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author:

Bi, T. (Bi, T..) [1] | Zheng, W. (Zheng, W..) [2] | Zhou, Y. (Zhou, Y..) [3] | Lin, Q. (Lin, Q..) [4] | Zhang, X. (Zhang, X..) [5]

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Scopus

Abstract:

The effective solution to current energy and environmental issues lies in the advancement of renewable energy conversion and storage technologies. In this work, an ultra-thin-walled hierarchical porous carbon (UHPC) with fluffy three-dimensional (3D) interconnected network structure was synthesized by pyrolysis of petroleum residue and aluminum isopropoxide. Then, a nitrogen‑sulfur co-doped UHPC (NS-UHPC) was prepared and employed as a sulfur-loading host to achieve NS-UHPC@S composite after sulfur impregnation. After that, the electrochemical performances are explored utilizing the NS-UHPC@S composite as electrode active material for lithium‑sulfur battery (LSB). The as-prepared NS-UHPC possesses a specific surface area of 1031.32 m2 g−1 and a pore volume of 0.82 cm3 g−1 with abundant active sites for absorption of polysulfides. Meanwhile, it maintains a fluffy 3D interconnected network structure with graphene-like sheets on its surface. The sulfur loading of the NS-UHPC reaches as high as 79.58 wt% after sulfur impregnation. In addition, the resulting NS-UHPC@S composite exhibits an initial specific capacity of 1255.17 mAh g−1 at 0.1C, and after 700 cycles, the capacity decay rate per cycle is 0.0323 %, demonstrating its excellent cycling stability. Therefore, the NS-UHPC is a desirable sulfur-loading host for high-performance LSB. © 2024 Elsevier Ltd

Keyword:

Electrode material Hierarchical porous carbon lithium‑sulfur batteries Nitrogen‑sulfur co-doping

Community:

  • [ 1 ] [Bi T.]College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350116, China
  • [ 2 ] [Zheng W.]College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350116, China
  • [ 3 ] [Zhou Y.]College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350116, China
  • [ 4 ] [Lin Q.]College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350116, China
  • [ 5 ] [Zhang X.]College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350116, China

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Source :

Journal of Energy Storage

ISSN: 2352-152X

Year: 2024

Volume: 93

8 . 9 0 0

JCR@2023

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ESI Highly Cited Papers on the List: 0 Unfold All

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Chinese Cited Count:

30 Days PV: 5

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