Co(acac)2-Mediated Regulation of Li2O2 Gradient Growth in Lithium–Oxygen Batteries DOI
Xingzi Zheng,

Peiyuan Su,

Jingshen Xu

et al.

Nano Letters, Journal Year: 2025, Volume and Issue: unknown

Published: April 27, 2025

In Li-O2 batteries, Li2O2 serves as the primary cathodic material but its wide band gap imparts insulating properties. Regulating composition and morphology of enables construction a novel structure with exceptional electrochemical performance. Herein, we introduce an organic salt containing cobalt ions, acetylacetonate (Co(acac)2), into electrolyte. We exploit cation migration characteristics under electric field to facilitate generation decomposition Co-doped Li2O2, achieving gradient control optimized growth Li2O2. Moreover, Co(acac)2 molecule stabilizes properties LiOx species mitigates side reaction. situ UV-vis XANES spectra reveal direct interactions between O2-/LiO2, highlighting superior reversibility enhanced batteries. Both experimental theoretical results indicate that this battery system exhibits rapid reaction kinetics, reduced overpotential 520 mV extended cyclability, surpassing 400 cycles lower polarization.

Language: Английский

Rationally tuning the oxidation state of the open active sites in Co-based MOFs to enhance the kinetics of Li-O2 batteries DOI
Peng Su, Xingzi Zheng, Si‐Ao Li

et al.

Rare Metals, Journal Year: 2025, Volume and Issue: unknown

Published: March 17, 2025

Language: Английский

Citations

1
Strong Metal‐Support Interactions in Heterogeneous Oxygen Electrocatalysis DOI Open Access
Zhiqian Hou,

Chenghao Cui,

Yanan Yang

et al.

Small, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 26, 2024

Molecular oxygen redox electrocatalysis involves reduction and evolution as core reactions in various energy conversion environmental technology fields. Strong metal-support interactions (SMSIs) based nanomaterials are regarded desirable state-of-the-art heterogeneous electrocatalysts due to their exceptional physicochemical properties. Over the past decades, considerable advancements theory experiment have been achieved related studies, especially modulating electronic structure geometrical configuration of SMSIs enable activity, selectivity, stability. In this focuses on concept SMSI, explore manifestations mechanisms action, summarizes recent advances for efficient applications. Additionally, correlation between properties different metals supports is systematically elucidated, potential structure-activity relationships catalytic performance outlined through theoretical models. Finally, obstacles confronting burgeoning field comprehensively concluded, targeted recommendations coping strategies proposed, future research perspectives outlined.

Language: Английский

Citations

4
Co(acac)2-Mediated Regulation of Li2O2 Gradient Growth in Lithium–Oxygen Batteries DOI
Xingzi Zheng,

Peiyuan Su,

Jingshen Xu

et al.

Nano Letters, Journal Year: 2025, Volume and Issue: unknown

Published: April 27, 2025

In Li-O2 batteries, Li2O2 serves as the primary cathodic material but its wide band gap imparts insulating properties. Regulating composition and morphology of enables construction a novel structure with exceptional electrochemical performance. Herein, we introduce an organic salt containing cobalt ions, acetylacetonate (Co(acac)2), into electrolyte. We exploit cation migration characteristics under electric field to facilitate generation decomposition Co-doped Li2O2, achieving gradient control optimized growth Li2O2. Moreover, Co(acac)2 molecule stabilizes properties LiOx species mitigates side reaction. situ UV-vis XANES spectra reveal direct interactions between O2-/LiO2, highlighting superior reversibility enhanced batteries. Both experimental theoretical results indicate that this battery system exhibits rapid reaction kinetics, reduced overpotential 520 mV extended cyclability, surpassing 400 cycles lower polarization.

Language: Английский

Citations

0