Hollow nitrogen-doped carbon/sulfur@MnO2 nanocomposite with structural and chemical dual-encapsulation for lithium-sulfur battery

Hao Chen, Wen Da Dong, Fan Jie Xia, Yun Jing Zhang, Min Yan, Jian Ping Song, Wei Zou, Yang Liu, Zhi Yi Hu, Jing Liu, Yu Li, Hong En Wang, Li Hua Chen, Bao Lian Su

Research output: Contribution to journalArticle

Abstract

Although lithium-sulfur (Li-S) batteries are one of the most promising energy storage systems, the low electrical conductivity of sulfur, the serious shuttle of the dissolved lithium polysulfides (LiPSs) and the large volume change during cycling greatly hinder the practical application of Li-S batteries. To overcome these issues, we report the in situ growing MnO2 nanosheets on the hollow nitrogen-doped micropore-rich carbon (NMRC) to form NMRC/S@MnO2 nanocomposite with high sulfur content for advanced Li-S battery. The hollow nonpolar micropore-rich carbon nanospheres not only provide effectively structural confinement for active species but also accommodate the volume change during the charge–discharge process. The polar MnO2 nanosheets and doped nitrogen present strong chemisorption for LiPSs. Consequently, the synergistic dual-encapsulation from structural confinement and chemisorption makes the NMRC/S@MnO2 nanocomposite has a theoretical sulfur loading of 72% and exhibit a high initial specific capacity of 1144 mAh·g−1 and a reversible capacity of 1023 mAh·g−1 after 200 cycles at 0.2 C. Even after 1000 cycles at 2.0 C, a capacity of 590 mAh·g−1 is maintained, among the best results for Li-S batteries. Our work reveals that the carefully design of sulfur-based composites with structural and chemical dual-encapsulation is promising to push forward the practical implementation of Li-S batteries.

Original languageEnglish
Article number122746
JournalChemical Engineering Journal
Volume381
DOIs
Publication statusPublished - 1 Feb 2020

Fingerprint

encapsulation
lithium
Encapsulation
Sulfur
Nanocomposites
Nitrogen
Carbon
sulfur
nitrogen
carbon
Polysulfides
Nanosheets
Chemisorption
Lithium
volume change
Nanospheres
Energy storage
Lithium sulfur batteries
chemical
battery

Keywords

  • Dual-encapsulation
  • In situ growth
  • Li-S batteries
  • Micropore-rich hollow carbon
  • MnO nanosheets

Cite this

Chen, Hao ; Dong, Wen Da ; Xia, Fan Jie ; Zhang, Yun Jing ; Yan, Min ; Song, Jian Ping ; Zou, Wei ; Liu, Yang ; Hu, Zhi Yi ; Liu, Jing ; Li, Yu ; Wang, Hong En ; Chen, Li Hua ; Su, Bao Lian. / Hollow nitrogen-doped carbon/sulfur@MnO2 nanocomposite with structural and chemical dual-encapsulation for lithium-sulfur battery. In: Chemical Engineering Journal. 2020 ; Vol. 381.
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title = "Hollow nitrogen-doped carbon/sulfur@MnO2 nanocomposite with structural and chemical dual-encapsulation for lithium-sulfur battery",
abstract = "Although lithium-sulfur (Li-S) batteries are one of the most promising energy storage systems, the low electrical conductivity of sulfur, the serious shuttle of the dissolved lithium polysulfides (LiPSs) and the large volume change during cycling greatly hinder the practical application of Li-S batteries. To overcome these issues, we report the in situ growing MnO2 nanosheets on the hollow nitrogen-doped micropore-rich carbon (NMRC) to form NMRC/S@MnO2 nanocomposite with high sulfur content for advanced Li-S battery. The hollow nonpolar micropore-rich carbon nanospheres not only provide effectively structural confinement for active species but also accommodate the volume change during the charge–discharge process. The polar MnO2 nanosheets and doped nitrogen present strong chemisorption for LiPSs. Consequently, the synergistic dual-encapsulation from structural confinement and chemisorption makes the NMRC/S@MnO2 nanocomposite has a theoretical sulfur loading of 72{\%} and exhibit a high initial specific capacity of 1144 mAh·g−1 and a reversible capacity of 1023 mAh·g−1 after 200 cycles at 0.2 C. Even after 1000 cycles at 2.0 C, a capacity of 590 mAh·g−1 is maintained, among the best results for Li-S batteries. Our work reveals that the carefully design of sulfur-based composites with structural and chemical dual-encapsulation is promising to push forward the practical implementation of Li-S batteries.",
keywords = "Dual-encapsulation, In situ growth, Li-S batteries, Micropore-rich hollow carbon, MnO nanosheets",
author = "Hao Chen and Dong, {Wen Da} and Xia, {Fan Jie} and Zhang, {Yun Jing} and Min Yan and Song, {Jian Ping} and Wei Zou and Yang Liu and Hu, {Zhi Yi} and Jing Liu and Yu Li and Wang, {Hong En} and Chen, {Li Hua} and Su, {Bao Lian}",
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Hollow nitrogen-doped carbon/sulfur@MnO2 nanocomposite with structural and chemical dual-encapsulation for lithium-sulfur battery. / Chen, Hao; Dong, Wen Da; Xia, Fan Jie; Zhang, Yun Jing; Yan, Min; Song, Jian Ping; Zou, Wei; Liu, Yang; Hu, Zhi Yi; Liu, Jing; Li, Yu; Wang, Hong En; Chen, Li Hua; Su, Bao Lian.

