Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Redox Reactions01:24

Redox Reactions

58.8K
Oxidation-reduction or redox reactions involve the transfer of electrons from one molecule or atom to another. When an atom gains an electron, another atom must lose an electron, meaning oxidation and reduction must occur together. Since the redox occurs in pairs, the atom that gets oxidized is also called the reducing agent or reductant, and the atom that is reduced is also called the oxidizing agent or oxidant. A straightforward way to remember the definitions of oxidation and reduction is...
58.8K
Redox Reactions01:27

Redox Reactions

1.0K
Redox reactions are vital biochemical processes that underpin energy metabolism in cells. These reactions involve the transfer of electrons between molecules, occurring in tandem as oxidation and reduction. Oxidation refers to the loss of electrons, while reduction denotes their gain. This coupling ensures the seamless flow of electrons through metabolic pathways. For example, in bacterial metabolism, glucose undergoes oxidation to carbon dioxide, while oxygen is simultaneously reduced to...
1.0K
Reaction Rate02:53

Reaction Rate

64.0K
The rate of reaction is the change in the amount of a reactant or product per unit time. Reaction rates are therefore determined by measuring the time dependence of some property that can be related to reactant or product amounts. Rates of reactions that consume or produce gaseous substances, for example, are conveniently determined by measuring changes in volume or pressure.
The mathematical representation of the change in the concentration of reactants and products, over time, is the rate...
64.0K
Measuring Reaction Rates03:09

Measuring Reaction Rates

29.9K
Polarimetry finds application in chemical kinetics to measure the concentration and reaction kinetics of optically active substances during a chemical reaction. Optically active substances have the capability of rotating the plane of polarization of linearly polarized light passing through them—a feature called optical rotation. Optical activity is attributed to the molecular structure of substances. Normal monochromatic light is unpolarized and possesses oscillations of the electrical...
29.9K
Temperature Dependence on Reaction Rate02:55

Temperature Dependence on Reaction Rate

89.1K
The Collision Theory
Atoms, molecules, or ions must collide before they can react with each other. Atoms must be close together to form chemical bonds. This premise is the basis for a theory that explains many observations regarding chemical kinetics, including factors affecting reaction rates.
The collision theory is based on the postulates that (i) the reaction rate is proportional to the rate of reactant collisions, (ii) the reacting species collide in an orientation allowing contact between...
89.1K
Balancing Redox Equations02:58

Balancing Redox Equations

62.2K
Electrochemistry is the science involved in the interconversion of electrical and chemical reactions. Such reactions are called reduction-oxidation, or redox reactions. These important reactions are defined by changes in oxidation states for one or more reactant elements and include a subset of reactions involving the transfer of electrons between reactant species. Electrochemistry as a field has evolved to yield sufficient insights on the fundamental principles of redox chemistry and multiple...
62.2K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Decoding MnO<sub>2</sub> redox chemistry from mechanistic ambiguity to design principles for aqueous Zn-ion batteries.

Nature communications·2026
Same author

Framework Short-Range Order Observed in a Spinel-Type Li Superionic Conductor.

Journal of the American Chemical Society·2026
Same author

Applications of Average Hamiltonian Theory to spin polarization transfer in magnetic resonance.

Solid state nuclear magnetic resonance·2025
Same author

A literature-derived dataset of migration barriers for quantifying ionic transport in battery materials.

Scientific data·2025
Same author

Structural and Dynamical Characterization of Aqueous Hexahydrate Aluminum Nitrate Electrolyte Solution.

The journal of physical chemistry. B·2025
Same author

Exploration of Amorphous V<sub>2</sub>O<sub>5</sub> as Cathode for Magnesium Batteries.

Small (Weinheim an der Bergstrasse, Germany)·2025

Related Experiment Video

Updated: Feb 5, 2026

Simultaneous Multi-surface Anodizations and Stair-like Reverse Biases Detachment of Anodic Aluminum Oxides in Sulfuric and Oxalic Acid Electrolyte
10:27

Simultaneous Multi-surface Anodizations and Stair-like Reverse Biases Detachment of Anodic Aluminum Oxides in Sulfuric and Oxalic Acid Electrolyte

Published on: October 5, 2017

7.7K

Realizing Highly Reversible Nb5+/Nb4+/Nb3+ Redox Reactions in Bulk NASICON-NaNbAl(PO4)3 Anode Under Higher Current

Ayon Phukan1, Biplab Patra1, Tanushree Acharya2

  • 1New Chemistry Unit, International Centre for Materials Science, and School of Advanced Materials, Jawaharlal Nehru Centre For Advanced Scientific Research, Bangalore, Karnataka, India.

