Detail publikace

Synthesis and Characterization of Na2Ti6O13 and Na2Ti6O13/Na2Ti3O7 Sodium Titanates with Nanorod-like Structure as Negative Electrode Materials for Sodium-ion Batteries

ČECH, O. ČÁSTKOVÁ, K. CHLADIL, L. DOHNAL, P. ČUDEK, P. LIBICH, J. VANÝSEK, P.

Originální název

Synthesis and Characterization of Na2Ti6O13 and Na2Ti6O13/Na2Ti3O7 Sodium Titanates with Nanorod-like Structure as Negative Electrode Materials for Sodium-ion Batteries

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

In this work, we report microwave assisted hydrothermal synthesis of monoclinic sodium titanates with either tunnel or with mixed tunnel/layered structure. Single phase Na2Ti6O13 and mixed phase Na2Ti6O13/Na2Ti3O7 titanates were studied by electrochemical measurements with cyclic voltammetry, impedance spectroscopy and galvanostatic cycling. SEM images revealed that all the synthesized materials consist of rods with widths in the range of tenths to hundreds nanometers. XRD analysis was used for determination of the phase composition and crystallite size. It was shown that mixed phase electrode material reveals higher capacity and wider active voltage range but has also lower cycling stability. The insertion potential of layered titanate Na2Ti3O7 is much lower than in the case of Na2Ti6O9 and the specific capacity of mixed titanate in the first cycle is double the capacity of pure Na2Ti6O9. Although presence of layered titanate contributed to high specific capacity in early cycling, it allowed a considerable decrease in specific capacity at higher numbers of cycles.

Klíčová slova

Sodium-ion; Na2Ti6O13; Na2Ti3O7; anode; voltammetry; XRD; Randles-Sevcik

Autoři

ČECH, O.; ČÁSTKOVÁ, K.; CHLADIL, L.; DOHNAL, P.; ČUDEK, P.; LIBICH, J.; VANÝSEK, P.

Vydáno

10. 11. 2017

Nakladatel

Elsevier

ISSN

2352-152X

Periodikum

Journal of Energy Storage

Ročník

1

Číslo

1

Stát

Nizozemsko

Strany od

1

Strany do

8

Strany počet

8

URL

http://www.sciencedirect.com/science/article/pii/S2352152X17301329?via%3Dihub

BibTex

@article{BUT140025,
  author="Ondřej {Čech} and Klára {Částková} and Ladislav {Chladil} and Přemysl {Dohnal} and Pavel {Čudek} and Jiří {Libich} and Petr {Vanýsek}",
  title="Synthesis and Characterization of Na2Ti6O13 and Na2Ti6O13/Na2Ti3O7 Sodium Titanates with Nanorod-like Structure as Negative Electrode Materials for Sodium-ion Batteries",
  journal="Journal of Energy Storage",
  year="2017",
  volume="1",
  number="1",
  pages="1--8",
  doi="10.1016/j.est.2017.07.008",
  issn="2352-152X",
  url="http://www.sciencedirect.com/science/article/pii/S2352152X17301329?via%3Dihub"
}