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Title: Electrochemically Triggered Metal-Insulator Transition between VO2 and V2O5

Journal Article · · Advanced Functional Materials
ORCiD logo [1];  [1];  [2];  [2];  [3];  [4];  [2];  [5]
  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Lab. for Electrochemical Interfaces; Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Dept. of Materials Science and Engineering
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Chemical Sciences Division
  4. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Dept. of Materials Science and Engineering
  5. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Lab. for Electrochemical Interfaces; Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Dept. of Materials Science and Engineering
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Distinct properties of multiple phases of vanadium oxide (VOx) render this material family attractive for advanced electronic devices, catalysis, and energy storage. In this work, phase boundaries of VOx are crossed and distinct electronic properties are obtained by electrochemically tuning the oxygen content of VOx thin films under a wide range of temperatures. Reversible phase transitions between two adjacent VOx phases, VO2 and V2O5, are obtained. Cathodic biases trigger the phase transition from V2O5 to VO2, accompanied by disappearance of the wide band gap. The transformed phase is stable upon removal of the bias while reversible upon reversal of the electrochemical bias. The kinetics of the phase transition is monitored by tracking the time-dependent response of the X-ray absorption peaks upon the application of a sinusoidal electrical bias. The electrochemically controllable phase transition between VO2 and V2O5 demonstrates the ability to induce major changes in the electronic properties of VOx by spanning multiple structural phases. This concept is transferable to other multiphase oxides for electronic, magnetic, or electrochemical applications.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Chemical Sciences, Geosciences & Biosciences Division; National Science Foundation (NSF)
Grant/Contract Number:
AC05-00OR22725; AC02-05CH11231
OSTI ID:
1461946
Journal Information:
Advanced Functional Materials, Journal Name: Advanced Functional Materials Journal Issue: 0 Vol. 0; ISSN 1616-301X
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (11)

Nonstoichiometric Oxygen‐Dependent Microstructures and Phase Transitions in Post‐Annealed Vanadium Dioxides journal April 2019
Degradation Mechanism of Vanadium Oxide Films When Grown on Y‐Stabilized ZrO 2 Above 500 °C journal October 2019
Al‐Doping‐Induced VO 2 (B) Phase in VO 2 (M) Toward Smart Optical Thin Films with Modulated Δ T vis and Δ T c journal October 2019
An Ultrahigh Energy Density Quasi‐Solid‐State Zinc Ion Microbattery with Excellent Flexibility and Thermostability journal August 2019
Strain Induced Orbital Dynamics Across the Metal Insulator Transition in Thin VO2/TiO2 (001) Films journal January 2020
Electrolyte-based ionic control of functional oxides journal December 2018
Thin film oxide-ion conducting electrolyte for near room temperature applications journal January 2019
Regulating phase change behavior and surface characteristics of Sn 15 Sb 85 thin film by oxygen doping journal July 2019
Asymmetric response of electrical conductivity and V valence state to strain in cation-deficient Sr 1– y VO 3 ultrathin films based on absorption measurements at the V L 2 - and L 3 -edges journal July 2019
Self-Assembled Vanadium Oxide Nanoflakes for p-Type Ammonia Sensors at Room Temperature journal February 2019
Strain induced orbital dynamics across the Metal Insulator transition in thin VO2/TiO2(001) films text January 2020

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36 MATERIALS SCIENCE
ambient‐pressure X‐ray photoelectron spectroscopy
phase transitions
vanadium oxides