci & Technol, Coll Business, Shenzhen 518055, Peoples R China
9.City Univ Hong Kong, Sch Energy & Environm, Kowloon, Tat Chee Ave, Hong Kong, Peoples R China

Xiao, Yinglin,Liu, Zhongbo,Wu, Jiachun,et al. Cationic surfactant for lithium-sulfur batteries enables efficient use of sulfur and limits lithium dendrite formation[J]. CELL REPORTS PHYSICAL SCIENCE,2023,4(11).

Xiao, Yinglin.,Liu, Zhongbo.,Wu, Jiachun.,Liu, Chang.,Peng, Yanqiu.,...&Deng, Yonghong.(2023).Cationic surfactant for lithium-sulfur batteries enables efficient use of sulfur and limits lithium dendrite formation.CELL REPORTS PHYSICAL SCIENCE,4(11).

Xiao, Yinglin,et al."Cationic surfactant for lithium-sulfur batteries enables efficient use of sulfur and limits lithium dendrite formation".CELL REPORTS PHYSICAL SCIENCE 4.11(2023).