SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2021, Vol. 39 ›› Issue (11): 240-246.DOI: 10.1016/j.cjche.2021.04.013

• Energy Science and Technology • 上一篇    下一篇

Self-assembled MoS2/C nanoflowers with expanded interlayer spacing as a high-performance anode for sodium ion batteries

Yuxiang Luo1, Pei Zhang1, Xunhui Xiong1, Haikuo Fu2   

  1. 1 Guangzhou Key Laboratory of Surface Chemistry of Energy Materials, New Energy Research Institute, School of Environment and Energy, South China University of Technology, Guangzhou 510006, China;
    2 Qingyuan Jiazhi New Material Research Institute Co. Ltd., Qingyuan 511500, China
  • 收稿日期:2021-03-01 修回日期:2021-03-31 出版日期:2021-11-28 发布日期:2021-12-27
  • 通讯作者: Xunhui Xiong
  • 基金资助:
    We gratefully acknowledge the financial support from National Natural Science Foundation of China (51874142), Pearl River S&T Nova Program of Guangzhou (201806010031), the Fundamental Research Funds for the Central Universities (2019JQ09), Guangdong Innovative and Entrepreneurial Research Team Program (2016ZT06N569), Tip-top Scientific and Technical Innovative Youth Talents of Guangdong Special Support Program (2019TQ05L903) and Young Elite Scientists Sponsorship Program by CAST (2019QNRC001).

Self-assembled MoS2/C nanoflowers with expanded interlayer spacing as a high-performance anode for sodium ion batteries

Yuxiang Luo1, Pei Zhang1, Xunhui Xiong1, Haikuo Fu2   

  1. 1 Guangzhou Key Laboratory of Surface Chemistry of Energy Materials, New Energy Research Institute, School of Environment and Energy, South China University of Technology, Guangzhou 510006, China;
    2 Qingyuan Jiazhi New Material Research Institute Co. Ltd., Qingyuan 511500, China
  • Received:2021-03-01 Revised:2021-03-31 Online:2021-11-28 Published:2021-12-27
  • Contact: Xunhui Xiong
  • Supported by:
    We gratefully acknowledge the financial support from National Natural Science Foundation of China (51874142), Pearl River S&T Nova Program of Guangzhou (201806010031), the Fundamental Research Funds for the Central Universities (2019JQ09), Guangdong Innovative and Entrepreneurial Research Team Program (2016ZT06N569), Tip-top Scientific and Technical Innovative Youth Talents of Guangdong Special Support Program (2019TQ05L903) and Young Elite Scientists Sponsorship Program by CAST (2019QNRC001).

摘要: Two-dimensional (2D) MoS2 nanomaterials have been extensively studied due to their special structure and high theoretical capacity, but it is still a huge challenge to improve its cycle stability and achieve superior fast charge and discharge performance. Herein, a facile one-step hydrothermal method is proposed to synthetize an ordered and self-assembled MoS2 nanoflower (MoS2/C NF) with expanded interlayer spacing via embedding a carbon layer into the interlayer. The carbon layer in the MoS2 interlayer can speed the transfer of electrons, while the nanoflower structure promotes the ions transport and improves the structural stability during the charging/discharging process. Therefore, MoS2/C NF electrode exhibits exceptional rate performance (318.2 and 302.3 mA·h·g-1 at 5.0 and 10.0 A·g-1, respectively) and extraordinary cycle durability (98.8% retention after 300 cycles at a current density of 1.0 A·g-1). This work provides a simple and feasible method for constructing high-performance anode composites for sodium ion batteries with excellent cycle durability and fast charge/discharge ability.

关键词: Sodium ion batteries, Nanoflower structure, Expanded interlayer spacing, MoS2 nanosheets

Abstract: Two-dimensional (2D) MoS2 nanomaterials have been extensively studied due to their special structure and high theoretical capacity, but it is still a huge challenge to improve its cycle stability and achieve superior fast charge and discharge performance. Herein, a facile one-step hydrothermal method is proposed to synthetize an ordered and self-assembled MoS2 nanoflower (MoS2/C NF) with expanded interlayer spacing via embedding a carbon layer into the interlayer. The carbon layer in the MoS2 interlayer can speed the transfer of electrons, while the nanoflower structure promotes the ions transport and improves the structural stability during the charging/discharging process. Therefore, MoS2/C NF electrode exhibits exceptional rate performance (318.2 and 302.3 mA·h·g-1 at 5.0 and 10.0 A·g-1, respectively) and extraordinary cycle durability (98.8% retention after 300 cycles at a current density of 1.0 A·g-1). This work provides a simple and feasible method for constructing high-performance anode composites for sodium ion batteries with excellent cycle durability and fast charge/discharge ability.

Key words: Sodium ion batteries, Nanoflower structure, Expanded interlayer spacing, MoS2 nanosheets