相关实验视频
Updated: Sep 12, 2025
09:04
Fabrication of VB2/Air Cells for Electrochemical Testing
Published on: August 5, 2013
12.0K
电场引导的离子编排用于多化学金属电池
Yao Wang1,2, Jinkai Zhang3, Xin Zhao1
1Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China.
Advanced materials (Deerfield Beach, Fla.)
|August 4, 2025
概括
电场引导的离子编排策略通过控制界面上的离子分布来提高金属电池的性能. 这使得稳定,无树脂的涂料和长时间的,广泛的温度操作.
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 (ZMB) 面临的挑战是由于在接口处的离子分布不受控制,导致进化和树突形成.
- 非水性辅溶剂部分解决了这些问题,但不能完全消除持续的水活动和过早的电池故障.
研究的目的:
- 开发电场引导离子编排 (EF-IO) 策略,以提高ZMB的稳定性和性能.
- 为了研究离子界面修饰剂在重新配置电双层 (EDL) 和溶解结构中的作用.
主要方法:
- 利用界面模拟和实验调查来分析离子行为和界面特性.
- 采用了离子界面修饰器来引导离子分布和重新配置EDL.
- 制造并测试了Zn的对称细胞和Zn的V10O24·12H2O的全细胞.
主要成果:
- 该EF-IO战略成功地使2+/Na+溶解配置多样化,并使电场均化.
- 形成了一种有机-无机梯度固体电解质介相 (SEI),抑制了寄生反应,并使得无树的涂层具有3400小时的可循环性.
- 完整电池表现出极好的耐用性和适应广泛的温度 (-45~55°C).
- 在高压有机阴极中使用ClO4-实现可逆离子储存.
结论:
- 该EF-IO战略提供了一种新的方法来管理ZMB中的接口动态.
- 这种方法提高了电池的循环使用性,耐用性和温度适应性.
- 该战略为高压有机阴极和多功能ZMB应用开辟了新的可能性.
相关概念视频
03:12Batteries and Fuel Cells
28.0K
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...
28.0K
03:02Standard Electrode Potentials
45.0K
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...
45.0K
01:21DC Battery
875
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,...
875
02:58Crystal Field Theory - Octahedral Complexes
27.9K
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
27.9K
03:45Formation of Complex Ions
24.0K
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...
24.0K
01:15Charging Conductors By Induction
8.2K
The Earth is a good conductor of electricity, and it is so big that it can be considered an infinite source or sink of charges. It can easily exchange charges with any matter.
Generally, conductors like metals do not allow any excess charge to be present on them. Any excess charge added to metals easily flows away, for example, when a metal is placed on the Earth. This process is called earthing.
However, conductors can be charged by a process called induction. For example, consider charging a...
Generally, conductors like metals do not allow any excess charge to be present on them. Any excess charge added to metals easily flows away, for example, when a metal is placed on the Earth. This process is called earthing.
However, conductors can be charged by a process called induction. For example, consider charging a...
8.2K