Built-in electric field-driven NiSe2-NiMoO4 heterostructure for synergistic confinement-conversion regulation of polysulfides

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F25%3A43933843" target="_blank" >RIV/60461373:22310/25:43933843 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S2211285525007761" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2211285525007761</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.nanoen.2025.111417" target="_blank" >10.1016/j.nanoen.2025.111417</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Built-in electric field-driven NiSe2-NiMoO4 heterostructure for synergistic confinement-conversion regulation of polysulfides

Popis výsledku v původním jazyce

Lithium-sulfur batteries (LSBs) have become a research hotspot for next-generation energy storage systems due to their high theoretical energy density and low cost, however, the shuttle effect and slow reaction kinetics of polysulfides (LiPSs) severely limit their practical applications. In this study, a strategy is proposed to synergistically suppress the shuttle effect while promoting the conversion of LiPSs by constructing flower-like NiSe2-NiMoO4 heterostructure-modified separators. NiMoO4 effectively anchors LiPSs by virtue of its strong adsorption capacity, while the difference in the work function of NiSe2 and NiMoO4 induces the formation of a built-in electric field, which significantly accelerates the kinetics of interfacial charge transfer and transformation of LiPSs. Combined experimental and theoretical calculations demonstrate that the heterostructure not only provides dual physical-chemical confinement for LiPSs, but also optimizes the Li2S deposition/dissociation process through electric-field modulation. The cell with NiSe2-NiMoO4 separator exhibits an ultralow capacity decay rate of merely 0.064 % per cycle over 500 cycles at 0.5 C. Furthermore, it demonstrates exceptional temperature adaptability, retaining 90.2 % and 70.9 % of its initial capacity after 150 cycles under low-temperature (0 degrees C) and high-temperature (60 degrees C) conditions, respectively. Notably, the cell with NiSe2-NiMoO4 separator delivers a high areal capacity of 5.6 mAh cm-2 even under a high sulfur loading of 6.4 mg cm-2, demonstrating excellent electrochemical performance under practical electrode conditions. This work proposes a novel design strategy for high-performance LSBs interfaces by leveraging built-in electric fields in heterojunction architectures.

Název v anglickém jazyce

Built-in electric field-driven NiSe2-NiMoO4 heterostructure for synergistic confinement-conversion regulation of polysulfides

Popis výsledku anglicky

Lithium-sulfur batteries (LSBs) have become a research hotspot for next-generation energy storage systems due to their high theoretical energy density and low cost, however, the shuttle effect and slow reaction kinetics of polysulfides (LiPSs) severely limit their practical applications. In this study, a strategy is proposed to synergistically suppress the shuttle effect while promoting the conversion of LiPSs by constructing flower-like NiSe2-NiMoO4 heterostructure-modified separators. NiMoO4 effectively anchors LiPSs by virtue of its strong adsorption capacity, while the difference in the work function of NiSe2 and NiMoO4 induces the formation of a built-in electric field, which significantly accelerates the kinetics of interfacial charge transfer and transformation of LiPSs. Combined experimental and theoretical calculations demonstrate that the heterostructure not only provides dual physical-chemical confinement for LiPSs, but also optimizes the Li2S deposition/dissociation process through electric-field modulation. The cell with NiSe2-NiMoO4 separator exhibits an ultralow capacity decay rate of merely 0.064 % per cycle over 500 cycles at 0.5 C. Furthermore, it demonstrates exceptional temperature adaptability, retaining 90.2 % and 70.9 % of its initial capacity after 150 cycles under low-temperature (0 degrees C) and high-temperature (60 degrees C) conditions, respectively. Notably, the cell with NiSe2-NiMoO4 separator delivers a high areal capacity of 5.6 mAh cm-2 even under a high sulfur loading of 6.4 mg cm-2, demonstrating excellent electrochemical performance under practical electrode conditions. This work proposes a novel design strategy for high-performance LSBs interfaces by leveraging built-in electric fields in heterojunction architectures.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10400 - Chemical sciences

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Nano Energy

ISSN

2211-2855

e-ISSN

2211-3282

Svazek periodika

144

Číslo periodika v rámci svazku

November 2025

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

11

Strana od-do

111417

Kód UT WoS článku

001562827800001

EID výsledku v databázi Scopus

2-s2.0-105014529866