Multifunctional tri-layer aramid nanofiber composite separators for high-energy-density lithium-sulfur batteries

Pei，Huijie1; Guan，Xin1; Chen，Xiaoyu1; Chen，Yi1; Yang，Yufei1; Wen，Yingfeng1; Nie，Hui1; Chang，Li2; Zhou，Xingping1; Xie，Xiaolin1; Ye，Lin3; Mai，Yiu Wing1,4

2024-07-01

10.1016/j.nanoen.2024.109680

Nano Energy   影响因子和分区

2211-2855

Lithium-sulfur (Li-S) battery has attracted much attention due to their high theoretical energy density. However, severe shuttling effect, sluggish reaction kinetics and uncontrolled dendrite formation of Li anode greatly deter their practical applications. Different to conventional separator engineering strategies that are always focused on surface coating of functional interlayer on commercial polyolefin separators, herein, we proposed a structural engineering tactic by rationally tuning the porous structure and composition of the p-aramid nanofiber (ANF) composite separator to address simultaneously the above problems. A two-step film-casting process combined with a phase inversion approach was developed to fabricate a multifunctional tri-layer ANF composite separator. This innovative separator was especially engineered to comprise a conductive and catalytic NiFeO modified multi-walled carbon nanotubes/ANF layer for rapid and efficient conversion of lithium polysulfides, a microporous ANF layer for fast ion transport, and a dense nanoporous ANF layer for lithium dendrite inhibition. This tri-layer ANF-based separator possessed high porosity, excellent thermal stability, and superb electrolyte wettability. Batteries with the tri-layer ANF- based separator exhibited outstanding cyclic stability with high capacity of >3 mAh cm at high sulfur loading (4 mg cm) and high current density (4 mA cm). This work opens up new opportunities for design of functional separators based on high performance polymers using the structural engineering strategy.

Aramid nanofibers High-energy-density batteries Li dendrites growth Li-S batteries Lithium polysulfides shuttling Tri-layer separators

SCI ; EI

英语

其他

20241916045562

Aramid fibers ; Iron compounds ; Lithium batteries ; Lithium compounds ; Lithium sulfur batteries ; Multiwalled carbon nanotubes (MWCN) ; Nickel compounds ; Polysulfides ; Porosity ; Separators ; Structural design

Structural Design, General:408.1 ; Electric Batteries and Fuel Cells:702 ; Primary Batteries:702.1.1 ; Secondary Batteries:702.1.2 ; Nanotechnology:761 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804 ; Organic Polymers:815.1.1 ; Synthetic Rubber:818.2.1 ; Synthetic Fibers:819.2 ; Physical Properties of Gases, Liquids and Solids:931.2 ; Crystalline Solids:933.1

2-s2.0-85192188950

Scopus

1.Key Laboratory of Material Chemistry for Energy Conversion and Storage,Ministry of Education,School of Chemistry and Chemical Engineering,Huazhong University of Science and Technology,Wuhan,430074,China
2.Centre for Advanced Materials Technology (CAMT),School of Aerospace,Mechanical and Mechatronic Engineering J07,The University of Sydney,Sydney,2006,Australia
3.School of System Design and Intelligent Manufacturing (SDIM),Southern University of Science and Technology,Shenzhen,518055,China
4.Department of Mechanical Engineering,The Hong Kong Polytechnic University,Kowloon,Hung Hom,Hong Kong

Pei，Huijie,Guan，Xin,Chen，Xiaoyu,et al. Multifunctional tri-layer aramid nanofiber composite separators for high-energy-density lithium-sulfur batteries[J]. Nano Energy,2024,126.

Pei，Huijie.,Guan，Xin.,Chen，Xiaoyu.,Chen，Yi.,Yang，Yufei.,...&Mai，Yiu Wing.(2024).Multifunctional tri-layer aramid nanofiber composite separators for high-energy-density lithium-sulfur batteries.Nano Energy,126.

Pei，Huijie,et al."Multifunctional tri-layer aramid nanofiber composite separators for high-energy-density lithium-sulfur batteries".Nano Energy 126(2024).