Morphology and Crystallinity Effects of Nanochanneled Niobium Oxide Electrodes for Na-Ion Batteries.

Autor: Koroni C; Micron School of Materials Science & Engineering, Boise State University, Boise, Idaho 83725, United States., Dixon K; Micron School of Materials Science & Engineering, Boise State University, Boise, Idaho 83725, United States., Barnes P; Micron School of Materials Science & Engineering, Boise State University, Boise, Idaho 83725, United States.; Energy Storage and Electric Vehicle Department, Idaho National Laboratory, Idaho Falls, Idaho 83401, United States., Hou D; Micron School of Materials Science & Engineering, Boise State University, Boise, Idaho 83725, United States.; Center for Nanoscale Materials, Argonne National Laboratory, Lemont, Illinois 60439, United States., Landsberg L; Micron School of Materials Science & Engineering, Boise State University, Boise, Idaho 83725, United States., Wang Z; Micron School of Materials Science & Engineering, Boise State University, Boise, Idaho 83725, United States., Grbic' G; Micron School of Materials Science & Engineering, Boise State University, Boise, Idaho 83725, United States., Pooley S; Micron School of Materials Science & Engineering, Boise State University, Boise, Idaho 83725, United States., Frisone S; Micron School of Materials Science & Engineering, Boise State University, Boise, Idaho 83725, United States., Olsen T; Micron School of Materials Science & Engineering, Boise State University, Boise, Idaho 83725, United States., Muenzer A; Micron School of Materials Science & Engineering, Boise State University, Boise, Idaho 83725, United States., Nguyen D; Micron School of Materials Science & Engineering, Boise State University, Boise, Idaho 83725, United States., Bernal B; Micron School of Materials Science & Engineering, Boise State University, Boise, Idaho 83725, United States., Xiong H; Micron School of Materials Science & Engineering, Boise State University, Boise, Idaho 83725, United States.
Jazyk: angličtina
Zdroj: ACS nanoscience Au [ACS Nanosci Au] 2023 Nov 22; Vol. 4 (1), pp. 76-84. Date of Electronic Publication: 2023 Nov 22 (Print Publication: 2024).
DOI: 10.1021/acsnanoscienceau.3c00031
Abstrakt: Niobium pentoxide (Nb 2 O 5 ) is a promising negative electrode for sodium ion batteries (SIBs). By engineering the morphology and crystallinity of nanochanneled niobium oxides (NCNOs), the kinetic behavior and charge storage mechanism of Nb 2 O 5 electrodes were investigated. Amorphous and crystalline NCNO samples were made by modulating anodization conditions (20-40 V and 140-180 °C) to synthesize nanostructures of varying pore sizes and wall thicknesses with identical chemical composition. The electrochemical energy storage properties of the NCNOs were studied, with the amorphous samples showing better overall rate performance than the crystalline samples. The enhanced rate performance of the amorphous samples is attributed to the higher capacitive contributions and Na-ion diffusivity analyzed from cyclic voltammetry (CV) and the galvanostatic intermittent titration technique (GITT). It was found that the amorphous samples with smaller wall thicknesses facilitated improved kinetics. Among samples with similar pore size and wall thickness, the difference in their power performance stems from the crystallinity effect, which plays a more significant role in the resulting kinetics of the materials for Na-ion batteries.
Competing Interests: The authors declare no competing financial interest.
(© 2023 The Authors. Published by American Chemical Society.)
Databáze: MEDLINE
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