Highlights High-entropy (Mn,Fe,Co,Ni,Zn) oxide nanofibers (NFs) are evaluated as LIB anodes. The existence of a microstructure-performance relationship is demonstrated. NFs with larger and less defective grains show superior stability and rate-capability. Best anodes deliver 453 mAh g−1 after 550 cycles at 0.5 A g−1, and 210 mAh g−1 at 2 A g−1. Long-term (≥650 cycles) capacity fading is due to the formation of Fe°, Co°, and Ni°.
Role of the Microstructure in the Li-Storage Performance of Spinel-Structured High-Entropy (Mn,Fe,Co,Ni,Zn) Oxide Nanofibers
Pagot G.;Di Noto V.;
2024
Abstract
Highlights High-entropy (Mn,Fe,Co,Ni,Zn) oxide nanofibers (NFs) are evaluated as LIB anodes. The existence of a microstructure-performance relationship is demonstrated. NFs with larger and less defective grains show superior stability and rate-capability. Best anodes deliver 453 mAh g−1 after 550 cycles at 0.5 A g−1, and 210 mAh g−1 at 2 A g−1. Long-term (≥650 cycles) capacity fading is due to the formation of Fe°, Co°, and Ni°.
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