金属电池电流梯度的阳极电流采集器的进展
Chenglin Gao1, Jianli Kang1,2, Yimin Zhang1
1School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300350, P. R. China.
概括
金属电池 (LMB) 面临来自树突的安全问题. 梯度性电流收集器引导沉积,防止顶部增长并提高电池的安全性.
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:
- 金属电池 (LMB) 对于下一代能源存储至关重要.
- 树的生长带来了重大安全风险,并限制了LMB的实际应用.
- 目前的3D多孔采集器经常存在同质结构,导致沉积效率低下 ("顶部增长").
研究的目的:
- 审查最近在3D多孔电流采集器的进展,对LMBs具有性梯度.
- 分析抑制树形成和促进均沉积的策略.
- 突出各种梯度电流收集器设计的机制,优点和缺点.
主要方法:
- 总结了对当前收集器的基础材料表面修饰的研究.
- 审查当前收集器中梯度结构的设计原则.
- 分析场因子对性梯度电流采集器的影响.
主要成果:
- 渐变的性表面有效地引导沉积到集体底部.
- 工程梯度结构减轻了同质集体中观察到的"顶部增长"现象.
- 表面修改和结构设计是实现增强亲和力的关键.
结论:
- 梯度性电流采集器是改善LMB安全性和性能的一种有希望的策略.
- 进一步研究材料选择,梯度设计和场因子优化是有必要的.
- 这些先进的集电器有可能用于未来的高能量密度电池应用.
相关概念视频
What is an Electrochemical Gradient?
109.6K
Adenosine triphosphate, or ATP, is considered the primary energy source in cells. However, energy can also be stored in the electrochemical gradient of an ion across the plasma membrane, which is determined by two factors: its chemical and electrical gradients.
The chemical gradient relies on differences in the abundance of a substance on the outside versus the inside of a cell and flows from areas of high to low ion concentration. In contrast, the electrical gradient revolves around an...
The chemical gradient relies on differences in the abundance of a substance on the outside versus the inside of a cell and flows from areas of high to low ion concentration. In contrast, the electrical gradient revolves around an...
109.6K
Controlled-Current Coulometry: Overview
188
Controlled current coulometry, also known as amperostatic coulometry, is a technique used in electrochemical analysis to measure the quantity of a substance through the controlled passage of current. It involves the application of a constant current to an electrochemical cell containing the analyte of interest. As the current flows through the cell, the analyte undergoes a redox reaction at the electrode surface, resulting in a charge transfer. By monitoring the time required for a certain...
188
Batteries and Fuel Cells
27.2K
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...
27.2K
Electrogravimetric Analysis: Overview
213
Electrogravimetric analysis measures the weight of an analyte deposited electrolytically onto a suitable working electrode. This method involves applying a potential to a pre-weighed electrode submerged in a solution, which results in the desired substance being deposited through reduction at the cathode or oxidation at the anode. The electrode's weight is recorded after deposition, and the difference in weight gives the analyte's weight in the solution.
To test the completeness of the...
To test the completeness of the...
213
Biasing of Metal-Semiconductor Junctions
235
Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
235
Electrodeposition
616
Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...
Electrodeposition can...
616


