Hierarchically nanorod structured Na2Ti6O13/Na2Ti3O7 nanocomposite as a superior anode for high-performance sodium ion battery

In this work, the nanorod structured Na2Ti6O13/Na2Ti3O7 nanocomposite anode is synthesized via facile solvothermal method for sodium ion battery application. The Lebail refinement analysis was performed to obtain the phase fractions ratio of Na2Ti6O13 and Na2Ti3O7 in the nanocomposite sample. It was...

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Bibliographic Details
Published in:Journal of electroanalytical chemistry (Lausanne, Switzerland) Switzerland), 2020-11, Vol.877, p.114747, Article 114747
Main Authors: Chandel, Sakshee, Lee, Seulgi, Lee, Seunggyeong, Kim, Sungjin, Singh, Satendra Pal, Kim, Jaekook, Rai, Alok Kumar
Format: Article
Language:English
Subjects:
Anode
Anodes
Morphology
Nanocomposites
Nanorod
Nanorods
Phases
Self-assembly
Sodium intercalation
Sodium ion batteries
Sodium titanate
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Summary:In this work, the nanorod structured Na2Ti6O13/Na2Ti3O7 nanocomposite anode is synthesized via facile solvothermal method for sodium ion battery application. The Lebail refinement analysis was performed to obtain the phase fractions ratio of Na2Ti6O13 and Na2Ti3O7 in the nanocomposite sample. It was found to be ~82% and ~ 18% for Na2Ti6O13 and Na2Ti3O7 phases, respectively. The microstructure analysis confirmed the nanorods morphology of the nanocomposite sample, which are self-assembled in hierarchal manner and exhibits the flower-like morphology at high magnifications. The obtained morphology demonstrates remarkable electrochemical performances such as superior cycling stability of 182 mAh g−1 at 100 mA g−1 after 165 cycles and high rate capability of 161 mAh g−1 at 500 mA g−1 over 100 cycles, which can be ascribed to the excellent synergetic effect between Na2Ti6O13 and Na2Ti3O7 phases that could effectively nullify the drawbacks of individual phases and thereby act as complementary to each other advantages. [Display omitted] •Na2Ti6O13/Na2Ti3O7 Nanocomposite is fabricated by solvothermal synthesis.•Lebail refinement performed to obtain phase fraction ratio in nanocomposite.•Microstructure analysis confirmed the hierarchically assembled nanorods morphology.•Excellent synergetic effect between Na2Ti6O13 and Na2Ti3O7 phases.•The resultant electrode exhibits superior Na+ ion storage performances.
ISSN:1572-6657
1873-2569
DOI:10.1016/j.jelechem.2020.114747