首页|Oxygen vacancy-assisted construction of phosphorus-doped layers to improve the lithium storage performance of T-Nb2O5

Oxygen vacancy-assisted construction of phosphorus-doped layers to improve the lithium storage performance of T-Nb2O5

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  • NETL
  • NSTL
  • Elsevier
© 2024 Elsevier B.V.T-Nb2O5 is a promising anode material for high power density lithium-ion batteries (LIBs) due to its fast lithium storage capacity and safe lithiation potential. However, its practical application is hindered by its low electronic conductivity. In this work, we improved the electrochemical performance of T-Nb2O5 by surface P-doping and the N-doped carbon substrate. Surface P-doping guided by defects enhances the electronic conductivity of the material, which can synergize with N-doped carbon substrates to form a conductive network and accelerate the lithiation/delithiation process. More importantly, surface P-doping does not destroy the internal crystal structure of the material, ensuring the stability of the Nb2O5 during the charge/discharge process. When used as the anode for LIBs, the Nb2O5-P/N-C exhibits great cycling stability and high-current charge/discharge performance. The specific capacity of Nb2O5-P/N-C exceeds 116 mAh g−1 after 1000 cycles at 1000 mA g−1. This work presents a novel approach to improve the electrochemical performance of T-Nb2O5.

Anode materialDefect guidanceLithium-ion batteriesNiobium oxideSurface phosphorus doping

Wang X.、He R.、Bai Y.、Yao F.、Gao S.、Nie P.、Chang L.

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Key Laboratory of Preparation and Applications of Environmentally Friendly Material of the Ministry of Education & College of Chemistry Jilin Normal University

2025

10.1016/j.jpowsour.2024.235868

Journal of power sources

Journal of power sources

SCI
ISSN：0378-7753
年,卷(期)：2025.628(Feb.1)
  • 38