Hierarchical Co/CoSe@MoSe2 heterostructures enable efficient polysulfides trapping and conversion for highly stable lithium-sulfur batteries

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28610%2F25%3A63595859" target="_blank" >RIV/70883521:28610/25:63595859 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S2352152X25016792?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2352152X25016792?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.est.2025.116966" target="_blank" >10.1016/j.est.2025.116966</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Hierarchical Co/CoSe@MoSe2 heterostructures enable efficient polysulfides trapping and conversion for highly stable lithium-sulfur batteries

Popis výsledku v původním jazyce

Lithium-sulfur batteries (LSBs) are now facing great challenges in the sluggish reaction kinetics and the severe shuttle effect of polysulfides. To address these issues, it is of crucial importance to design efficient sulfur cathode with strong adsorption, high catalytic activity and high electrical conductivity. Herein, Co/CoSe@MoSe2 hierarchically heterostructured catalyst is synthesized via a facile pyrolysis and hydrothermal method, in which MoSe₂ nanosheets are coated on Co/CoSe hollow microspheres. As-prepared structure serves as a sulfur host for lithium-sulfur batteries (LSBs). Metal–organic framework (MOF)-derived Co/CoSe metallic junction facilitates rapid catalytic conversion of lithium polysulfide (LiPSs), while two-dimensional MoSe2 nanosheets possessing a strong polarity and high specific surface area effectively trap LiPSs and suppress the shuttle effect. Last but not least, porous carbon networks derived by MOFs accelerate the charge transfer within the catalyst. With these synergistic advantages from their heterogeneous components, the assembled LSBs based on Co/CoSe@MoSe2 sulfur cathode delivers a high discharge capacity of 1313.9 mA h g−1 at 0.1C with a sulfur loading of 1.5 mg cm−2. Even at a high sulfur loading of 3.0 mg cm−2, it still demonstrates a stable cycling with a low capacity decay of 0.042 % per cycle after 200 cycles at 0.2C. This work provides new insights into understanding of heterostructured catalyst systems with balancing adsorption and catalysis for high-performance LSBs.

Název v anglickém jazyce

Hierarchical Co/CoSe@MoSe2 heterostructures enable efficient polysulfides trapping and conversion for highly stable lithium-sulfur batteries

Popis výsledku anglicky

Lithium-sulfur batteries (LSBs) are now facing great challenges in the sluggish reaction kinetics and the severe shuttle effect of polysulfides. To address these issues, it is of crucial importance to design efficient sulfur cathode with strong adsorption, high catalytic activity and high electrical conductivity. Herein, Co/CoSe@MoSe2 hierarchically heterostructured catalyst is synthesized via a facile pyrolysis and hydrothermal method, in which MoSe₂ nanosheets are coated on Co/CoSe hollow microspheres. As-prepared structure serves as a sulfur host for lithium-sulfur batteries (LSBs). Metal–organic framework (MOF)-derived Co/CoSe metallic junction facilitates rapid catalytic conversion of lithium polysulfide (LiPSs), while two-dimensional MoSe2 nanosheets possessing a strong polarity and high specific surface area effectively trap LiPSs and suppress the shuttle effect. Last but not least, porous carbon networks derived by MOFs accelerate the charge transfer within the catalyst. With these synergistic advantages from their heterogeneous components, the assembled LSBs based on Co/CoSe@MoSe2 sulfur cathode delivers a high discharge capacity of 1313.9 mA h g−1 at 0.1C with a sulfur loading of 1.5 mg cm−2. Even at a high sulfur loading of 3.0 mg cm−2, it still demonstrates a stable cycling with a low capacity decay of 0.042 % per cycle after 200 cycles at 0.2C. This work provides new insights into understanding of heterostructured catalyst systems with balancing adsorption and catalysis for high-performance LSBs.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

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

Projekt

—

Návaznosti

N - Vyzkumna aktivita podporovana z neverejnych zdroju

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Journal of Energy Storage

ISSN

2352-152X

e-ISSN

2352-1538

Svazek periodika

125

Číslo periodika v rámci svazku

Neuveden

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

nestránkováno

Kód UT WoS článku

001490699100008

EID výsledku v databázi Scopus

2-s2.0-105004355447