Publication detail

Synthesis and Characterization of Porous Sulfur/MWCNTs Composites with Improved Performance and Safety as Cathodes for Li-S Batterie

STRAKOVÁ FEDORKOVÁ, A. KAZDA, T. GAVALIEROVA, K. GÓMEZ-ROMERO, P. SHAMBEL, E.

Original Title

Synthesis and Characterization of Porous Sulfur/MWCNTs Composites with Improved Performance and Safety as Cathodes for Li-S Batterie

Type

journal article in Web of Science

Language

English

Original Abstract

Sulfur-carbon (S-C-MWCNTs) composites and sulfur-LiFePO4 (S-LFP-MWCNTs) composites were synthesised with MWCNTs additive by sulfur sublimation and solid state reaction. As prepared materials are characterized with scanning electron microscopy, thermogravimetry, FTIR, elemental analysis, XPS, cyclic voltammetry and galvanostatic charge/discharge tests. The composite S-LFP cathode with MWCNTs additive shows improved discharge capacity and performance. It shows an initial discharge capacity of 1167 mAh/g-sulfur, or 70% of theoretical capacity. The discharge capacity measured after 20 cycles for S-LFP-MWCNTs composite cathode was 80% of the initial capacity and remained stable. After 160 charge/discharge tests, the cathode displays a stable capacity of 561 mAh/g-sulfur at the C-rate of 0.2 C. Combination of sulfur, LiFePO4 and MWCNTs prevents aggregation and volume change of the cathode particles and improves the conductivity and electrochemical stability during the long-term cycling. 3-D FTIR spectroscopy measurements confirmed improved chemical stability and safety of sulfur composites also at higher temperatures.

Keywords

Sulfur composite cathode, Lithium batteries, LiFePO4, multi-wall carbon nanotubes

Authors

STRAKOVÁ FEDORKOVÁ, A.; KAZDA, T.; GAVALIEROVA, K.; GÓMEZ-ROMERO, P.; SHAMBEL, E.

Released

1. 1. 2018

Publisher

ESG

ISBN

1452-3981

Periodical

INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE

Year of study

13

Number

1

State

Republic of Serbia

Pages from

551

Pages to

562

Pages count

12

URL

http://www.electrochemsci.org/papers/vol13/130100551.pdf

Full text in the Digital Library

http://hdl.handle.net/11012/83840

BibTex

@article{BUT146926,
  author="Andrea {Straková Fedorková} and Tomáš {Kazda} and Katarina {Gavalierova} and Pedro {Gómez-Romero} and Elena {Shambel}",
  title="Synthesis and Characterization of Porous Sulfur/MWCNTs Composites with Improved Performance and Safety as Cathodes for Li-S Batterie",
  journal="INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE",
  year="2018",
  volume="13",
  number="1",
  pages="551--562",
  doi="10.20964/2018.01.67",
  issn="1452-3981",
  url="http://www.electrochemsci.org/papers/vol13/130100551.pdf"
}