The Development and Experimental Analysis of Freestanding Single-Walled Carbon Nanotube/Sulfur Composite Cathode for the Next Generation of Sulfur-Based Batteries

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F25%3A00382164" target="_blank" >RIV/68407700:21220/25:00382164 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1002/ente.202500134" target="_blank" >https://doi.org/10.1002/ente.202500134</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/ente.202500134" target="_blank" >10.1002/ente.202500134</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The Development and Experimental Analysis of Freestanding Single-Walled Carbon Nanotube/Sulfur Composite Cathode for the Next Generation of Sulfur-Based Batteries

Popis výsledku v původním jazyce

This work uses a solution-based and scalable method to provide a freestanding single-walled carbon nanotube (SWCNT)/S cathode in both Li─S and Na─S batteries. SWCNTs with high conductivity and surface area can enhance the cathode flexibility. The incorporation of oxygen and sulfur bonds can enhance active redox sites for chemical adsorption. Sulfur and oxygen effectively hinder the shuttle effect by improving chemical interactions between the polysulfides and the nonpolar carbon framework, leading to improved cyclability of Na─S and Li─S cells. The cycling stability plots of Na─S and Li─S batteries with freestanding SWCNT/S as a cathode are investigated for 150 cycles at a high current density of 1000 mA g1. Both cells display a stable capacity behavior during cycling. The discharge capacity of the Li─S cell with the SWCNT/S cathode is retained at 978.2 mAh g1 while the Na─S cell only shows the capacity retention of 769.4 mAh g1 after 150 cycles. Coulombic efficiencies of ~94% and 90% are observed for Li─S and Na─S cells respectively. Therefore, the SWCNT/S cathode in both Li─S and Na─S batteries hinders the polysulfide shuttle, providing high electrolyte diffusion, resulting in improved active material reutilization and minimized capacity fading. Freestanding SWCNT/S cathode can enhance cycling stability over long-term cycling and is proved to be a promising cathode in both Li─S and Na─S batteries.

Název v anglickém jazyce

The Development and Experimental Analysis of Freestanding Single-Walled Carbon Nanotube/Sulfur Composite Cathode for the Next Generation of Sulfur-Based Batteries

Popis výsledku anglicky

This work uses a solution-based and scalable method to provide a freestanding single-walled carbon nanotube (SWCNT)/S cathode in both Li─S and Na─S batteries. SWCNTs with high conductivity and surface area can enhance the cathode flexibility. The incorporation of oxygen and sulfur bonds can enhance active redox sites for chemical adsorption. Sulfur and oxygen effectively hinder the shuttle effect by improving chemical interactions between the polysulfides and the nonpolar carbon framework, leading to improved cyclability of Na─S and Li─S cells. The cycling stability plots of Na─S and Li─S batteries with freestanding SWCNT/S as a cathode are investigated for 150 cycles at a high current density of 1000 mA g1. Both cells display a stable capacity behavior during cycling. The discharge capacity of the Li─S cell with the SWCNT/S cathode is retained at 978.2 mAh g1 while the Na─S cell only shows the capacity retention of 769.4 mAh g1 after 150 cycles. Coulombic efficiencies of ~94% and 90% are observed for Li─S and Na─S cells respectively. Therefore, the SWCNT/S cathode in both Li─S and Na─S batteries hinders the polysulfide shuttle, providing high electrolyte diffusion, resulting in improved active material reutilization and minimized capacity fading. Freestanding SWCNT/S cathode can enhance cycling stability over long-term cycling and is proved to be a promising cathode in both Li─S and Na─S batteries.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20301 - Mechanical engineering

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Energy Technology

ISSN

2194-4288

e-ISSN

2194-4296

Svazek periodika

13

Číslo periodika v rámci svazku

9

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

10

Strana od-do

—

Kód UT WoS článku

001446774400001

EID výsledku v databázi Scopus

2-s2.0-105000300068