相关实验视频
Updated: Jul 24, 2025

06:58
Zinc-Sponge Battery Electrodes that Suppress Dendrites
Published on: September 29, 2020
4.4K
排列的双极引发电场促进离子解离,朝着高度稳定的无树突的金属电池
Shuang Zhou1, Xinyu Meng1, Chunyan Fu1
1College of Chemistry and Chemical Engineering, School of Materials Science & Engineering, Central South University, Changsha, Hunan, 410083, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|July 3, 2023
概括
这项研究引入了对齐的二极电场策略,以防止水反应和树突在水性金属电池中的发生. 这种方法显著提高了电池的寿命和性能,为更安全,更持久的能源存储铺平了道路.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 水性金属电池面临着水诱导的寄生反应和不受控制的树生长的挑战.
- 这些问题源于电解质配置和离子运输,阻碍了电池的开发.
研究的目的:
- 为了从根本上改变离子溶解结构和运输行为,使用对齐的双极在表面诱导电场.
- 为了减轻与水相关的副作用,并抑制水性金属电池中的树状石的形成.
主要方法:
- 构建一个对齐的二极管在金属表面上诱导电场.
- 研究离子迁移轨迹和极化电场内的度.
- 评估电池性能,使用Zn 制Zn对称电池,Zn 制Cu半电池,NH4V4O10 制Zn半电池和MnO2 制Zn袋式电池.
主要成果:
- 电场策略导致垂直排序的离子迁移和离子缩,消除了水侧反应和树突.
- 金属表现出更好的可逆性,没有树突的表面,以及强大的 (002) 沉积纹理.
- 对称的细胞实现了1400小时的寿命 (17倍的改善).
- 半个半细胞显示了99.9%的库伦比效率.
- NH4V4O10 下载gadgadgadiaZn半电池在2000个循环后提供了132 mAh的g-1容量,并保持了100%的容量.
- 在实际条件下,MnO2的囊细胞在150个循环后保持了87.9%的容量.
结论:
- 排列双极诱导电场是一种新的策略,可以克服水性金属电池的关键限制.
- 这种方法显著提高了电池寿命,库伦比克效率和容量保留.
- 该战略有可能应用于其他金属电池,促进高能量密度,长寿命的储能解决方案的开发.
相关概念视频
Induced Electric Dipoles
4.3K
A permanent electric dipole orients itself along an external electric field. This rotation can be quantified by defining the potential energy because the external torque does work in rotating it. Then, the potential energy is minimum at the parallel configuration and maximum at the antiparallel configuration. While the former is a stable equilibrium, the latter is an unstable equilibrium.
Since the absolute value of potential energy holds no physical meaning, its zero value can be chosen as per...
Since the absolute value of potential energy holds no physical meaning, its zero value can be chosen as per...
4.3K
Electric Dipoles and Dipole Moment
5.2K
Consider two charges of equal magnitude but opposite signs. If they cannot be separated by an external electric field, the system is called a permanent dipole. For example, the water molecule is a dipole, making it a good solvent.
Theoretically, studying electric dipoles leads to understanding why the resultant electric forces around us are weak. Since electric forces are strong, remnant net charges are rare. Hence, the interaction between dipoles helps us understand electrical interactions in...
Theoretically, studying electric dipoles leads to understanding why the resultant electric forces around us are weak. Since electric forces are strong, remnant net charges are rare. Hence, the interaction between dipoles helps us understand electrical interactions in...
5.2K
DC Battery
828
A conductor needs to be a component of a path that creates a closed loop or full circuit to have a continuous current flowing through it. A current starts to flow if an electric field is created inside an isolated conductor that is not part of a full circuit. The conductor quickly develops a net positive charge at one end and a net negative charge at the other. These charges generate an electric field opposite the direction of the applied electric field, which reduces the current. Eventually,...
828
Formation of Complex Ions
23.7K
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...
23.7K
Potential Due to a Polarized Object
439
A neutral atom consists of a positively charged nucleus surrounded by a negatively charged electron cloud. When placed in an external electric field, the external electric force pulls the electrons and nucleus apart, opposite to the intrinsic attraction between the nucleus and the electrons. The opposing forces balance each other with a slight shift between the center of masses of the nucleus and the electron cloud, resulting in a polarized atom. On the other hand, a few molecules, like water,...
439
Standard Electrode Potentials
44.4K
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...
44.4K

