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Related Experiment Video

Updated: Feb 13, 2026

ECM Protein Nanofibers and Nanostructures Engineered Using Surface-initiated Assembly

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Published on: April 17, 2014

Time-Engineered Hydrothermal Nb₂O₅ Nanostructures for High-Performance Asymmetric Supercapacitors.

Rutuja U Amate¹, Mrunal K Bhosale¹, Aviraj M Teli²

¹School of Chemical Engineering, Yeungnam University, 280 Daehak-ro, Gyeongsan 38541, Republic of Korea.

Nanomaterials (Basel, Switzerland)

|February 12, 2026

Summary

Hydrothermal synthesis time controls niobium pentoxide (Nb₂O₅) nanostructures for supercapacitors. Optimized 12-hour synthesis yields high capacitance, fast kinetics, and excellent stability for advanced energy storage.

Keywords:

Nb2O5 nanostructures asymmetric supercapacitor diffusion-controlled charge storage energy storage materials hydrothermal time engineering pseudocapacitance

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Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System

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Published on: January 7, 2022

Area of Science:

Materials Science
Electrochemistry
Nanotechnology

Background:

Precise control over nanostructure evolution is crucial for optimizing pseudocapacitive material performance.
Niobium pentoxide (Nb₂O₅) is a promising material for energy storage applications.

Purpose of the Study:

To investigate the influence of hydrothermal reaction duration on Nb₂O₅ nanostructure development.
To correlate structural and morphological properties with electrochemical performance for supercapacitor applications.

Main Methods:

Synthesis of Nb₂O₅ nanostructures via a time-engineered hydrothermal route (6, 12, 18 h).
Structural and morphological characterization using advanced analytical techniques.
Electrochemical evaluation of supercapacitor performance, including capacitance, kinetics, and cycling stability.

Main Results:

Phase-pure monoclinic Nb₂O₅ with stable Nb⁵⁺ oxidation state was formed.
A 12 h reaction time yielded hierarchical architectures with interconnected porosity, enhancing ion diffusion and surface exposure.
The NbO-12 electrode exhibited high areal capacitance (5.504 F cm^-2 at 8 mA cm^-2), fast kinetics, low resistance, and 85.73% capacitance retention over 12,000 cycles.
An asymmetric supercapacitor demonstrated a 1.5 V stable window and an energy density of 0.101 mWh cm^-2.

Conclusions:

Hydrothermal reaction-time engineering is an effective strategy for tailoring Nb₂O₅ nanostructures.
Optimized Nb₂O₅ nanostructures offer significant potential for high-performance pseudocapacitive electrodes in advanced energy storage systems.