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Updated: Mar 20, 2026
08:13
Chemical Precipitation Method for the Synthesis of Nb2O5 Modified Bulk Nickel Catalysts with High Specific Surface Area
Published on: February 19, 2018
12.5K
High-Rate Intercalation without Nanostructuring in Metastable Nb2O5 Bronze Phases
Kent J Griffith1, Alexander C Forse1, John M Griffin1
1Department of Chemistry, University of Cambridge , Cambridge CB2 1EW, U.K.
Journal of the American Chemical Society
|June 7, 2016
Summary
High capacity and fast charge rates in niobium pentoxide (Nb2O5) are inherent properties of its bulk crystal structure, not requiring nanostructuring for energy storage applications.
Area of Science:
- Materials Science
- Electrochemistry
- Solid-State Chemistry
Background:
- Nanostructuring is a common strategy to enhance energy storage material performance.
- Niobium pentoxide (Nb2O5) polymorphs are explored for lithium intercalation.
Purpose of the Study:
- To investigate the intrinsic electrochemical properties of T- and TT-phases of Nb2O5.
- To determine if nanostructuring is essential for achieving high capacity and rate performance in Nb2O5.
Main Methods:
- Electrochemical analysis of micrometer-sized Nb2O5 particles.
- High-resolution (6/7)Li solid-state nuclear magnetic resonance (NMR) spectroscopy.
- Variable-temperature NMR to study lithium dynamics.
Main Results:
- T-phase Nb2O5 exhibits high capacity limited only by Ohmic drop up to 60C without nanostructuring.
- H-phase Nb2O5 shows high intercalation capacity at moderate rates.
- NMR reveals fast lithium dynamics in T-Nb2O5 with low activation energies.
Conclusions:
- The capacity and rate performance of T- and TT-Nb2O5 are intrinsic properties of their bulk crystal structure.
- High rate performance can be achieved in complex insulating oxides without nanostructuring.
- Nb2O5 merits consideration for energy storage applications due to its exceptional properties and synthesis.
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