TY - JOUR
T1 - Morphology and Crystallinity Effects of Nanochanneled Niobium Oxide Electrodes for Na-Ion Batteries
AU - Koroni, Cyrus
AU - Dixon, Kiev
AU - Barnes, Pete
AU - Hou, Dewen
AU - Landsberg, Luke
AU - Wang, Zihongbo
AU - Grbic, Galib
AU - Pooley, Sarah
AU - Frisone, Sam
AU - Olsen, Tristan
AU - Muenzer, Allison
AU - Nguyen, Dustin
AU - Bernal, Blayze
AU - Xiong, Hui
N1 - Publisher Copyright:
© 2023 The Authors. Published by American Chemical Society.
PY - 2024/2/21
Y1 - 2024/2/21
N2 - Niobium pentoxide (Nb2O5) 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 Nb2O5 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.
AB - Niobium pentoxide (Nb2O5) 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 Nb2O5 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.
KW - charge storage and transport
KW - crystallinity effect
KW - morphology effect
KW - nanochanneled niobium oxides
KW - negative electrode materials
KW - sodium ion batteries
UR - http://www.scopus.com/inward/record.url?scp=85179779354&partnerID=8YFLogxK
U2 - 10.1021/acsnanoscienceau.3c00031
DO - 10.1021/acsnanoscienceau.3c00031
M3 - Article
AN - SCOPUS:85179779354
VL - 4
SP - 76
EP - 84
JO - ACS Nanoscience Au
JF - ACS Nanoscience Au
IS - 1
ER -