Electrical and electrochemical properties of carbon nanotube-based free standing LTO electrodes for current collector-free Li-ion batteries

Prerna Chaturvedi, Amarsingh Bhabu Kanagaraj, Maryam Sultan Al Nahyan, H. Al Shibli, Amal Abdulla Ashoor, H. Fadaq, Sultan Al Dahmani, Daniel S. Choi

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

The spinel lithium titanate oxide (Li4Ti5O12, LTO) has been extensively studied as one of the most promising alternatives to carbon materials in energy conversion and storage devices, due to its high structural and thermal stability, rate capability, and excellent cycling stability. In this study, Li4Ti5O12/multi-walled carbon nanotubes (LTO-MWCNTs) free-standing and flexible composite electrodes/buckypapers were prepared via tape casting technique and well compared with commercially available LTO. The structural, morphological, electrical and electrochemical properties of LTO-MWCNTs buckypaper as well as LTO were studied. The electrical conductivity of LTO-based buckypaper was found to be very high i. e, 4.4 × 102 Scm−1 at room temperature. Further, the buckypaper prepared by synthesized LTO showed higher specific capacity (166 mAhg−1) compared to commercially available LTO (137 mAhg−1) at 0.2 C rate. The enhanced electrochemical performance of as-synthesized LTO-based buckypaper is mainly attributed to the higher electronic conductivity and homogeneous distribution of particles with its small size which facilitates large amount of active sites for lithium insertion and also short diffusion paths.

Original languageBritish English
Pages (from-to)1150-1155
Number of pages6
JournalCurrent Applied Physics
Volume19
Issue number11
DOIs
StatePublished - Nov 2019

Keywords

  • Carbon nanotubes
  • Free standing electrode
  • LiTiO
  • Tape casting

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