Three-Dimensional Porous TiNb2O7/CNT-KB Composite Microspheres as Lithium-Ion Battery Anode Material

Min Liu, Houcai Dong, Shuo Zhang, Xi Chen, Yiping Sun, Shan Gao, Jiaqiang Xu, Xiaodong Wu, Anbao Yuan*, Wei Lu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)

Abstract

Nano-TiNb2O7/multiwalled carbon nanotube and ketjen black (TiNb2O7/CNT-KB) composite microspheres with porous three-dimensional (3D) hierarchical heterostructure are fabricated by spray drying and solvothermal method. This composite material exhibits a high reversible charge specific capacity of 327.8 mAh g−1 at the current rate of 0.1 C and 151.1 mAh g−1 at 20 C rate. When it is cycled at a high current rate of 5 C for 1000 cycles, the charge capacity is dropped from the maximum value of 220.8 mAh g−1 (6th cycle) to the end value of 145.4 mAh g−1, with capacity retention of 65.9 %. The TiNb2O7/CNT-KB composite material demonstrates much superior electrochemical performance over the bare TiNb2O7 material, and this result should be attributed to its particular porous 3D hierarchical structure, which possesses enhanced electrical conductivity as well as the ability for accommodating volume change and preventing particle aggregation of the electrode active material during the discharge and charge cycles.

Original languageEnglish
Pages (from-to)3959-3965
Number of pages7
JournalChemElectroChem
Volume6
Issue number15
DOIs
Publication statusPublished - Aug 2019

Keywords

  • Carbon nanotube
  • Ketjen black
  • Lithium ion battery
  • Solvothermal reaction
  • Titanium niobium oxide anode

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