In: Chemical Engineering Journal, Vol. 381, 122746, 01.02.2020.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Hollow nitrogen-doped carbon/sulfur@MnO2 nanocomposite with structural and chemical dual-encapsulation for lithium-sulfur battery

AU - Chen, Hao

AU - Dong, Wen Da

AU - Xia, Fan Jie

AU - Zhang, Yun Jing

AU - Yan, Min

AU - Song, Jian Ping

AU - Zou, Wei

AU - Liu, Yang

AU - Hu, Zhi Yi

AU - Liu, Jing

AU - Li, Yu

AU - Wang, Hong En

AU - Chen, Li Hua

AU - Su, Bao Lian

PY - 2020/2/1

Y1 - 2020/2/1

N2 - Although lithium-sulfur (Li-S) batteries are one of the most promising energy storage systems, the low electrical conductivity of sulfur, the serious shuttle of the dissolved lithium polysulfides (LiPSs) and the large volume change during cycling greatly hinder the practical application of Li-S batteries. To overcome these issues, we report the in situ growing MnO2 nanosheets on the hollow nitrogen-doped micropore-rich carbon (NMRC) to form NMRC/S@MnO2 nanocomposite with high sulfur content for advanced Li-S battery. The hollow nonpolar micropore-rich carbon nanospheres not only provide effectively structural confinement for active species but also accommodate the volume change during the charge–discharge process. The polar MnO2 nanosheets and doped nitrogen present strong chemisorption for LiPSs. Consequently, the synergistic dual-encapsulation from structural confinement and chemisorption makes the NMRC/S@MnO2 nanocomposite has a theoretical sulfur loading of 72% and exhibit a high initial specific capacity of 1144 mAh·g−1 and a reversible capacity of 1023 mAh·g−1 after 200 cycles at 0.2 C. Even after 1000 cycles at 2.0 C, a capacity of 590 mAh·g−1 is maintained, among the best results for Li-S batteries. Our work reveals that the carefully design of sulfur-based composites with structural and chemical dual-encapsulation is promising to push forward the practical implementation of Li-S batteries.

AB - Although lithium-sulfur (Li-S) batteries are one of the most promising energy storage systems, the low electrical conductivity of sulfur, the serious shuttle of the dissolved lithium polysulfides (LiPSs) and the large volume change during cycling greatly hinder the practical application of Li-S batteries. To overcome these issues, we report the in situ growing MnO2 nanosheets on the hollow nitrogen-doped micropore-rich carbon (NMRC) to form NMRC/S@MnO2 nanocomposite with high sulfur content for advanced Li-S battery. The hollow nonpolar micropore-rich carbon nanospheres not only provide effectively structural confinement for active species but also accommodate the volume change during the charge–discharge process. The polar MnO2 nanosheets and doped nitrogen present strong chemisorption for LiPSs. Consequently, the synergistic dual-encapsulation from structural confinement and chemisorption makes the NMRC/S@MnO2 nanocomposite has a theoretical sulfur loading of 72% and exhibit a high initial specific capacity of 1144 mAh·g−1 and a reversible capacity of 1023 mAh·g−1 after 200 cycles at 0.2 C. Even after 1000 cycles at 2.0 C, a capacity of 590 mAh·g−1 is maintained, among the best results for Li-S batteries. Our work reveals that the carefully design of sulfur-based composites with structural and chemical dual-encapsulation is promising to push forward the practical implementation of Li-S batteries.

KW - Dual-encapsulation

KW - In situ growth

KW - Li-S batteries

KW - Micropore-rich hollow carbon

KW - MnO nanosheets

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DO - 10.1016/j.cej.2019.122746

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