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

Lung Capacity01:47

Lung Capacity

56.5K
The air in the lungs is measured in volumes and capacities. Lung volume measures reflect the amount of air taken in, released, or left over after a lung function, like a single inhalation. Lung capacity measures are sums of two or more lung volume measures.
56.5K
Respiratory Capacities01:24

Respiratory Capacities

1.5K
Respiratory capacities are crucial indicators of lung function, representing the maximum amount of air an individual's respiratory system can handle during various breathing phases.
One key metric is the Inspiratory Capacity (IC), which represents the maximum amount of air that can be inhaled with full effort. IC is calculated by summing the tidal volume and inspiratory reserve volume, typically ranging from 2.4 to 3.6 liters.
The Functional Residual Capacity (FRC) represents the air in the...
1.5K
Reaction Rate02:53

Reaction Rate

66.1K
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...
66.1K
Related Rates01:18

Related Rates

61
When two or more physical quantities are linked by a single relationship, a change in one variable necessarily affects the others. This interdependence forms the basis of related rates analysis, which examines how different quantities change with respect to time. A classic physical example is an expanding balloon, where the size of the balloon changes continuously as air is added.For a hot air balloon, the inflated envelope is commonly idealized as a perfect sphere to simplify mathematical...
61
Buffers: Buffer Capacity01:09

Buffers: Buffer Capacity

2.5K
Buffer capacity is the quantitative measure of a buffer to resist the change in pH. As shown in the following equation, the buffer capacity, denoted by 'beta', is expressed as the number of moles of acid or base needed to change the pH of a one-liter buffer solution by 1 unit. Here, Ca and Cb indicate the number of moles of acid and base, respectively. Note that dpH represents the change in pH.
In the graph, pH is plotted as a function of the number of moles of base (Cb) added to a weak...
2.5K
Respiratory Volumes and Capacities01:22

Respiratory Volumes and Capacities

5.7K
The respiratory system is responsible for the intake of oxygen and the expulsion of carbon dioxide from the body. Respiratory volumes describe the volume of air in the lungs at different phases of the respiratory cycle. Tidal volume is the air breathed in and out during normal, quiet breathing. Inspiratory reserve volume is the air that can be forcefully inspired beyond the tidal volume. In contrast, expiratory reserve volume refers to the air that can be expelled from the lungs after a normal...
5.7K

You might also read

Related Articles

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

Sort by
Same author

Breaking the Adsorption Seesaw Via Asymmetric Pt-M Sites for PET Electro-Upcycling.

Advanced materials (Deerfield Beach, Fla.)·2026
Same author

High-Spin Pt Sites of Intermetallic Compound via Pinning Effect Boost Oxygen Reduction Performance.

Angewandte Chemie (International ed. in English)·2026
Same author

Microglial activation disrupts hippocampal CA1 sharp-wave ripples via the CA3-CA1 neural circuit that contributes to postoperative memory consolidation deficits in aged mice.

British journal of anaesthesia·2026
Same author

Tree Height Prediction Using a Double Hidden-Layer Neural Network and a Mixed-Effects Model.

Plants (Basel, Switzerland)·2026
Same author

High-Rate Na-Ion Storage Enabled by Metal-Nitrogen-Carbon (M-N-C) Charge Transfer Bridges.

Chemistry, an Asian journal·2026
Same author

Personalized Prediction of prognosis in ebv-associated lymphoepithelioma-like carcinoma: insights from a Chinese cohort study.

BMC cancer·2026

Related Experiment Video

Updated: Feb 14, 2026

An Ultrahigh-throughput Microfluidic Platform for Single-cell Genome Sequencing
10:00

An Ultrahigh-throughput Microfluidic Platform for Single-cell Genome Sequencing

Published on: May 23, 2018

18.4K

Achieving Insertion-Like Capacity at Ultrahigh Rate via Tunable Surface Pseudocapacitance.

Teng Zhai1, Shuo Sun1, Xiaojing Liu2

  • 1School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China.

Advanced Materials (Deerfield Beach, Fla.)
|February 10, 2018
PubMed
Summary

Surface-modified iron oxide quantum dots on graphene enhance energy storage by enabling fast dual-ion reactions. This approach achieves high specific capacity and rapid charge/discharge for advanced supercapacitors.

Keywords:
chemical adsorptiondual ionshematiteoxygen vacanciessupercapacitorsultrahigh rate

More Related Videos

Fabrication of Mechanically Tunable and Bioactive Metal Scaffolds for Biomedical Applications
09:56

Fabrication of Mechanically Tunable and Bioactive Metal Scaffolds for Biomedical Applications

Published on: December 8, 2015

11.2K
Determination of Zeta Potential via Nanoparticle Translocation Velocities through a Tunable Nanopore: Using DNA-modified Particles as an Example
08:42

Determination of Zeta Potential via Nanoparticle Translocation Velocities through a Tunable Nanopore: Using DNA-modified Particles as an Example

Published on: October 26, 2016

12.8K

Related Experiment Videos

Last Updated: Feb 14, 2026

An Ultrahigh-throughput Microfluidic Platform for Single-cell Genome Sequencing
10:00

An Ultrahigh-throughput Microfluidic Platform for Single-cell Genome Sequencing

Published on: May 23, 2018

18.4K
Fabrication of Mechanically Tunable and Bioactive Metal Scaffolds for Biomedical Applications
09:56

Fabrication of Mechanically Tunable and Bioactive Metal Scaffolds for Biomedical Applications

Published on: December 8, 2015

11.2K
Determination of Zeta Potential via Nanoparticle Translocation Velocities through a Tunable Nanopore: Using DNA-modified Particles as an Example
08:42

Determination of Zeta Potential via Nanoparticle Translocation Velocities through a Tunable Nanopore: Using DNA-modified Particles as an Example

Published on: October 26, 2016

12.8K

Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Insertion/deinsertion mechanisms offer high energy density but suffer from slow ion diffusion.
  • Adsorption/desorption mechanisms are faster but have lower energy density.
  • Simultaneously achieving high energy and power density is crucial for ideal energy storage devices.

Purpose of the Study:

  • To develop a novel electrode material for enhanced pseudocapacitance.
  • To improve charge-transport kinetics and energy density in supercapacitors.
  • To investigate the role of surface modification and electrolyte composition on electrochemical performance.

Main Methods:

  • Synthesized surface-modified iron(III) oxide (Fe2O3) quantum dots anchored on graphene nanosheets.
  • Utilized an aqueous sodium sulfite (Na2SO3) electrolyte with oxygen-vacancy-tuned Fe2O3.
  • Constructed an asymmetric supercapacitor using a dual-electrolyte design with Fe2O3 and manganese dioxide (MnO2).

Main Results:

  • Fe2O3-based electrodes exhibited significantly enhanced pseudocapacitance via dual-ion redox reactions.
  • Achieved a high specific capacity of 749 C g-1 at 5 mV s-1, retaining 290 C g-1 at 3.2 V s-1.
  • The asymmetric supercapacitor demonstrated a high energy density of 75 Wh kg-1 at a power density of 3125 W kg-1.

Conclusions:

  • Surface-modified Fe2O3 quantum dots on graphene offer a promising strategy for high-performance supercapacitors.
  • Oxygen-vacancy tuning and dual-ion involvement are key to enhancing surface pseudocapacitance.
  • The developed asymmetric supercapacitor design effectively balances high energy and power density requirements.