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Open AccessArticlePost Publication Peer ReviewVersion 2, Approved

Transport Properties of Nanostructured Li2TiO3 Anode Material Synthesized by Hydrothermal Method (Version 2, Approved)

1
Thin Films Laboratory, Department of Physics, Sri Venkateswara University, Tirupati-517502, India
2
Sorbonne Université, Campus Pierre et marie Curie, Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), CNRS UMR 7590, 4 place Jussieu, 75005 Paris, France
*
Author to whom correspondence should be addressed.
Received: 25 June 2019 / Accepted: 4 July 2019 / Published: 20 September 2019
Peer review status: 2nd round review Read review reports

Reviewer 1 Zeferino Gamiño-Arroyo University of Guanajuato Reviewer 2 Fabio Bottari University of Antwerp
Version 1
Original
Approved
Authors' response
Approved with revisions
Authors' response
Version 2
Approved
Approved
Version 2, Approved
Published: 20 September 2019
DOI: 10.3390/sci1030056
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Version 1, Original
Published: 10 July 2019
DOI: 10.3390/sci1020039
Download Full-text PDF
Li2TiO3 nanopowders were synthesized by hydrothermal process using anatase TiO2 and LiOHH2O as raw materials. Li2TiO3 crystallizes in the layered monoclinic structure (space group C2/c) with average crystallite size of 34 nm. Morphology, elemental composition and local structure of products were carried out using high-resolution transmission electron microscopy, field-emission scanning electron microscopy, Raman and Fourier transform infrared spectroscopy. Transport properties investigated by d.c. (4-probe measurements) and a.c. (complex impedance spectroscopy) show the activation energy of 0.71 and 0.65 eV, respectively. The ionic transport properties of Li+ ions in nanocrystalline Li2TiO3 characterized by cyclic voltammetry and impedance spectroscopy validate the good electrochemical properties of this anode material for lithium-ion batteries. View Full-Text
Keywords: hydrothermal reaction; nanoparticles; Li2TiO3; anode; ionic transport; lithium batteries hydrothermal reaction; nanoparticles; Li2TiO3; anode; ionic transport; lithium batteries
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MDPI and ACS Style

Lakshmi-Narayana, A.; Hussain, O.M.; Mauger, A.; Julien, C. Transport Properties of Nanostructured Li2TiO3 Anode Material Synthesized by Hydrothermal Method. Sci 2019, 1, 56.

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1

Reviewer 1

Sent on 24 Aug 2019 by Zeferino Gamiño-Arroyo | Approved
University of Guanajuato

The article presents a very interesting work on transport properties of nanostructured material Li2TiO3.  

There are many results of experiments and analysis and the results are presented correctly.

The quality of Figure 5, and Figure 7 must be improved to clarify the results.

 

 

Response to Reviewer 1

Sent on 11 Jul 2020 by Ambadi Lakshmi-Narayana, Obili M. Hussain, Alain Mauger, Christian M. Julien

We wish to thank the referee for their helpful comments. For clarity, the referee reports have been copied hereunder, and the answer to the comments has been inserted in red characters. All the corrections have been reported in red in the updated version. The quality of Figure 5, and Figure 7 must be improved to clarify the results. Thank you for this comments . Figs. 5 and 7 have been modified for quality improvement

Reviewer 2

Sent on 06 Sep 2019 by Fabio Bottari | Approved with revisions
University of Antwerp

The paper reports the synthesis of  Li2TiO3 nano powders for anode material in lithium-ion batteries and their morphological and electrochemical characterization. The experimental work is well-articulated and presented and the manuscript needs only minor adjustments. Below some detailed comments:

Abstract: Try to avoid acronym and abbreviations as much as possible.

3.2 Surface Morphology: The FESEM characterization was done with material calcinated at 800° C for 6 h, while in materials and method the calcination time is 2h. Can you explain this difference?

3.3 Electrical Transport: The resolution of Fig. 5 is very low. You also stated that two semicircles can be observed in the Nyquist plot for higher temperature (>400° C) but with the current graph is not really clear. You could separate Fig5 A from the rest and make the magnification in the inset more clear.

In Fig.5(a) how do you explain the trend of the last 3 points of each Nyquist plot?

Please report the equivalent circuit used to fit the data.

Response to Reviewer 2

Sent on 11 Jul 2020 by Ambadi Lakshmi-Narayana, Obili M. Hussain, Alain Mauger, Christian M. Julien

We wish to thank the referee for their helpful comments. For clarity, the referee reports have been copied hereunder, and the answer to the comments has been inserted in red characters. All the corrections have been reported in red in the updated version. The paper reports the synthesis of Li2TiO3 nano powders for anode material in lithium-ion batteries and their morphological and electrochemical characterization. The experimental work is well-articulated and presented and the manuscript needs only minor adjustments. Below some detailed comments: Abstract: Try to avoid acronym and abbreviations as much as possible. Thank you for this comment. All acronyms have been deleted in the abstract. 3.2 Surface Morphology: The FESEM characterization was done with material calcinated at 800° C for 6 h, while in materials and method the calcination time is 2h. Can you explain this difference? Reply. Thank you for this comment. We have corrected this typo error. 3.3 Electrical Transport: The resolution of Fig. 5 is very low. You also stated that two semicircles can be observed in the Nyquist plot for higher temperature (>400° C) but with the current graph is not really clear. You could separate Fig5 A from the rest and make the magnification in the inset more clear. Reply. Thank you for this comment. We have modified the Fig. 5a and deleted the inset by two impedance plots in the temperature range 320-420 and 420-500 °C. In Fig.5(a) how do you explain the trend of the last 3 points of each Nyquist plot? Reply. Thank you for this comment. We have repeated these experiments. In fact, it was an experimental artefact occurring at low frequency that could be due to the connection defect. Please report the equivalent circuit used to fit the data. Reply. Thank you for this comment. We have added the equivalent circuit as inset in Figs. 5a and 5b.

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