Fe-Doped Ni2P Nanosheet Arrays as Self-supported Anodes for Sodium-Ion Batteries DOI
Chao Wang, Balaji Murugesan, Wenwen Li

et al.

ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 2, 2025

Conversion-type anode materials, particularly transition metal phosphides (TMPs), are considered to be highly promising candidates for sodium-ion batteries (SIBs) due their substantial theoretical capacity, which can reach up 1000 mAh g–1, as well cost-effectiveness. But practical application is constrained by significant changes, including volume changes during charge/discharge cycles and poor reaction kinetics. Addressing these challenges requires precise nanoscale engineering optimize material structure functionality. Herein, we present the fabrication of a carbon-coated, Fe-doped nickel phosphide (Fe–Ni2P@C) nanosheet array directly grown on three-dimensional foam (NF) substrate via simple hydrothermal phosphating process. The hierarchical architecture offers several advantages: nanosheets provide abundant active sites electrochemical reactions significantly reduce Na+ diffusion distances, while carbon coating effectively suppresses expansion cycling. Additionally, Fe doping at introduces phosphorus vacancies increases material's intrinsic conductivity This synergistic design enables Fe–Ni2P@C arrays function self-supported materials without need binders, additives, or additional processing steps. As result, achieves exceptional sodium storage performance, exhibiting rate capability 317.16 g–1 current density 2 A reversible capacity 418.89 following 500 0.5 g–1. study highlights critical role in overcoming limitations TMP-based anodes provides facile scalable approach developing high-performance, SIBs future.

Language: Английский

Fe-Doped Ni2P Nanosheet Arrays as Self-supported Anodes for Sodium-Ion Batteries DOI
Chao Wang, Balaji Murugesan, Wenwen Li

et al.

ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 2, 2025

Conversion-type anode materials, particularly transition metal phosphides (TMPs), are considered to be highly promising candidates for sodium-ion batteries (SIBs) due their substantial theoretical capacity, which can reach up 1000 mAh g–1, as well cost-effectiveness. But practical application is constrained by significant changes, including volume changes during charge/discharge cycles and poor reaction kinetics. Addressing these challenges requires precise nanoscale engineering optimize material structure functionality. Herein, we present the fabrication of a carbon-coated, Fe-doped nickel phosphide (Fe–Ni2P@C) nanosheet array directly grown on three-dimensional foam (NF) substrate via simple hydrothermal phosphating process. The hierarchical architecture offers several advantages: nanosheets provide abundant active sites electrochemical reactions significantly reduce Na+ diffusion distances, while carbon coating effectively suppresses expansion cycling. Additionally, Fe doping at introduces phosphorus vacancies increases material's intrinsic conductivity This synergistic design enables Fe–Ni2P@C arrays function self-supported materials without need binders, additives, or additional processing steps. As result, achieves exceptional sodium storage performance, exhibiting rate capability 317.16 g–1 current density 2 A reversible capacity 418.89 following 500 0.5 g–1. study highlights critical role in overcoming limitations TMP-based anodes provides facile scalable approach developing high-performance, SIBs future.

Language: Английский

Citations

0