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

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26220%2F18%3APU127610" target="_blank" >RIV/00216305:26220/18:PU127610 - isvavai.cz</a>

Result on the web

<a href="http://www.electrochemsci.org/papers/vol13/130100551.pdf" target="_blank" >http://www.electrochemsci.org/papers/vol13/130100551.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.20964/2018.01.67" target="_blank" >10.20964/2018.01.67</a>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20501 - Materials engineering

Project

—

Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE

ISSN

1452-3981

e-ISSN

—

Volume of the periodical

13

Issue of the periodical within the volume

1

Country of publishing house

RS - THE REPUBLIC OF SERBIA

Number of pages

12

Pages from-to

551-562

UT code for WoS article

000428965800045

EID of the result in the Scopus database

2-s2.0-85040115094