Quantum‑Size FeS2 with Delocalized Electronic Regions Enable High‑Performance Sodium‑Ion Batteries Across Wide Temperatures (IMAGE)
Caption
- 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.
Credit
Tianlin Li, Danyang Zhao, Meiyu Shi, Chao Tian, Jie Yi, Qing Yin, Yongzhi Li, Bin Xiao, Jiqiu Qi, Peng Cao, Yanwei Sui.
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CC BY-NC-ND