Triphase Heterogeneous Electrocatalysts of Ni and Co for High‐Performing Li‐O2 Batteries DOI Creative Commons
Shadeepa Karunarathne, Chanaka Sandaruwan, Yasun Y. Kannangara

et al.

EcoMat, Journal Year: 2025, Volume and Issue: 7(3)

Published: Feb. 16, 2025

ABSTRACT The limited energy density of the current Li‐ion batteries restricts electrification transportation to small‐ and medium‐scale vehicles. On contrary, Li‐O 2 (LOBs), with their significantly higher theoretical density, can power heavy‐duty transportation, if sluggish electrode kinetics in these devices be substantially improved. use solid electrocatalysts at cathode is a viable strategy address this challenge, but fail provide sufficient discharge depths cyclability, primarily due formation film‐like product, Li₂O₂, on catalytic sites, which obstructs charge transport gas diffusion pathways. Here, we report that triphase heterogeneous catalyst comprising NiCoP, NiCo S 4 , O assembled into hierarchical hollow architecture (NC‐3@Ni), efficiently modulates morphology orientation facilitating sheet‐like growth Li perpendicular surface. These modifications enable LOB deliver high capacity 25 162 mAh g −1 400 mA along impressive cycling performance, achieving 270 cycles depth 1000 exceeding 1350 h continuous operation. This promising performance attributed presence individual electrophilic nucleophilic phases within microstructure catalyst, collectively promoting . image

Language: Английский

Surface acidity regulation for boosting Li2O2 decomposition towards lower charge overpotential Li–O2 batteries DOI
Qian Liu,

Renshu Huang,

Xincheng Liang

et al.

Energy storage materials, Journal Year: 2024, Volume and Issue: unknown, P. 103921 - 103921

Published: Nov. 1, 2024

Language: Английский

Citations

4
Open active sites of Co-MOF functionalized Ti3C2 MXene heterostructure with the enhanced performance in Li-O2 battery DOI
Xingzi Zheng, Mengwei Yuan,

Peiyuan Su

et al.

Applied Surface Science, Journal Year: 2025, Volume and Issue: unknown, P. 162742 - 162742

Published: Feb. 1, 2025

Language: Английский

Citations

0
Upcycling Spent Cathodes from Li–Ion Batteries into a High-Entropy Alloy Catalyst with Reverse Electron Transfer for Li–O2 Batteries DOI
Peng Wang, Shan Guo, Yongbin Xu

et al.

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

Published: April 30, 2025

Traditional recovery of valuable metals from spent ternary lithium-ion batteries concentrates on complicated pyrometallurgy and hydrometallurgy routes. Direct reutilization these used to catalyze Li-O2 is highly appealing yet remains a significant challenge. Here, we report general synthesis ultrafine αNiCoMn (α = Pt, Ir, Ru) high-entropy alloy (HEA) nanoparticles anchored nitrogen-doped carbon (N-C) support through facile one-step Joule heating, which serves as high-efficiency catalyst for batteries. Solution alloying recycled NiCoMn with Pt group facilitates catalytic efficiency 3d-5d electronic interactions the assembly effect. Both experimental calculation results reveal that, driven by rapid, nonequilibrium thermal shock, electron transfer defies conventional expectations, where electrons are inclined higher electronegative surrounding atoms. This interesting reverse local charge redistribution orbital hybridization endow an elevated d-band center optimized structure. The induced coordination effects further generate active catalysis surfaces, favoring adsorption LiO2 intermediates facilitating rapid decomposition kinetics nanoscale Li2O2 products. These advantages HEA@N-C superior bifunctional activity, achieving ultralow polarization 0.27 V significantly enhanced cycling life 240 cycles. We anticipate that this work will provide insights into upcycling constructing efficient HEA electrocatalysts.

Language: Английский

Citations

0
Anti‐Self‐Discharge Capability of Zn‐Halogen Batteries Through an Entrapment‐Adsorption‐Catalysis Strategy Built Upon Separator DOI Open Access
Jie Yang, Qiqi Dai, Shuang Hou

et al.

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 5, 2025

Abstract Aqueous Zn‐halogen batteries (Zn‐I 2 /Br ) suffer from grievous self‐discharge behavior, resulting in irreversible loss of active cathode material and severe corrosion zinc anode, which ultimately leads to rapid battery failure. Herein, an entrapment‐adsorption‐catalysis strategy is reported, leveraging Zn─Mn atom pairs‐modified glass fiber separator (designated as ZnMn‐NC/GF), effectively mitigate the phenomenon. The situ Raman UV experiments, along with theoretical calculations, confirmed single‐atom Mn sites are responsible for polyiodides adsorption, while pairs facilitated conversion reaction intermediates. As a result, utilization rate species enhanced through this ZnMn‐NC/GF separator. fully charged Zn‐I assembled maintained Coulombic efficiency (CE) 90.1% after being left 120 h, well capacity retention 95.3% 30000 cycles at current density 5 A g −1 . Additionally, Zn‐Br designed can withstand more serious problems bromine species, average discharge voltage platform 1.75 V 0.5 problem aqueous significantly suppressed by strategy, serve crucial reference advancement high‐performance batteries.

Language: Английский

Citations

0
Triphase Heterogeneous Electrocatalysts of Ni and Co for High‐Performing Li‐O2 Batteries DOI Creative Commons
Shadeepa Karunarathne, Chanaka Sandaruwan, Yasun Y. Kannangara

et al.

EcoMat, Journal Year: 2025, Volume and Issue: 7(3)

Published: Feb. 16, 2025

ABSTRACT The limited energy density of the current Li‐ion batteries restricts electrification transportation to small‐ and medium‐scale vehicles. On contrary, Li‐O 2 (LOBs), with their significantly higher theoretical density, can power heavy‐duty transportation, if sluggish electrode kinetics in these devices be substantially improved. use solid electrocatalysts at cathode is a viable strategy address this challenge, but fail provide sufficient discharge depths cyclability, primarily due formation film‐like product, Li₂O₂, on catalytic sites, which obstructs charge transport gas diffusion pathways. Here, we report that triphase heterogeneous catalyst comprising NiCoP, NiCo S 4 , O assembled into hierarchical hollow architecture (NC‐3@Ni), efficiently modulates morphology orientation facilitating sheet‐like growth Li perpendicular surface. These modifications enable LOB deliver high capacity 25 162 mAh g −1 400 mA along impressive cycling performance, achieving 270 cycles depth 1000 exceeding 1350 h continuous operation. This promising performance attributed presence individual electrophilic nucleophilic phases within microstructure catalyst, collectively promoting . image

Language: Английский

Citations

0