Rational Design of Carbon Covered V₂O_3‐x Decorated Amorphous MoO₂ Double‐Core–Shell Structure Facilitates Ultra‐High Stability and High‐Rate Performance in Lithium‐ion Batteries

Small, Journal Year: 2025, Volume and Issue: unknown

Published: April 24, 2025

Abstract Amorphous materials, which bear unique atomic arrangements, have garnered significant study on lithium‐ion batteries due to inherent properties, including isotropy and defect distribution. Herein, a novel amorphous MoO 2‐ x @V 2 O 3‐ @C double‐core–shell structure is ingeniously designed by simple solvothermal pyrolytic reactions, the valence states of V 3 are precisely characterized using X‐ray absorption near‐edge spectroscopic measurements. In situ XRD, in EIS density functional theory calculations confirm that enhances electronic conductivity @C‐2, optimizes Li + relocation paths associated energy barriers, thus improving diffusion kinetics. Furthermore, formation layer, along with establishment 3D network carbon, enhanced mitigated swelling electrodes, thereby stability during battery cycling. Benefiting from this multiscale coordinated design, optimized electrodes exhibit high discharge capacity 477.5 mAh g −1 at 10.0 A , exceptional cycling stability, showing minimal loss even after undergoing 1000 cycles 20.0 . Additionally, @C||LiCoO full maintain good over 300 cycles. The proposed core–shell fabrication concept offers insights into developing advanced high‐efficiency storage materials.

Language: Английский

Electrospun sandwich-structured C@Si/C@C as anode for advanced lithium-ion batteries

Applied Surface Science, Journal Year: 2025, Volume and Issue: unknown, P. 163139 - 163139

Published: April 1, 2025

Language: Английский