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

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

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1 Citation (Scopus)


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%.

Original languageEnglish
Pages (from-to)59174-59184
Number of pages11
JournalACS Applied Materials and Interfaces
Issue number49
Publication statusPublished - 2021 Dec 15

Bibliographical note

Funding Information:
This work was supported in part by the National Natural Science Foundation of China (nos. 31922056, 31770594, and 51702012), the Funds supported by the Fok Ying-Tong Education Foundation, China (no. 161025), and the Fundamental Research Funds for the Central Universities (grant no. 2572018CG01).

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)


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