相关实验视频
Updated: Jan 10, 2026
06:58
Zinc-Sponge Battery Electrodes that Suppress Dendrites
Published on: September 29, 2020
4.8K
在水性电池的高能量密度有机电极中的超波子运动
Boyu Li1,2, Jiabin Ma1,2, Ke Yang1,2
1Shenzhen All-Solid-State Lithium Battery Electrolyte Engineering Research Center, Institute of Materials Research (IMR), Tsinghua Shenzhen International Graduate School, Shenzhen, China.
Nature communications
|November 21, 2025
概括
研究人员通过创建一个短键网络,增强了水性-有机电池中的质子转移. 这提高了质子储存能力和能量密度,用于先进的电池应用.
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:
- 有机正电极中的有限的质子转移动力学限制了水性有机电池中的质子存储能力和能量密度.
- 开发高效的质子传输机制对于高性能水性有机电池至关重要.
研究的目的:
- 通过在正极矩阵内交联的短键网络创建质子的超和运动来实现快速的质子转移.
- 为了提高能量密度和减少水性有机电池中的极化.
主要方法:
- 合成pyrazino[2,3-g]quinoxaline-5,10-dione以吸引和缩离子,形成局限的水-域.
- 使用4,4'-二氨基胺和聚四乙烯结合剂建立强键相互作用,减少分子间距离并创建水-域的相互连接网络.
- 在整个电极矩阵中构建一个短键网络,以促进快速的质子运输.
主要成果:
- 通过工程短键网络实现了快速质子传输,使极化减少到1.47 × 10−3 S cm−1.
- 复合正电极在0.1 A g-1的电流密度下显示出400 Wh kg-1的高特异能.
- 该研究成功地确定了电极矩阵内的水-域的高度相互连接状态.
结论:
- 开发的短键网络有效地提高了水性有机电池中的质子转移动力学和存储能力.
- 这些发现通过优化电极材料和结构,为高能量密度的水性有机电池铺平了道路.
- 这项工作为设计高效储能应用的先进电极材料提供了一种新的策略.
相关概念视频
03:02Standard Electrode Potentials
49.7K
On comparing the reactivity of silver and lead, it is observed that the two ionic species, Ag+ (aq) and Pb2+ (aq), show a difference in their redox reactivity towards copper: the silver ion undergoes spontaneous reduction, while the lead ion does not. This relative redox activity can be easily quantified in electrochemical cells by a property called cell potential. This property is commonly known as cell voltage in electrochemistry, and it is a measure of the energy which accompanies the charge...
49.7K
03:12Batteries and Fuel Cells
30.7K
A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
30.7K
02:47Voltaic/Galvanic Cells
62.9K
Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
62.9K
01:27π Electron Effects on Chemical Shift: Overview
1.6K
An applied magnetic field causes loosely bound π-electrons in organic molecules to circulate, producing a local or induced diamagnetic field over a large spatial volume. As the molecules tumble in solution, the field generated by π-electrons in spherical substituents results in a zero net field. However, the net field generated by π-electrons in non-spherical substituents is not zero. The effect of this induced field depends on the orientation of the molecule with respect to B0,...
1.6K
03:00Electrolysis
30.1K
In a galvanic cell, the electrical work is done by a redox system on its surroundings as electrons produced by the spontaneous redox reactions are transferred through an external circuit. Alternatively, an external circuit does work on a redox system by imposing a voltage sufficient to drive an otherwise nonspontaneous reaction in a process known as electrolysis. For instance, recharging a battery involves the use of an external power source to drive the spontaneous (discharge) cell reaction in...
30.1K