Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

P-N junction

P-N junction

A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...

You might also read

Related Articles

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

Sort by

Same author

Noninvasive SERS Immunosensing of Tyrosinase for Melanoma Monitoring via Microneedle Sampling Integrated with Satellite-Structured Bifunctional Nanozymes.

Analytical chemistry·2026

Same author

Macrophages dynamically integrate neuro-immune-microbial network signals: their role in gastrointestinal motility disorders and targeting potential.

Frontiers in immunology·2026

Same author

Ambient Cationic Activation-Radical Synergy Yields High-Performance Polymer Electrolytes.

ACS applied materials & interfaces·2026

Same author

Research Progress in the Evaluation of Thermal Shock Resistance of Refractories: From Theoretical Evolution to Intelligent Characterization.

Materials (Basel, Switzerland)·2026

Same author

Mechano-Electrochemical Coupling Enabled by Triple-Gradient Interface Engineered Garnet for Durable All-Solid-State Lithium Metal Batteries.

Small (Weinheim an der Bergstrasse, Germany)·2026

Same author

Hydroxyalkylation of α-Silylamines via a Photoredox Polarity-Matched Strategy.

Organic letters·2026

Search research articles

Related Experiment Video

Updated: Sep 11, 2025

Ambient Method for the Production of an Ionically Gated Carbon Nanotube Common Cathode in Tandem Organic Solar Cells

Ambient Method for the Production of an Ionically Gated Carbon Nanotube Common Cathode in Tandem Organic Solar Cells

Published on: November 5, 2014

Superstructure Engineering Enables NASICON-Type Phosphate Cathodes with Increased Working Voltage and Energy Density.

Enhui Wang^1,2, Chunliu Xu^2,3, Mingzhe Chen²

¹College of Chemistry, Zhengzhou University, Zhengzhou, 450001, China.

Advanced Materials (Deerfield Beach, Fla.)

|August 19, 2025

Summary

Superstructure engineering enhances iron-based phosphate cathodes for sodium-ion batteries (SIBs). This modification boosts the working voltage and energy density of NASICON-type materials, paving the way for improved battery performance.

Keywords:

NASICON frameworks Na3VFe(PO4)3 high energy density sodium‐ion batteries superstructures

More Related Videos

Construction and Testing of Coin Cells of Lithium Ion Batteries

Construction and Testing of Coin Cells of Lithium Ion Batteries

Published on: August 2, 2012

Harvesting Solar Energy by Means of Charge-Separating Nanocrystals and Their Solids

Harvesting Solar Energy by Means of Charge-Separating Nanocrystals and Their Solids

Published on: August 23, 2012

Related Experiment Videos

Last Updated: Sep 11, 2025

Ambient Method for the Production of an Ionically Gated Carbon Nanotube Common Cathode in Tandem Organic Solar Cells

Ambient Method for the Production of an Ionically Gated Carbon Nanotube Common Cathode in Tandem Organic Solar Cells

Published on: November 5, 2014

Construction and Testing of Coin Cells of Lithium Ion Batteries

Construction and Testing of Coin Cells of Lithium Ion Batteries

Published on: August 2, 2012

Harvesting Solar Energy by Means of Charge-Separating Nanocrystals and Their Solids

Harvesting Solar Energy by Means of Charge-Separating Nanocrystals and Their Solids

Published on: August 23, 2012

Area of Science:

Materials Science
Electrochemistry
Solid-State Chemistry

Background:

NASICON-type iron-based phosphates are promising for sodium-ion batteries (SIBs) due to cost and rate capability.
Strong Fe─O bonds limit their energy density by lowering the Fe2+/Fe3+ redox potential below 2.5 V.
Achieving higher energy density requires strategies to increase the working voltage of these phosphate cathodes.

Purpose of the Study:

To enhance the ionic characteristics of Fe─O bonds and increase the working voltage of Fe2+/Fe3+ redox couples in NASICON-type iron-based phosphates.
To investigate the effect of superstructure engineering on the electrochemical performance of these cathode materials.
To demonstrate a method for improving the energy density of phosphate cathodes for SIBs.

Main Methods:

Superstructure engineering was employed by manipulating calcination temperature during synthesis.
Advanced structural characterization techniques were used to analyze the material structure.
Theoretical calculations were performed to understand the electronic structure and ion migration.

Main Results:

Fe3+ ion migration to Na+ vacancies created Fe/Na_v superstructure ordering.
Fe delocalization and electronic structure rearrangement led to an enlarged energy gap.
The Na3VFe(PO4)3 cathode with Fe/Na_v superlattice structure showed increased Fe2+/Fe3+ redox potential (2.82 V) and energy density (350 W h kg-1).

Conclusions:

Superstructure engineering is an effective strategy to increase the working voltage and energy density of NASICON-type iron-based phosphate cathodes.
The Fe/Na_v superlattice structure improves the electrochemical performance of these materials for SIB applications.
This research provides a pathway for developing high-performance phosphate cathodes for next-generation sodium-ion batteries.