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

Ferromagnetism01:31

Ferromagnetism

2.3K
Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
2.3K
Paramagnetism01:30

Paramagnetism

2.5K
Paramagnets are materials with unpaired electrons that possess a finite magnetic moment. In the absence of a magnetic field, these moments are randomly oriented, and thus the net moment is zero. Under an external field, a torque acting on the moments tends to align them along the field's direction. However, the random thermal motion of electrons produces a torque opposite to the external field and tries to disorient the moments. These two competing effects align only a few moments along the...
2.5K
Colors and Magnetism03:02

Colors and Magnetism

11.3K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
11.3K
Atomic Nuclei: Nuclear Relaxation Processes01:23

Atomic Nuclei: Nuclear Relaxation Processes

581
In the absence of an external magnetic field, nuclear spin states are degenerate and randomly oriented. When a magnetic field is applied, the spins begin to precess and orient themselves along (lower energy) or against (higher energy) the direction of the field. At equilibrium, a slight excess population of spins exists in the lower energy state. Because the direction of the magnetic field is fixed as the z-axis,  the precessing magnetic moments are randomly oriented around the z-axis.
581
Complexation Equilibria: Factors Influencing Stability of Complexes01:09

Complexation Equilibria: Factors Influencing Stability of Complexes

299
In complexation reactions, metal cations are the electron pair acceptors, and the ligands are the electron pair donors. The stability of the metal complexes depends primarily on the complexing ability of the central metal ion and the nature of the ligands. Generally, the complexing ability of the metal ion depends on the size and charge of the ion. As the metal ion size increases, the stability of the metal complexes decreases, provided that the valency of the metal ion and the ligands remain...
299
Valence Bond Theory02:42

Valence Bond Theory

8.3K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
8.3K

You might also read

Related Articles

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

Sort by
Same author

Metabolomic analysis and functional validation of coumarin metabolites in Chinese cabbage's defense responses against Alternaria brassicae.

Plant science : an international journal of experimental plant biology·2026
Same author

Temporal trends of atrial fibrillation and atrial flutter burden across the BRICS: An observational study analysis for the GBD 2021.

Medicine·2026
Same author

Brucea javanica oil emulsion ameliorates ulcerative colitis by upregulating Deoxyribonuclease 2 to suppress cytosolic DNA-sensing signaling.

Phytomedicine : international journal of phytotherapy and phytopharmacology·2026
Same author

Machine learning based prediction of mechanical properties in carbon fiber recovered through pyrolysis.

Waste management (New York, N.Y.)·2026
Same author

Underwater ultra-slim endoscopy for radiation-free intestinal stenting: overcoming difficult strictures.

Endoscopy·2025
Same author

Faucicola mancuniensis isolated from human respiratory tract and its genomic characteristicstics.

BMC microbiology·2025

Related Experiment Video

Updated: May 12, 2025

Stable Aqueous Suspensions of Manganese Ferrite Clusters with Tunable Nanoscale Dimension and Composition
10:45

Stable Aqueous Suspensions of Manganese Ferrite Clusters with Tunable Nanoscale Dimension and Composition

Published on: February 5, 2022

4.2K

Stabilizing high-rate potassium storage by ferromagnetism.

Ji Ma1, Yangzhan Xu2, Yunliang Xu2

  • 1Laboratory of Advanced Low-dimensional Materials, School of Opto-Electronic Engineering, Zaozhuang University, Zaozhuang 277160, China.

Journal of Colloid and Interface Science
|April 24, 2025
PubMed
Summary
This summary is machine-generated.

Pre-magnetized epsilon iron oxide (ε-Fe₂O₃) exhibits enhanced potassium storage by leveraging ferromagnetism. This synergy improves cycling stability and suppresses side reactions, offering a new avenue for battery material design.

Keywords:
Cycling stabilityFerromagnetismHigh ratePotassium storage

More Related Videos

Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
06:53

Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks

Published on: June 9, 2023

1.9K
Synthesis of Cationized Magnetoferritin for Ultra-fast Magnetization of Cells
10:23

Synthesis of Cationized Magnetoferritin for Ultra-fast Magnetization of Cells

Published on: December 13, 2016

9.9K

Related Experiment Videos

Last Updated: May 12, 2025

Stable Aqueous Suspensions of Manganese Ferrite Clusters with Tunable Nanoscale Dimension and Composition
10:45

Stable Aqueous Suspensions of Manganese Ferrite Clusters with Tunable Nanoscale Dimension and Composition

Published on: February 5, 2022

4.2K
Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
06:53

Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks

Published on: June 9, 2023

1.9K
Synthesis of Cationized Magnetoferritin for Ultra-fast Magnetization of Cells
10:23

Synthesis of Cationized Magnetoferritin for Ultra-fast Magnetization of Cells

Published on: December 13, 2016

9.9K

Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Electrode materials for potassium-ion batteries face challenges with conversion reactions and cycling stability.
  • Understanding the interplay between material properties and electrochemical performance is crucial for developing advanced energy storage solutions.

Purpose of the Study:

  • To investigate the synergetic effect between ferromagnetism and electrochemical performance in pre-magnetized epsilon iron oxide (ε-Fe₂O₃) for potassium storage.
  • To elucidate the mechanisms behind improved cycling stability and electrolyte management in ε-Fe₂O₃ electrodes.

Main Methods:

  • Utilized pre-magnetized ε-Fe₂O₃ as a prototype electrode material.
  • Analyzed high-rate potassiation processes and the resulting phase transformations.
  • Investigated magnetic decantation and its impact on phase separation and side reactions.

Main Results:

  • Observed "potassiation retardation" at high rates, leading to incomplete conversion.
  • Demonstrated magnetic decantation of Fe and K₂O phases, suppressing KOH generation and side reactions.
  • Achieved excellent cycling stability for ε-Fe₂O₃ in potassium storage (0.094‰ capacity loss per cycle over 700 cycles) with >99.9% Coulombic efficiency.
  • Highlighted a greater rate influence on potassium storage compared to lithium storage.

Conclusions:

  • The synergetic effect between ferromagnetism and electrochemical properties in ε-Fe₂O₃ significantly enhances potassium storage performance.
  • Magnetic decantation is a key mechanism for stabilizing the electrode-electrolyte interface and improving cycling life.
  • This study provides new insights into the physicochemical properties of electrode materials for potassium-ion batteries.