Quantum-Size FeS2 with Delocalized Electronic Regions Enable High-Performance Sodium-Ion Batteries Across Wide Temperatures

Quantum-Size FeS2 with Delocalized Electronic Regions Enable High-Performance Sodium-Ion Batteries Across Wide Temperatures

Highlights Quantum-scaled FeS2 induces delocalized electronic regions, effectively reducing electrostatic potential barriers and accelerating Na+ diffusion kinetics. The free charge accumulation regions were formed by edge mismatched atoms, activating numerous electrochemically sites to enable high-...

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Bibliographic Details
Main Authors: Tianlin Li, Danyang Zhao, Meiyu Shi, Chao Tian, Jie Yi, Qing Yin, Yongzhi Li, Bin Xiao, Jiqiu Qi, Peng Cao, Yanwei Sui
Format: Article
Language:English
Published: SpringerOpen 2025-07-01
Series:Nano-Micro Letters
Subjects:
Quantum-size effect
Electron delocalization
Efficient short-range transfer kinetics
Wide-temperature
Sodium-ion batteries
Online Access:https://doi.org/10.1007/s40820-025-01858-2
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Summary:Highlights Quantum-scaled FeS2 induces delocalized electronic regions, effectively reducing electrostatic potential barriers and accelerating Na+ diffusion kinetics. The free charge accumulation regions were formed by edge mismatched atoms, activating numerous electrochemically sites to enable high-capacity Na+ storage and ultrafast-ion transport across wide temperature range (−35 to 65 °C). The FeS2 QD/MXene anode delivers superior wide-temperature capacity of 255.2 mAh g−1 (−35 °C) and 424.9 mAh g−1 (65 °C) at 0.1 A g−1. The FeS2 QD/MXene//NVP cell achieves a record energy density of 162.4 Wh kg⁻1 at − 35 °C.
ISSN:2311-6706
2150-5551

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