Enhanced Built-In Electric Field Facilitates Electron and Ion Transfer for High-Performance Lithium-Sulfur Batteries

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F25%3A43933842" target="_blank" >RIV/60461373:22310/25:43933842 - isvavai.cz</a>

Výsledek na webu

<a href="https://pubs.acs.org/doi/10.1021/acssuschemeng.5c09447" target="_blank" >https://pubs.acs.org/doi/10.1021/acssuschemeng.5c09447</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acssuschemeng.5c09447" target="_blank" >10.1021/acssuschemeng.5c09447</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Enhanced Built-In Electric Field Facilitates Electron and Ion Transfer for High-Performance Lithium-Sulfur Batteries

Popis výsledku v původním jazyce

The complex and multistep redox reactions of sulfur species result in severe polysulfide shuttling, which remains a key obstacle to the practical development of lithium-sulfur batteries (LSBs). To address this challenge, this study employs a rectifying interface constructed from molybdenum dioxide (MoO2) and nitrogen-deficient carbon nitride (DCN), with the aim of enhancing the catalytic conversion efficiency of lithium polysulfides (LiPSs) by regulating electron and ion transport through increased interfacial charge transfer between built-in electric fields. Kelvin probe force microscopy characterization confirms the increase in the work function difference at the heterojunction interface. In situ ultraviolet-visible spectroscopy findings further verify the significant enhancement of LiPS transformation kinetics by the MoO2-DCN heterojunction. The cell with MoO2-DCN separators demonstrates outstanding cycling stability across a wide temperature range (0 to 60 degrees C); specifically, after 100 cycles, the average capacity fade rates are as low as 0.082% and 0.21% per cycle, respectively. Notably, the cell achieves a high initial areal capacity of 7.39 mAh cm-2 even at the elevated sulfur loading of 6.09 mg cm-2. This work provides important experimental guidance for designing high-performance LSBs through the regulation of the heterointerfacial built-in electric field.

Název v anglickém jazyce

Enhanced Built-In Electric Field Facilitates Electron and Ion Transfer for High-Performance Lithium-Sulfur Batteries

Popis výsledku anglicky

The complex and multistep redox reactions of sulfur species result in severe polysulfide shuttling, which remains a key obstacle to the practical development of lithium-sulfur batteries (LSBs). To address this challenge, this study employs a rectifying interface constructed from molybdenum dioxide (MoO2) and nitrogen-deficient carbon nitride (DCN), with the aim of enhancing the catalytic conversion efficiency of lithium polysulfides (LiPSs) by regulating electron and ion transport through increased interfacial charge transfer between built-in electric fields. Kelvin probe force microscopy characterization confirms the increase in the work function difference at the heterojunction interface. In situ ultraviolet-visible spectroscopy findings further verify the significant enhancement of LiPS transformation kinetics by the MoO2-DCN heterojunction. The cell with MoO2-DCN separators demonstrates outstanding cycling stability across a wide temperature range (0 to 60 degrees C); specifically, after 100 cycles, the average capacity fade rates are as low as 0.082% and 0.21% per cycle, respectively. Notably, the cell achieves a high initial areal capacity of 7.39 mAh cm-2 even at the elevated sulfur loading of 6.09 mg cm-2. This work provides important experimental guidance for designing high-performance LSBs through the regulation of the heterointerfacial built-in electric field.

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

ACS Sustainable Chemistry &amp; Engineering

ISSN

2168-0485

e-ISSN

2168-0485

Svazek periodika

13

Číslo periodika v rámci svazku

46

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

12

Strana od-do

20253-20264

Kód UT WoS článku

001609991900001

EID výsledku v databázi Scopus

2-s2.0-105022798778