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相关概念视频

Primary Active Transport01:29

Primary Active Transport

10.1K
In contrast to passive transport, active transport involves a substance being moved through membranes in a direction against its concentration or electrochemical gradient. There are two types of active transport: primary active transport and secondary active transport. Primary active transport utilizes chemical energy from ATP to drive protein pumps embedded in the cell membrane. With energy from ATP, the pumps transport ions against their electrochemical gradients—a direction they would...
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Ion Channels01:19

Ion Channels

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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...
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Formation of Complex Ions03:45

Formation of Complex Ions

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A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
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Long-term Potentiation01:35

Long-term Potentiation

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Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre- and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.
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The Supercomplexes in the Crista Membrane01:41

The Supercomplexes in the Crista Membrane

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The mitochondrial cristae membrane is the primary site for the oxidative phosphorylation (OXPHOS) process of energy conversion mediated through respiratory complexes I to V. These complexes have been widely studied for decades, and it has been proven that they form supramolecular structures called respiratory supercomplexes (SC). These higher-order complexes may be crucial in maintaining the biochemical structure and improving the physiological activity of the individual complexes while...
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The Role of Ion Channels in Neuronal Computation01:19

The Role of Ion Channels in Neuronal Computation

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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....
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相关实验视频

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Making, Testing, and Using Potassium Ion Selective Microelectrodes in Tissue Slices of Adult Brain
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含有KF的相间形成使得离子存储能力更好.

Tianyi Zhang1, Ning Yuan1, Zijie Li1

  • 1College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China.

Molecules (Basel, Switzerland)
|July 13, 2024
PubMed
概括

可充电离子电池看起来很有前途,但电解质兼容性是关键. 在基于KFSI的电解质中,N-doped碳封装 bismuth 纳米复合材料的性能明显更好,显示出高容量和离子储存的保留能力.

关键词:
比斯木特阳极是什么意思电解质是一种电解质.纳米复合材料的使用方法纳米结构是一种纳米结构.离子电池 离子电池

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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
  • 储能 储能 储能 储能 储能 储能

背景情况:

  • 可充电离子电池 (KIBs) 为离子电池提供了可持续和成本有效的替代品.
  • 阳极-电解质兼容性是阻碍KIB商业化的一个关键挑战.
  • 在N-化碳 (N-C@Bi) 中封装的 (Bi) 纳米粒子被探索为潜在的KIB阳极.

研究的目的:

  • 为了研究不同电解质溶液中的N-C@Bi纳米复合材料的K离子储存性能.
  • 了解电解质成分对插入/移除机制的影响.
  • 确定有助于增强KIB电化学稳定性的因素.

主要方法:

  • 合成N-化碳封装Bi纳米颗粒 (N-C@Bi) 纳米复合材料的合成.
  • 基于KFSI和KPF6的电解质中的N-C@Bi阳极的电化学评估.
  • 循环后分析以调查材料形态和相间形成.

主要成果:

  • 在KFSI电解质中,N-C@Bi具有255.2 mAh g-1的高特异容量,在0.5 A g-1下保持96.24%的电解质.
  • 在基于KPF6的电解质中,N-C@Bi的容量较低,为209.0 mAh g-1和保持不良 (34.21%).
  • 循环后分析揭示了KF基电解质中的KF间相形成和完整的棒状形态,与卓越的性能相关.

结论:

  • 电解质的选择显著影响N-C@Bi阳极的K离子储存特性.
  • 在基于KFSI的电解质中形成稳定的KF间相可以提高容量保留和循环稳定性.
  • 当与合适的电解质配对时,N-C@Bi纳米复合材料显示出作为可充电离子电池的高性能阳极的潜力.