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

The Nucleosome Core Particle02:10

The Nucleosome Core Particle

14.6K
Nucleosomes are the DNA-histone complex, where the DNA strand is wound around the histone core. The histone core is an octamer containing two copies of H2A, H2B, H3, and H4 histone proteins.
The paradox
Nucleosomes, paradoxically, perform two opposite functions simultaneously. On the one hand, their main responsibility is to protect the delicate DNA strands from physical damage and help achieve a higher compaction ratio. While on the other hand, they must allow polymerase enzymes to access DNA...
14.6K
The Nucleosome Core Particle01:12

The Nucleosome Core Particle

2.5K
Nucleosomes are the DNA-histone complex, where the DNA strand is wound around the histone core. The histone core is an octamer containing two copies of H2A, H2B, H3, and H4 histone proteins.
Nucleosomes, paradoxically, perform two opposite functions simultaneously. On the one hand, their primary aim is to protect the delicate DNA strands from physical damage and help achieve a higher compaction ratio. On the other hand, they must allow polymerase enzymes to access histone-bound DNA during...
2.5K
Classifying Matter by Composition03:35

Classifying Matter by Composition

91.9K
Matter: Pure Substances and Mixtures
According to its composition, the matter can be classified into two broad categories — pure substances and mixtures. 
A pure substance is a form of matter that has a constant composition throughout with uniform properties. For example, any sample of sucrose has the same composition and same physical properties, such as melting point, color, and sweetness, regardless of the source from which it is isolated. 
A mixture is composed of two or...
91.9K
Standard Electrode Potentials03:02

Standard Electrode Potentials

50.6K
On comparing the reactivity of silver and lead, it is observed that the two ionic species, Ag+ (aq) and Pb2+ (aq), show a difference in their redox reactivity towards copper: the silver ion undergoes spontaneous reduction, while the lead ion does not. This relative redox activity can be easily quantified in electrochemical cells by a property called cell potential. This property is commonly known as cell voltage in electrochemistry, and it is a measure of the energy which accompanies the charge...
50.6K
Classification of Skeletal Muscle Fibers01:48

Classification of Skeletal Muscle Fibers

59.6K
Skeletal muscles continuously produce ATP to provide the energy that enables muscle contractions. Skeletal muscle fibers can be categorized into three types based on differences in their contraction speed and how they produce ATP, as well as physical differences related to these factors. Most human muscles contain all three muscle fiber types, albeit in varying proportions.
Slow-Twitch Muscle Fibers
Slow oxidative, muscle fibers appear red due to large numbers of capillaries and high levels of...
59.6K
Composite Bodies00:55

Composite Bodies

1.4K
A composite body is a body made up of multiple parts, connected to form a larger, unified object. Each part has its own weight and center of gravity, which must be considered to determine the center of gravity of the composite body. In cases where the density or specific weight is constant, the center of gravity coincides with the centroid.
Composite bodies have widespread applications in mechanical engineering, from automobiles to aircraft to rockets. For example, an automobile wheel comprises...
1.4K

You might also read

Related Articles

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

Sort by
Same author

Synergistic Solvent-Surface Interactions Enable Alkyne Semihydrogenation at Palladium.

ACS applied materials & interfaces·2026
Same author

CuO/Cu(OH)<sub>2</sub> Heterostructure with Sustained Dynamic Re-equilibration and High HER Activity.

ACS applied materials & interfaces·2026
Same author

Contact-Accessible Silver Nanoparticle-Decorated Electrospun Carbon Fibers for Microplastics Detection by SERS.

Materials (Basel, Switzerland)·2026
Same author

Electrospun nanofiber composite for stable and scalable VO<sub>2</sub>-based thermochromic smart windows: energy and environmental analysis.

Nanoscale·2026
Same author

A perspective of emerging trends in integrated PFAS detection and remediation technologies with data driven approaches.

Chemical science·2025
Same author

Rapid Isolation and Characterization of Exosomes through a Single-Step, Label-Free Protein Biomarker Analysis.

ACS applied bio materials·2025

Related Experiment Video

Updated: Feb 16, 2026

Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System
12:00

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

Published on: January 7, 2022

14.9K

Core-Shell Composite Fibers for High-Performance Flexible Supercapacitor Electrodes.

Xiaoyan Lu1, Chen Shen1, Zeyang Zhang1

  • 1NanoScience Technology Center, University of Central Florida , Orlando, Florida 32826, United States.

ACS Applied Materials & Interfaces
|January 4, 2018
PubMed
Summary

Core-shell nanofibers with manganese dioxide and polypyrrole were developed for supercapacitors. These advanced materials offer high capacity and stable performance, demonstrating significant potential for energy storage applications.

Keywords:
MnO2core−shell nanofiberflexible supercapacitor electrodespolyelectrolytepolypyrrole

More Related Videos

Experimental Implementation of a New Composite Fabrication Method: Exposing Bare Fibers on the Composite Surface by the Soft Layer Method
06:26

Experimental Implementation of a New Composite Fabrication Method: Exposing Bare Fibers on the Composite Surface by the Soft Layer Method

Published on: October 6, 2017

8.8K
Scalable Solution-processed Fabrication Strategy for High-performance, Flexible, Transparent Electrodes with Embedded Metal Mesh
11:09

Scalable Solution-processed Fabrication Strategy for High-performance, Flexible, Transparent Electrodes with Embedded Metal Mesh

Published on: June 23, 2017

10.7K

Related Experiment Videos

Last Updated: Feb 16, 2026

Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System
12:00

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

Published on: January 7, 2022

14.9K
Experimental Implementation of a New Composite Fabrication Method: Exposing Bare Fibers on the Composite Surface by the Soft Layer Method
06:26

Experimental Implementation of a New Composite Fabrication Method: Exposing Bare Fibers on the Composite Surface by the Soft Layer Method

Published on: October 6, 2017

8.8K
Scalable Solution-processed Fabrication Strategy for High-performance, Flexible, Transparent Electrodes with Embedded Metal Mesh
11:09

Scalable Solution-processed Fabrication Strategy for High-performance, Flexible, Transparent Electrodes with Embedded Metal Mesh

Published on: June 23, 2017

10.7K

Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Supercapacitors require advanced electrode materials for improved energy storage.
  • Developing stable and high-capacity materials is crucial for next-generation energy devices.

Purpose of the Study:

  • To fabricate and characterize novel core-shell nanofibers for supercapacitor applications.
  • To investigate the electrochemical performance of manganese dioxide@poly(acrylic acid)/polypyrrole (MnO2@PAA/PPy) composite fibers.

Main Methods:

  • Electrospinning of poly(acrylic acid) and manganese ions.
  • Stabilization using Fe3+ ions and oxidation to MnO2 nanoparticles.
  • Formation of a polypyrrole shell via in-situ polymerization.

Main Results:

  • Successfully synthesized MnO2@PAA/PPy core-shell composite nanofibers.
  • Achieved high gravimetric specific capacities of 564 F/g (CV) and 580 F/g (GCD).
  • Demonstrated excellent cycling stability with 100% capacitance retention after 5000 cycles.

Conclusions:

  • The unique core-shell structure enhances the electrochemical performance of supercapacitors.
  • MnO2 nanoparticles provide high capacity, while the PPy shell ensures structural integrity.
  • These composite fibers are promising electrode materials for efficient and durable energy storage.