Integrated hierarchical lanthanum niobium oxide surface coating to stabilize high-voltage performance and suppress Ni2+/Li+ cationic disorder in nickel-rich layered cathodes

Journal of Energy Storage, Journal Year: 2024, Volume and Issue: 104, P. 114639 - 114639

Published: Nov. 18, 2024

Language: Английский

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Reaction kinetics and capacity decay mechanism of NaNi1/3Fe1/3Mn1/3O2@activated carbon cathode of sodium ion batteries

Journal of Power Sources, Journal Year: 2024, Volume and Issue: 628, P. 235899 - 235899

Published: Nov. 27, 2024

Language: Английский

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In Situ Construction T-Nb2o5 Nanolayer on Porous Carbon Cloth as Binder-Free Anode for Lithium-Ion Battery with Long Cycle Life

Published: Jan. 1, 2024

Metastable orthorhombic niobium pentoxide (T-Nb2O5) with fast lithium storage capability and safe operating voltage are recognized as suitable anode material for high power density lithium-ion batteries (LIBs). While, the T-Nb2O5 also suffers from low electrical conductivity in practical applications. In this work, electrochemical performance of is enhanced by constructing a free-standing electrode introducing N-doped carbon substrate. The consisting network-structured Nb2O5 layer porous cloth (PCC) avoids use binders benefits electron transport. addition, introduction substrate beneficial to enhance electronic Nb2O5. When used LIBs, PCC@Nb2O5 demonstrates excellent long cycle life rate performance, specific capacity over 150 mAh g-1 after 3200 cycles at current 1000 mA g-1. This strategy electrodes provides new options obtaining high-performance electrodes.

Language: Английский

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High Structural Stability and Li-Conduction of Lini0.8co0.1mn0.1o2 Cathode Co-Coated Al2o3 And Linbo3 For High Performance Lithium-Ion Battery

Published: Jan. 1, 2024

Language: Английский

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Quantifying Amorphous Structures on the nm Scale: LiNbO3 Coatings in Solid State Batteries

Microscopy and Microanalysis, Journal Year: 2024, Volume and Issue: 30(Supplement_1)

Published: July 1, 2024

Language: Английский

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Using High Valence Nb to Regulate the Superlattice Structure for the Na-Ion Layered Oxide Cathode with Superior Electrochemical Performance

Energy & Fuels, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 16, 2024

It is possible to enhance energy density in sodium-ion batteries by increasing the cutoff voltage, however, high voltage operation brings challenges performance of cathode materials. The integration honeycomb-like superlattice structures into materials has potential high-voltage performance; yet, risk irreparable structural damage occurring under extreme conditions cannot be ignored. This study introduces a valence element, Nb, an innovative manner, using its induced elemental segregation effect, implement modification strategy for P2–Na0.80Li0.13Ni0.20Mn0.67–xNbxO2 structure cathodes. includes surface alkali treatment, coating layer design, sodium vacancy control, and crystal improvement develop enhanced with range 1.5–4.5 V. noteworthy that doping bring about production C2/m symmetric Na3NbO4 compounds distinctive [NbO5] [NaO5] five-coordination structures. not only interfacial stability but also improves ion transfer efficiency. increases initial discharge specific capacity 196.3 mA h g–1, facilitating formation stable lithium manganese capable functioning across broad range. After 100 cycles at 0.5 C, retention rate 88.3%, very good (93.1 g–1 5 C). presents new design cathodes batteries.

Language: Английский

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Nb-doped Na0.75Co0.20Mn0.78Nb0.02O2 cathode with excellent cyclability for Na-ion batteries

Chemical Physics Letters, Journal Year: 2024, Volume and Issue: unknown, P. 141836 - 141836

Published: Dec. 1, 2024

Language: Английский

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