Small (Weinheim an Der Bergstrasse, Germany)
|February 4, 2026
PubMed
Summary

Al-substituted NASICON anodes (NaNbAl) enable highly reversible Nb redox reactions for sodium-ion batteries. This stabilized structure improves cycling stability and fast ion transport, paving the way for advanced energy storage.

Keywords:
NASICON anodeNaNbAl(PO4)3multi‐redox activityreversible Nb5+/Nb4+/Nb3+sodium‐ion battery

More Related Videos

Determining Tribocorrosion Rate and Wear-Corrosion Synergy of Bulk and Thin Film Aluminum Alloys
07:12

Determining Tribocorrosion Rate and Wear-Corrosion Synergy of Bulk and Thin Film Aluminum Alloys

Published on: September 11, 2018

11.9K
The Effect of Anodization Parameters on the Aluminum Oxide Dielectric Layer of Thin-Film Transistors
12:32

The Effect of Anodization Parameters on the Aluminum Oxide Dielectric Layer of Thin-Film Transistors

Published on: May 24, 2020

9.2K

Related Experiment Videos

Last Updated: Feb 5, 2026

Simultaneous Multi-surface Anodizations and Stair-like Reverse Biases Detachment of Anodic Aluminum Oxides in Sulfuric and Oxalic Acid Electrolyte
10:27

Simultaneous Multi-surface Anodizations and Stair-like Reverse Biases Detachment of Anodic Aluminum Oxides in Sulfuric and Oxalic Acid Electrolyte

Published on: October 5, 2017

7.7K
Determining Tribocorrosion Rate and Wear-Corrosion Synergy of Bulk and Thin Film Aluminum Alloys
07:12

Determining Tribocorrosion Rate and Wear-Corrosion Synergy of Bulk and Thin Film Aluminum Alloys

Published on: September 11, 2018

11.9K
The Effect of Anodization Parameters on the Aluminum Oxide Dielectric Layer of Thin-Film Transistors
12:32

The Effect of Anodization Parameters on the Aluminum Oxide Dielectric Layer of Thin-Film Transistors

Published on: May 24, 2020

9.2K

Area of Science:

  • Materials Science
  • Electrochemistry
  • Solid-state Chemistry

Background:

  • Sodium-ion batteries (SIBs) are promising for large-scale energy storage.
  • NASICON-type materials, specifically Nb2(PO4)3, show potential as SIB anodes due to high theoretical capacity from Nb redox.
  • Structural degradation limits the reversibility of Nb redox reactions in traditional NASICON anodes.

Purpose of the Study:

  • To develop a NASICON anode with enhanced structural stability and reversible Nb redox reactions for SIBs.
  • To investigate the role of Al substitution in stabilizing the NASICON framework and facilitating Na+ (de)intercalation.
  • To evaluate the electrochemical performance and ion transport properties of the novel NaNbAl anode.

Main Methods:

  • Density functional theory (DFT)-based calculations to understand redox mechanisms and ion migration barriers.
  • Synthesis and characterization of bulk NASICON-NaNbAl(PO4)3 (NaNbAl) anode material.
  • Electrochemical testing, including cycling performance, rate capability, and operando synchrotron X-ray diffraction (XRD).

Main Results:

  • Al substitution in NaNbAl stabilizes the NASICON framework, enabling reversible Nb5+/Nb4+/Nb3+ redox reactions.
  • The NaNbAl anode exhibits a capacity of 90 mAh g-1 at 5C with 86% capacity retention after 1000 cycles.
  • Operando XRD and DFT calculations confirm rapid Na+ (de)intercalation and low migration barriers in the NaNbAl structure.
  • A full SIB cell (Na4V2(PO4)3||NaNbAl) demonstrates an energy density of 201 Wh kg-1 (cathode mass) with 84% capacity retention over 200 cycles at 1C.

Conclusions:

  • Al-substituted NASICON (NaNbAl) is a highly reversible anode material for sodium-ion batteries.
  • The stabilized framework and facilitated ion diffusion enable robust cycling performance and high rate capability.
  • This work presents a viable strategy for designing advanced NASICON anodes leveraging reversible multi-electron redox couples.