Flexible, Electrically Conductive, Nanostructured, Asymmetric Aerogel Films for Lithium-Sulfur Batteries

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Lulu Bai
  • Junsheng Ma
  • Hongquan Song
  • Ya Yang
  • Sang-Young Lee
  • Haipeng Yu
  • Shouxin Liu
  • Jian Li
  • Mingpeng Yu
  • Wenshuai Chen

Detail(s)

Original languageEnglish
Pages (from-to)59174-59184
Journal / PublicationACS Applied Materials and Interfaces
Volume13
Issue number49
Online published6 Dec 2021
Publication statusPublished - 15 Dec 2021

Abstract

Lithium-sulfur batteries are afflicted with capacity fading on account of polysulfide shuttling. A novel cost-effective electrode that can hinder the polysulfide shuttling and realize high active material utilization is highly required. Here, we demonstrate a flexible, electrically conductive, nanostructured, and asymmetric hybrid cathode by integrating a high-aspect-ratio wood nanocellulose and a low-cost commercial carbon nanotube (∼$ 0.2 g-1) into an entangled aerogel film. The vacuum filtration combined with lyophilization enables the aerogel film with quite different nanofiber/nanotube packing densities and pore structures at its two sides. The cooperative effects of the entangled building blocks and the asymmetric porous structure of the aerogel film stimulate the simultaneous increase of active sulfur loading, enhancing the electrolyte penetration, alleviating dissolution and shuttling of polysulfide ions, and promoting the fast electron transportation. The as-generated cathode exhibited a capacity fading of 0.01% per cycle over 1000 discharge/charge cycles at a 0.5 C rate (1 C = 1675 mA g-1). The average Coulombic efficiency reached ∼99.7%.

Research Area(s)

  • aerogel, carbon nanotube, lithium polysulfides, lithium-sulfur batteries, nanofibrillated cellulose

Citation Format(s)

Flexible, Electrically Conductive, Nanostructured, Asymmetric Aerogel Films for Lithium-Sulfur Batteries. / Bai, Lulu; Ma, Junsheng; Song, Hongquan; Yang, Ya; Zhi, Chunyi; Lee, Sang-Young; Yu, Haipeng; Liu, Shouxin; Li, Jian; Yu, Mingpeng; Chen, Wenshuai.

In: ACS Applied Materials and Interfaces, Vol. 13, No. 49, 15.12.2021, p. 59174-59184.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review