Enabling High‐Power‐Density Zn‐Air Batteries via Oxygen Trapping in Lotus‐Effect‐Inspired Hydrophobic Air Electrodes DOI
Yue Wu, Zhenyu Sun, Cuie Wang

и другие.

Small, Год журнала: 2025, Номер unknown

Опубликована: Май 24, 2025

Abstract The sluggish oxygen diffusion kinetics at the triple‐phase boundary of air cathode significantly limit optimal power output Zn‐air batteries (ZABs). Inspired by “lotus effect”, this study developed a bifunctional electrocatalyst, Co─NCNTs, featuring lotus leaf‐like structure, and constructed 3D hydrophobic architecture to expand boundaries. Consequently, Co─NCNTs electrode (contact angle >140°) demonstrated enhanced adsorption on surface compared hydrophilic Co─NC <70°). assembled ZABs incorporating lotus‐effect‐inspired bionic achieved remarkable density 341 mW cm −2 , nearly double that Co─NC‐based battery (178 ), exhibited exceptional cycling stability, operating continuously for 700 h current 10 mA . This work highlights efficacy interface engineering in improving reaction cathodes through design, offering promising strategy enhancing oxygen‐involved energy storage systems.

Язык: Английский

Triggering Synergistic Electronic Effect via Electron‐Directed Transfer within PtNPs‐Fe/NC Oxygen Reduction Catalyst for Zinc‐Air Batteries DOI

Quanlei Ma,

Yijing Liao,

Qin Zhao

и другие.

Small, Год журнала: 2025, Номер unknown

Опубликована: Фев. 28, 2025

Abstract Rationally tuning Fe‐N‐C catalysts with synergistic nanoparticles for efficient oxygen reduction reaction (ORR) still remains challenging. Here, a nitrogen‐doped carbon‐supported bimetallic catalyst (Pt NPs ‐Fe/NC), combining atomically dispersed sites Pt nanoparticles, is synthesized. Experimental results reveal directional electron transfer between and Fe sites, which induces an effect, effectively modulating the density around sites. The modulation significantly enhances ORR catalytic activity of ‐Fe/NC. As result, ‐Fe/NC displays half‐wave potential 0.901 V (versus RHE) Tafel slope 59 mV dec −1 , surpassing performance commercial Pt/C demonstrating accelerated kinetics. In meantime, maintains excellent durability in terms stability as well. When assembled into liquid zinc‐air batteries (ZABs), delivers peak power 201.48 mW cm −2 specific capacity 809 mAh g . Additionally, ‐Fe/NC‐based flexible ZABs display outstanding discharge cycling stability. This work highlights effectiveness multiscale advancing provides valuable insights construction strategies energy storage applications.

Язык: Английский

Процитировано

1
Structural Modulation and Adsorptive Behavior of CuFe-LDHs-derived Catalysts through Mn Doping: Dual Enhancement of Low-Temperature Catalytic Performance and Sulfur Resistance DOI
Jun Liu, Bin Jia, Xiaoqing Liu

и другие.

ACS Catalysis, Год журнала: 2025, Номер unknown, С. 5123 - 5141

Опубликована: Март 12, 2025

Язык: Английский

Процитировано

0
Single‐Atom Co Meets Remote Fe for a Synergistic Boost in Oxygen Electrocatalysis DOI Creative Commons
Zongge Li, Wenjun Kang, Jingkai Lin

и другие.

Advanced Energy Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 16, 2025

Abstract The oxygen electrocatalytic activity of transition metal catalysts can be tuned by tailoring their microstructure to optimize electronic configuration. Here, a one‐step Coordination‐Selective Synthesis strategy is developed integrate Co single‐atom sites and Fe‐based nanoparticles within the same matrix, enabling long‐range interactions that enhance Co‐N 4 reactivity improve reduction reaction performance. X‐ray absorption spectroscopy confirmed remote modulate electron distribution at sites. Structural characterizations reveal optimal catalyst, 50% Fe ‐NC, contains metallic Fe, 3 O , N species. Electrochemical measurements show it achieves onset half‐wave potentials 0.984 0.927 V versus RHE, surpassing 100% ‐NC with only Additionally, demonstrates efficient evolution performance, achieving an overpotential 298 mV 20 mA cm −2 comparable RuO 2 . Density functional theory calculations optimizes O‐containing intermediate adsorption/desorption, lowering theoretical overpotential. Zn‐air batteries assembled exhibited superior performance Pt/C, highlighting its potential for bifunctional electrocatalysis. This study provides approach designing high‐performance utilizing synergistic between atomic nanoscale

Язык: Английский

Процитировано

0
Unraveling active ensembles consisting of clusters and single atoms for oxygen reduction: a synergy of machine learning and DFT calculations DOI
Xinyi Li,

Dongxu Jiao,

Jingxiang Zhao

и другие.

Inorganic Chemistry Frontiers, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Combining ML and DFT, we screened 1521 candidates to identify 24 active ORR catalysts. Key metal features correlate with η , enabling efficient optimization. Pt 3 Ni-CoNC, Ni-ZnNC, V-ZnNC, Mo-CoNC show high activity durability.

Язык: Английский

Процитировано

0
Enabling High‐Power‐Density Zn‐Air Batteries via Oxygen Trapping in Lotus‐Effect‐Inspired Hydrophobic Air Electrodes DOI
Yue Wu, Zhenyu Sun, Cuie Wang

и другие.

Small, Год журнала: 2025, Номер unknown

Опубликована: Май 24, 2025

Abstract The sluggish oxygen diffusion kinetics at the triple‐phase boundary of air cathode significantly limit optimal power output Zn‐air batteries (ZABs). Inspired by “lotus effect”, this study developed a bifunctional electrocatalyst, Co─NCNTs, featuring lotus leaf‐like structure, and constructed 3D hydrophobic architecture to expand boundaries. Consequently, Co─NCNTs electrode (contact angle >140°) demonstrated enhanced adsorption on surface compared hydrophilic Co─NC <70°). assembled ZABs incorporating lotus‐effect‐inspired bionic achieved remarkable density 341 mW cm −2 , nearly double that Co─NC‐based battery (178 ), exhibited exceptional cycling stability, operating continuously for 700 h current 10 mA . This work highlights efficacy interface engineering in improving reaction cathodes through design, offering promising strategy enhancing oxygen‐involved energy storage systems.

Язык: Английский

Процитировано

0