能源化学(英文版) ›› 2020, Vol. 48 ›› Issue (9): 364-374.DOI: 10.1016/j.jechem.2020.02.030

• • 上一篇    下一篇

Attapulgite nanorods assisted surface engineering for separator to achieve high-performance lithium-sulfur batteries

Wenhao Suna, Xiaogang Suna, Naseem Akhtara, chengming Lia, Weikun Wangb, Anbang Wangb, Kai Wangc, Yaqin Huanga   

  1. a Beijing Key Laboratory of Electrochemical Process and Technology for Materials.Key Laboratory of Biomedical Materials of Natural Macromolecules.Ministry of Education.Beijing University of Chemical Technology.Beijing 100029.China;
    b Research Institute of Chemical Defense.Beijing 100191.China;
    c Institute of Electrical Engineering.Chinese Academy of Sciences.Beijing 100190.China
  • 收稿日期:2020-01-19 修回日期:2020-02-18 出版日期:2020-09-15 发布日期:2020-12-18
  • 通讯作者: Kai Wang, Yaqin Huang
  • 基金资助:
    This work was supported by the National Natural Science Foundation of China (Nos.51861165101,51822706,51777200),Beijing Natural Science Foundation (No.JQ19012) and DNL Cooperation Fund,CAS (DNL201912).

Attapulgite nanorods assisted surface engineering for separator to achieve high-performance lithium-sulfur batteries

Wenhao Suna, Xiaogang Suna, Naseem Akhtara, chengming Lia, Weikun Wangb, Anbang Wangb, Kai Wangc, Yaqin Huanga   

  1. a Beijing Key Laboratory of Electrochemical Process and Technology for Materials.Key Laboratory of Biomedical Materials of Natural Macromolecules.Ministry of Education.Beijing University of Chemical Technology.Beijing 100029.China;
    b Research Institute of Chemical Defense.Beijing 100191.China;
    c Institute of Electrical Engineering.Chinese Academy of Sciences.Beijing 100190.China
  • Received:2020-01-19 Revised:2020-02-18 Online:2020-09-15 Published:2020-12-18
  • Contact: Kai Wang, Yaqin Huang
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (Nos.51861165101,51822706,51777200),Beijing Natural Science Foundation (No.JQ19012) and DNL Cooperation Fund,CAS (DNL201912).

摘要: Lithium-sulfur (Li-S) batteries have been recognized as one of the most promising candidates for nextgeneration portable electronic devices.owing to their extremely high energy density and low cost.However.the dissolution of lithium polysulfides (LiPSs) and consequent "shuttle effect" seriously hinder the practical deployment of Li-S batteries.Herein.multi-metal oxide nanorods named attapulgite are proposed as multifunctional ionic sieve to immobilize LiPSs and further promote the regulation of LiPSs.Attapulgite.consisting of Al.Mg.Fe.Si and O ions.possesses more polar sites to immobilize LiPSs in comparison with single metal oxides.In addition.the catalytic nature (Fe ions) of attapulgite avails the LiPSs conversion reaction.which is further confirmed by the linear sweep voltammetry and electrochemical impedance spectroscopy.Benefited from the synergistic effect of multi-metal oxide and conductive carbon.the Li-S battery with the modified separator delivers remarkable discharge capacities of 1059.4 mAh g-1 and 792.5 mAh g-1 for the first and 200th cycle at 0.5 C.respectively.The work presents an effective way to improve the electrochemical performance of Li-S batteries by employing attapulgite nanorods assisted separator surface engineering.

关键词: Surface engineering, Multi-metal oxide, Separator, Shuttle effect, Synergistic effect

Abstract: Lithium-sulfur (Li-S) batteries have been recognized as one of the most promising candidates for nextgeneration portable electronic devices.owing to their extremely high energy density and low cost.However.the dissolution of lithium polysulfides (LiPSs) and consequent "shuttle effect" seriously hinder the practical deployment of Li-S batteries.Herein.multi-metal oxide nanorods named attapulgite are proposed as multifunctional ionic sieve to immobilize LiPSs and further promote the regulation of LiPSs.Attapulgite.consisting of Al.Mg.Fe.Si and O ions.possesses more polar sites to immobilize LiPSs in comparison with single metal oxides.In addition.the catalytic nature (Fe ions) of attapulgite avails the LiPSs conversion reaction.which is further confirmed by the linear sweep voltammetry and electrochemical impedance spectroscopy.Benefited from the synergistic effect of multi-metal oxide and conductive carbon.the Li-S battery with the modified separator delivers remarkable discharge capacities of 1059.4 mAh g-1 and 792.5 mAh g-1 for the first and 200th cycle at 0.5 C.respectively.The work presents an effective way to improve the electrochemical performance of Li-S batteries by employing attapulgite nanorods assisted separator surface engineering.

Key words: Surface engineering, Multi-metal oxide, Separator, Shuttle effect, Synergistic effect