摘要
In this work,a novel bamboo-like carbon nanotubes@Sn4P3@carbon(BLCNTs@Sn_(4)P_(3)@C)coaxial nanotubes are designed and prepared using a newly developed hydrothermal method followed by a phophidation process.The prepared Sn_(4)P_(3) 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 Sn_(4)P_(3) 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@Sn_(4)P_(3)@C nanotubes separate each other,preventing aggregation of Sn_(4)P_(3) during charge/discharge when this material is used as anode for sodium ion batteries.The anode of BLCNTs@Sn_(4)P_(3)@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 Sn_(4)P_(3) for sodium ion storage.
基金
supported by National Natural Science Foundation of China(51772051,51872071)
Natural Science Foundation of Guangdong Province(2016A030310127)
Support Funding for Innovation Projects for Overseas Students in Anhui Province(2020LCX031)
supported by the Foundation of High-level Talents(GB200902-30,No.196100041018)
the Foundation of Regular Research Team(TDYB2019007,No.196100043028)
the Foundation of Doctor'sWorkstation of MCNAIR NEW POWER CO.,LTD(GC200104-40,No.186100030017)at Dongguan University of Technology.
