能源化学(英文版) ›› 2019, Vol. 38 ›› Issue (11): 185-191.DOI: 10.1016/j.jechem.2019.03.036

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Na2V6O16·2.14H2O nanobelts as a stable cathode for aqueous zinc-ion batteries with long-term cycling performance

Fang Hua, Di Xiea, Depeng Zhaoa, Guihong Songa, Kai Zhub   

  1. a School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, Liaoning, China;
    b Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150010, Heilongjiang, China
  • 收稿日期:2019-01-22 修回日期:2019-03-27 出版日期:2019-11-15 发布日期:2020-12-18
  • 通讯作者: Fang Hu, hufang25@sut.edu.cn; Kai Zhu, kzhu@hrbeu.edu.cn
  • 基金资助:
    This work was supported by the National Key R&D Program of China (Grant no. 2018YFB1502005), the National Natural Science Foundation of China (Grant nos. 51476163, 51806209 and 81801768) and Institute of Electrical Engineering, Chinese Academy of Sciences (No.Y770111CSC).

Na2V6O16·2.14H2O nanobelts as a stable cathode for aqueous zinc-ion batteries with long-term cycling performance

Fang Hua, Di Xiea, Depeng Zhaoa, Guihong Songa, Kai Zhub   

  1. a School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, Liaoning, China;
    b Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150010, Heilongjiang, China
  • Received:2019-01-22 Revised:2019-03-27 Online:2019-11-15 Published:2020-12-18
  • Contact: Fang Hu, hufang25@sut.edu.cn; Kai Zhu, kzhu@hrbeu.edu.cn
  • Supported by:
    This work was supported by the National Key R&D Program of China (Grant no. 2018YFB1502005), the National Natural Science Foundation of China (Grant nos. 51476163, 51806209 and 81801768) and Institute of Electrical Engineering, Chinese Academy of Sciences (No.Y770111CSC).

摘要: Aqueous zinc-ion batteries (ZIBs) have been considered as one of the most promising electrochemical devices for large-scale energy storage system owing to their low cost and high safety. Herein, Na2V6O16·2.14H2O nanobelts are synthesized and applied as cathode material for ZIBs. The sample displays a high capacity of 466 mAh g-1 at 100 mA g-1 and stable cycling performance with a capacity retention of 90% over 2000 cycles at the 20 A g-1. Moreover, Na2V6O16·2.14H2O presents a capable rate ability and a high energy density of 312 Wh kg-1 at a specific power of 70 W kg-1. The superior electrochemical performance is attributed to the large interlayer spacing and outstanding structure stability, which promise the highly reversible intercalation and extraction of zinc ion. The electrochemical kinetics and zinc ion storage mechanism are also investigated. This work demonstrates that nanoscale electrode materials with large interlayer spacing can effectively enhance the electrochemical performance of aqueous ZIBs, which can be extended to other metal ion batteries, such as magnesium ion batteries and aluminum ion batteries.

关键词: Aqueous zinc-ion batteries, Nanobelts, Sodium vanadates, Electrochemical performance

Abstract: Aqueous zinc-ion batteries (ZIBs) have been considered as one of the most promising electrochemical devices for large-scale energy storage system owing to their low cost and high safety. Herein, Na2V6O16·2.14H2O nanobelts are synthesized and applied as cathode material for ZIBs. The sample displays a high capacity of 466 mAh g-1 at 100 mA g-1 and stable cycling performance with a capacity retention of 90% over 2000 cycles at the 20 A g-1. Moreover, Na2V6O16·2.14H2O presents a capable rate ability and a high energy density of 312 Wh kg-1 at a specific power of 70 W kg-1. The superior electrochemical performance is attributed to the large interlayer spacing and outstanding structure stability, which promise the highly reversible intercalation and extraction of zinc ion. The electrochemical kinetics and zinc ion storage mechanism are also investigated. This work demonstrates that nanoscale electrode materials with large interlayer spacing can effectively enhance the electrochemical performance of aqueous ZIBs, which can be extended to other metal ion batteries, such as magnesium ion batteries and aluminum ion batteries.

Key words: Aqueous zinc-ion batteries, Nanobelts, Sodium vanadates, Electrochemical performance