Novel design and synthesis of 1D bamboo-like CNTs@Sn4P3@C coaxial nanotubes for long-term sodium ion storage

作者：Zhang, Qianyu; Xu, Yuling; Qiu, Lifeng; Liu, Axue; Wang, Rui; Zhang, Longhai; Zhang, Chaofeng^*; Wang, Yan-Jie^*; Zhang, Jiujun^*

来源：Green Energy & Environment, 2022, 7(6): 1199-1205.

DOI：10.1016/j.gee.2021.01.013

• Bamboo-like coaxial nanotubes
• Sodium ion batteries
• Anode

In this work, a novel bamboo-like carbon nanotubes@Sn4P3@carbon (BLCNTs@Sn4P3@C) coaxial nanotubes are designed and prepared using a newly developed hydrothermal method followed by a phophidation process. The prepared Sn4P3 nanoparticles are uniformly coated and wrapped on the one-dimensional (1D) bamboo-like CNTs, which is covered by a uniform carbon layer to form a sandwich-like structure with Sn4P3 in between. The inner CNT and outer carbon can effectively maintain the structural stability and serve as the good electron conductors. Additionally, the outer carbon coating layer can effectively keep BLCNTs@Sn4P3@C nanotubes separate each other, preventing aggregation of Sn4P3 during charge/discharge when this material is used as anode for sodium ion batteries. The anode of BLCNTs@Sn4P3@C shows excellent reversible capacity and a long cycling of over 2000 cycles. The unique design of coaxial nanotubes is greatly beneficial to the electrochemical performance of Sn4P3 for sodium ion storage.(c) 2021 Institute of Process Engineering, Chinese Academy of Sciences. Publishing services by Elsevier B.V. on behalf of KeAi Communi-cations Co., Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

• 单位
  上海大学; 东莞理工学院; 四川大学