Related Experiment Video
Updated: Jul 21, 2025
06:58
Zinc-Sponge Battery Electrodes that Suppress Dendrites
Published on: September 29, 2020
4.4K
3D Framework Carbon for High-Performance Zinc-Ion Capacitors.
Setthathon Kiatikajornjumroen1, Xiaopeng Liu1, Yinan Lu1
1Institute for Materials Discovery (IMD), University College London (UCL), London WC1E 7JE, UK.
Micromachines
|July 29, 2023
Summary
Researchers developed a novel 3D porous carbon cathode for zinc-ion capacitors (ZICs). This advancement significantly enhances cycling stability and durability, paving the way for safer, high-performance energy storage solutions.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Growing demand for safe, non-flammable energy storage drives interest in aqueous capacitors.
- Zinc-ion capacitors (ZICs) are promising but limited by poor cycling stability and low energy density.
- Current research focuses on zinc anodes and carbonaceous cathodes.
Purpose of the Study:
- To address the limitations of current zinc-ion capacitors (ZICs).
- To develop a high-performance cathode material for enhanced ZIC stability and durability.
- To investigate a novel three-dimensional (3D) conductive porous carbon framework cathode.
Main Methods:
- Fabrication of a three-dimensional (3D) conductive porous carbon framework cathode.
- Assembly of zinc anode and carbon framework cathode cells for ZIC testing.
- Evaluation of electrochemical performance, including cycling stability and coulombic efficiency.
Main Results:
- The novel 3D carbon framework cathode demonstrated exceptional stability and durability in ZICs.
- Achieved remarkable cycling performance with approximately 97.3% capacity retention after 10,000 cycles.
- Maintained nearly 100% coulombic efficiency over 10,000 charge-discharge cycles.
Conclusions:
- The developed 3D conductive porous carbon framework cathode significantly improves ZIC performance.
- This approach offers a viable strategy to overcome stability and durability challenges in ZICs.
- Represents substantial progress towards practical, high-performance aqueous energy storage devices.
Related Concept Videos
01:18Capacitor With A Dielectric
4.0K
Parallel plate capacitors consist of two conducting plates separated by a certain distance. However, it is mechanically difficult to hold the large plates parallel to each other without actual contact. Hence, a dielectric layer is commonly placed between the plates, which provides an easy solution for holding the plates together with a small gap and increases the capacitance of the capacitor.
Dielectrics are non-conducting materials with no free or loosely bound electrons. When a dielectric is...
Dielectrics are non-conducting materials with no free or loosely bound electrons. When a dielectric is...
4.0K
01:26Spherical and Cylindrical Capacitor
5.8K
A spherical capacitor consists of two concentric conducting spherical shells of radii R1 (inner shell) and R2 (outer shell). The shells have equal and opposite charges of +Q and −Q, respectively. For an isolated conducting spherical capacitor, the radius of the outer shell can be considered to be infinite.
Conventionally, considering the symmetry, the electric field between the concentric shells of a spherical capacitor is directed radially outward. The magnitude of the field,...
Conventionally, considering the symmetry, the electric field between the concentric shells of a spherical capacitor is directed radially outward. The magnitude of the field,...
5.8K
01:31Dielectric Polarization in a Capacitor
4.8K
The presence of a dielectric medium in a capacitor not only changes the voltage and capacitance but also affects the electric field. In general, dielectrics can be of two types: polar and nonpolar. In a polar dielectric, the positive and negative charges in the molecules are separated by a distance and hence have a permanent dipole moment. In contrast, no such charge separation exists in a nonpolar dielectric, however the nonpolar molecules get polarized in the presence of an external electric...
4.8K
01:10Energy Stored in Capacitors
533
A parallel plate capacitor, when connected to a battery, develops a potential difference across its plates. This potential difference is key to the operation of the capacitor, as it determines how much electrical energy the capacitor can store.
By integrating the equation that relates voltage and current in a capacitor, one can derive an equation for the voltage across the capacitor at any given time. This equation is crucial in understanding and predicting the behavior of capacitors in...
By integrating the equation that relates voltage and current in a capacitor, one can derive an equation for the voltage across the capacitor at any given time. This equation is crucial in understanding and predicting the behavior of capacitors in...
533
01:12Energy Stored in a Capacitor
3.7K
When an archer pulls the string in a bow, he saves the work done in the form of elastic potential energy. When he releases the string, the potential energy is released as kinetic energy of the arrow. A capacitor works on the same principle in which the work done is saved as electric potential energy. The potential energy (UC) could be calculated by measuring the work done (W) to charge the capacitor.
3.7K
01:25MOS Capacitor
839
A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
839