Related Experiment Video
Updated: Jan 27, 2026
06:32
Dynamic Multiparameter Platelet Function Assessment Using a Capacitive Biosensor
Published on: May 2, 2025
784
Exploring the Capacitive Behavior of Carbon Functionalized with Cyclic Ethers: A Rational Strategy To Exploit Oxygen
ACS Applied Materials & Interfaces
|March 23, 2019
Summary
Cyclic ether groups (CEGs) on carbon electrodes enhance electric double-layer capacitor (EDLC) performance by boosting capacitance while minimizing conductivity loss and ion transport issues common with other oxygen functional groups (OFGs). This breakthrough relies on preserving the carbon
Area of Science:
- Materials Science
- Electrochemistry
- Surface Chemistry
Background:
- Oxygen functional groups (OFGs) on carbon surfaces present challenges in electric double-layer capacitors (EDLCs), including reduced conductivity, ion migration hindrance, and self-discharge.
- Conventional OFGs often negatively impact EDLC performance despite their potential to increase capacitance.
Purpose of the Study:
- To investigate cyclic ether groups (CEGs) as a novel surface functionalization strategy for carbon electrodes in EDLCs.
- To address the limitations of traditional OFGs in EDLC applications.
Main Methods:
- Selective functionalization of carbon surfaces with CEGs.
- In-depth spectroscopic and electrochemical analyses of the modified carbon electrodes.
Main Results:
- In-plane CEGs significantly improve EDLC performance compared to out-of-plane OFGs.
- CEGs boost capacitance through pseudocapacitance while mitigating negative effects like conductivity loss and self-discharge.
- Preserving the sp² carbon network during functionalization is critical for maximizing benefits.
Conclusions:
- CEGs offer a promising approach to enhance EDLC performance by overcoming the drawbacks of conventional OFGs.
- Surface engineering strategies that preserve π-conjugation are essential for developing advanced carbon materials for energy storage.
Related Concept Videos
01:18Capacitors and Capacitance
9.2K
A device consisting of two electrical conductors that are separated by a distance and used to store electrical charges is called a capacitor. The space between the conductors is either a vacuum or an insulating material, called a dielectric. Capacitors have many applications, ranging from filtering static from radio reception to energy storage in heart defibrillators.
When the conductors are two identical parallel plates, it is called a parallel plate capacitor. When battery terminals are...
When the conductors are two identical parallel plates, it is called a parallel plate capacitor. When battery terminals are...
9.2K
01:19Equivalent Capacitance
2.1K
Multiple capacitors can be connected in a circuit in series or parallel configuration. When the capacitor combination is connected to a battery, the potential drop across each capacitor and the magnitude of charge stored in the individual capacitor depends on the type of the connection. The capacitor combination is replaced by a single equivalent capacitor that stores the same amount of charge as the combination for a given potential difference.
The following strategies are adopted to calculate...
The following strategies are adopted to calculate...
2.1K
01:19Equivalent Capacitance
689
From the study of resistive circuits, it is understood that employing a series-parallel combination serves as an effective strategy for simplifying circuits. Capacitors can be arranged within a circuit in one of two ways: a series configuration or a parallel configuration. The way these capacitors are connected to a battery will influence both the potential drop across each individual capacitor and the size of the charge that each capacitor can store. This is determined by the specific type of...
689
01:25Capacitance: Single-Phase And Three-Phase Line
593
In electrical power systems, understanding the capacitance of transmission lines is fundamental for efficient operation.
Single-Phase Lines
Consider a single-phase, two-wire transmission line with equal phase spacing energized by a voltage source. One conductor carries a uniform positive charge, while the other carries an equal negative charge. The capacitance C of the line can be derived from the voltage V between the conductors. For a one-meter section of the line, the capacitance is given...
Single-Phase Lines
Consider a single-phase, two-wire transmission line with equal phase spacing energized by a voltage source. One conductor carries a uniform positive charge, while the other carries an equal negative charge. The capacitance C of the line can be derived from the voltage V between the conductors. For a one-meter section of the line, the capacitance is given...
593
01:20Design Example: Capacitance Multiplier Circuit
1.5K
In integrated circuit technology, a capacitance multiplier is often utilized to produce a larger capacitance value when a small physical capacitance falls short. This is achieved by a circuit that multiplies capacitance values by a factor of up to 1000, such that a 10-pF capacitor can replicate the performance of a 100-nF capacitor.
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.
1.5K
02:45Functional Groups
88.2K
Functional groups are a group of atoms with characteristic properties, which when linked to the carbon skeleton of a molecule, alter the properties of that molecule. For example, the presence of certain functional groups on a molecule will make them hydrophilic, whereas others will make them hydrophobic. These functional groups are an indispensable part of organic chemistry and important components of biological molecules, such as carbohydrates, proteins, lipids, and nucleic acids. Each...
88.2K