Nanocrystalline TiO2/Carbon/Sulfur Composite Cathodes for Lithium-Sulfur Battery

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F21%3A00541425" target="_blank" >RIV/61388955:_____/21:00541425 - isvavai.cz</a>

Result on the web

<a href="http://hdl.handle.net/11104/0318985" target="_blank" >http://hdl.handle.net/11104/0318985</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/nano11020541" target="_blank" >10.3390/nano11020541</a>

Result language

angličtina

Original language name

Nanocrystalline TiO2/Carbon/Sulfur Composite Cathodes for Lithium-Sulfur Battery

Original language description

This paper evaluates the influence of the morphology, surface area, and surface modification of carbonaceous additives on the performance of the corresponding cathode in a lithium-sulfur battery. The structure of sulfur composite cathodes with mesoporous carbon, activated carbon, and electrochemical carbon is studied by X-ray diffraction, nitrogen adsorption measurements, and Raman spectroscopy. The sulfur cathode containing electrochemical carbon with the specific surface area of 1606.6 m(2) g(-1) exhibits the best electrochemical performance and provides a charge capacity of almost 650 mAh g(-1) in cyclic voltammetry at a 0.1 mV s(-1) scan rate and up to 1300 mAh g(-1) in galvanostatic chronopotentiometry at a 0.1 C rate. This excellent electrochemical behavior is ascribed to the high dispersity of electrochemical carbon, enabling a perfect encapsulation of sulfur. The surface modification of carbonaceous additives by TiO2 has a positive effect on the electrochemical performance of sulfur composites with mesoporous and activated carbons, but it causes a loss of dispersity and a consequent decrease of the charge capacity of the sulfur composite with electrochemical carbon. The composite of sulfur with TiO2-modified activated carbon exhibited the charge capacity of 393 mAh g(-1) in cyclic voltammetry and up to 493 mAh g(-1) in galvanostatic chronopotentiometry. The presence of an additional Sigracell carbon felt interlayer further improves the electrochemical performance of cells with activated carbon, electrochemical carbon, and nanocrystalline TiO2-modified activated carbon. This positive effect is most pronounced in the case of activated carbon modified by nanocrystalline TiO2. However, it is not boosted by additional coverage by TiO2 or SnO2, which is probably due to the blocking of pores.

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

—

OECD FORD branch

10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Project

<a href="/en/project/GA20-03564S" target="_blank" >GA20-03564S: New host materials and structures for advanced lithium-sulfur batteries</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2021

Confidentiality

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

Name of the periodical

Nanomaterials

ISSN

2079-4991

e-ISSN

2079-4991

Volume of the periodical

11

Issue of the periodical within the volume

2

Country of publishing house

CH - SWITZERLAND

Number of pages

13

Pages from-to

541

UT code for WoS article

000622878400001

EID of the result in the Scopus database

2-s2.0-85100944343