调节导电V2O5水凝阴极中的额外层离子通道
Yuchen Jiang1, Yan Wang2, Ruixuan Yang3
1Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, School of New Energy and Electrical Engineering, Hubei University, Wuhan, 430062, P. R. China.
Small methods
|April 24, 2025
概括
工程师通过在氧化瓦纳水凝中创建额外的离子通道,为水性电池开发了新的正极材料. 这一战略提高了先进的储能解决方案的能源和功率密度.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 纳米技术纳米技术
背景情况:
- 高功率的储能器件需要高效的离子和电子传输.
- 水性电池 (AZIB) 对储能具有前景,但在阴极材料性能方面面临挑战.
研究的目的:
- 为AZIBs设计高功率和能量密度的阴极材料.
- 开发一种策略,在氧化瓦纳 (V2O5) 水凝阴极中创建额外层离子通道.
主要方法:
- 采用了阴离子诱导的自我组装过程,以形成导电性水凝.
- 在碳纳米管 (CNT) 中纳入多种子 (Li+,Na+,K+,Mg2+,Zn2+,Al3+,NH4+),分散水合V2O5 (h-V2O5) 纳米线.
- 在CNT表面上设计出额外层离子通道,以补充内在的h-V2O5间层.
主要成果:
- 额外层的通道受到阴子大小的影响,显著影响了阴极性能.
- 较大的阴离子改善了Zn2+迁移和扩散动力学.
- 较小的债券通过加强M-O债券来增强结构稳定性.
- K-V2O5/CNT 实现了高初始容量 (618 mAh g-1 在 0.2 A g-1) 并保持 248 mAh g-1 在 20 A g-1.
- Zn-V2O5/CNT 呈现出极好的循环稳定性 (230 mAh g-1 在 1 A g-1 的 700 个循环后).
结论:
- 阴离子诱导的自我组装策略为AZIBs的水凝阴极中量身定制离子运输提供了一个多功能平台.
- 这种方法可以开发具有增强功率和能量密度的先进阴极材料.
- 该研究展示了一种用于优化储能材料中离子扩散和结构完整性的新方法.
更多相关视频
相关概念视频
Voltage-gated Ion Channels
7.8K
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...
7.8K
The Role of Ion Channels in Neuronal Computation
3.1K
A postsynaptic neuron usually receives numerous impulses from several other presynaptic neurons. The axon hillock of the postsynaptic neuron integrates all these signals and determines the likelihood of firing an action potential.
Sometimes a single EPSP is strong enough to induce an action potential in the postsynaptic neuron. However, multiple presynaptic inputs must often create EPSPs around the same time for the postsynaptic neuron to be sufficiently depolarized to fire an action potential....
Sometimes a single EPSP is strong enough to induce an action potential in the postsynaptic neuron. However, multiple presynaptic inputs must often create EPSPs around the same time for the postsynaptic neuron to be sufficiently depolarized to fire an action potential....
3.1K
Electrophysiology of Normal Cardiac Rhythm
1.6K
The normal cardiac rhythm is a synchronized electrical activity that facilitates the regular and coordinated contraction of the heart muscle. This process is essential for efficient blood circulation throughout the body. The fundamental elements involved in establishing and maintaining this rhythm include the unique electrical properties of cardiac muscle cells, the sinoatrial (SA) node's pacemaker function, the specialized conducting system, and the ionic mechanisms underlying each phase...
1.6K
Non-gated Ion Channels
6.6K
Ion channels are specialized proteins on the plasma membrane that allow charged ions to pass down their electrochemical gradient. Their main function is to maintain the membrane potential which is critical for cell viability. These channels are either gated or non-gated and can transport more than a thousand ions within milliseconds for the cellular event to occur.
Compared to the gated ion channels, the non-gated channels, also known as leakage or passive channels, have no gating mechanism....
Compared to the gated ion channels, the non-gated channels, also known as leakage or passive channels, have no gating mechanism....
6.6K
Conduction System of the Heart
408
The cardiac conduction system produces and transmits electrical impulses that prompt myocardial contraction, ensuring efficient heart function. This intricate system ensures that the heart beats in a coordinated and efficient manner, beginning with the atria and then the ventricles. The conduction system optimizes cardiac output by maintaining this precise sequence, which is crucial for adequate blood circulation.
This system relies on the unique properties of nodal and Purkinje cells:...
This system relies on the unique properties of nodal and Purkinje cells:...
408
Cardiac Action Potential
579
Cardiac action potentials are essential for proper heart function, enabling the rhythmic contractions needed for adequate blood circulation. Nodal cells and Purkinje fibers, specialized for electrical conduction, generate these action potentials.
The cardiac action potential process involves a series of phases characterized by the movement of ions across the cardiac cell membranes, leading to the depolarization and repolarization of the cardiac myocytes.
Ionic Basis of Cardiac Action Potentials
The cardiac action potential process involves a series of phases characterized by the movement of ions across the cardiac cell membranes, leading to the depolarization and repolarization of the cardiac myocytes.
Ionic Basis of Cardiac Action Potentials
579


