Related Experiment Video
Updated: Dec 19, 2025
08:07
Assembly and Characterization of Biomolecular Memristors Consisting of Ion Channel-doped Lipid Membranes
Published on: March 9, 2019
8.2K
Electrolyte Membranes with Biomimetic Lithium-Ion Channels
Wenyue Shi1, Jianqiang Shen1, Li Shen1
1Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, California 90095, United States.
Nano Letters
|June 4, 2020
Summary
Chemically modifying metal-organic frameworks (MOFs) with sulfonate groups creates selective lithium-ion channels. This design enhances lithium-ion battery performance by improving ion transport and durability.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- High-performance lithium-ion batteries (LIBs) require efficient and selective lithium-ion transport.
- Current LIB technology faces challenges in ion selectivity and transport efficiency.
Purpose of the Study:
- To design and implement ion-selective materials for enhanced lithium-ion battery performance.
- To mimic biological ion channels using modified metal-organic frameworks (MOFs).
Main Methods:
- Chemically modifying nanoporous metal-organic frameworks (MOFs) with negatively charged sulfonate groups.
- Constructing artificial lithium-ion channels within the MOF structure.
Main Results:
- The modified MOFs exhibit selective cation transport, repelling anions.
- Implementation as electrolyte membranes significantly enhanced the lithium-ion transference number.
- Reduced concentration polarization and improved durability for high-rate LIBs were observed.
Conclusions:
- This ion-selective material design effectively tunes ion transport behavior.
- The developed MOF-based channels offer a promising strategy for more efficient LIB operation.
Related Concept Videos
01:15Potentiometry: Membrane Electrodes
1.4K
Membrane electrodes, also known as p-ion electrodes, use membranes that selectively interact with free analyte ions, generating a potential difference across the membrane. The resulting membrane potential, known as the asymmetry potential, is not zero even when analyte concentrations on both sides of the membrane are equal. The membrane's response is typically not selective to a single analyte but proportional to the concentration of all ions in the sample solution capable of interacting at...
1.4K
01:21Electrochemical Gradient and Channel Proteins: An Overview
4.1K
An electrochemical gradient is a fundamental concept in biology and chemistry. It regulates the movement of ions across cell membranes. This movement is influenced by two factors:
The electrical gradient: The electrical gradient across cell membranes refers to the difference in electric charge between the inside and outside of a cell. This difference drives the movement of ions towards or away from the cells. For instance, if the inside of the cell is more negatively charged relative to...
The electrical gradient: The electrical gradient across cell membranes refers to the difference in electric charge between the inside and outside of a cell. This difference drives the movement of ions towards or away from the cells. For instance, if the inside of the cell is more negatively charged relative to...
4.1K
01:19Ion Channels
90.8K
The movement of ions like sodium, potassium, and calcium into and out of the cell is essential to maintain the electrochemical gradient in living cells. The ion channels—a class of membrane transport proteins—help maintain this ionic gradient for the smooth functioning of physiological activities such as maintaining cell size and volume, conducting nerve impulses, and gas and nutrient exchange.
Ion channels are specialized integral membrane proteins on the plasma membrane that allow...
Ion channels are specialized integral membrane proteins on the plasma membrane that allow...
90.8K
01:19Ligand-gated Ion Channels
13.8K
Ligand-gated ion channels are transmembrane proteins with a channel for ions to pass through and a binding site for a ligand. The channel opens only when a ligand attaches to the binding site.
Three Subfamilies of Ligand-gated Ion Channels
Ligand-gated ion channels fall into three subfamilies. The 'Cys-loop' includes the nicotinic acetylcholine receptors, γ-aminobutyric acid (GABA), glycine, and 5-hydroxytryptamine receptors. The second one is the 'Pore-loop' channels that...
Three Subfamilies of Ligand-gated Ion Channels
Ligand-gated ion channels fall into three subfamilies. The 'Cys-loop' includes the nicotinic acetylcholine receptors, γ-aminobutyric acid (GABA), glycine, and 5-hydroxytryptamine receptors. The second one is the 'Pore-loop' channels that...
13.8K
01:26Voltage-gated Ion Channels
10.0K
Voltage-gated ion channels are transmembrane proteins that open and close in response to changes in the membrane potential. They are present on the membranes of all electrically excitable cells such as neurons, heart, and muscle cells.
Generally, all voltage-gated ion channels have a 'voltage-sensing domain' that spans the lipid bilayer. The charged residues in the sensor move in response to the membrane potential changes that open the channel allowing ions movement. There are several...
Generally, all voltage-gated ion channels have a 'voltage-sensing domain' that spans the lipid bilayer. The charged residues in the sensor move in response to the membrane potential changes that open the channel allowing ions movement. There are several...
10.0K
01:21The Resting Membrane Potential
141.0K
Overview
141.0K