相关实验视频
Updated: Jun 30, 2025
06:58
Zinc-Sponge Battery Electrodes that Suppress Dendrites
Published on: September 29, 2020
4.3K
一个没有树突的Zn阳极,由PEDOT:PSS/MoS电动道为水性Zn离子电池提供
Hai Wang1, Qin Zhao2, Weimin Li2
1Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8561, Japan. swatanabe@edu.k.u-tokyo.ac.jp.
Nanoscale
|March 20, 2024
概括
一种新的双功能聚合物涂层 (PEPM) 防止水性离子电池 (AZIB) 中的树突. 这种涂层确保了稳定的涂层和剥离,使电池寿命更长.
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:
- 树突和副作用破坏了水性离子电池 (AZIB) 中的阳极-电解质接口,限制了它们的应用.
- 人工接口构建是一种提高性能的策略,但由于Zn2+运输动力学缓慢,通常会受到阻碍.
研究的目的:
- 开发一种双功能聚合物涂层 (PEPM),以应对AZIBs的Zn涂层/脱落方面的挑战.
- 为了增强Zn2+的运输动力学,并促进单一的Zn核化为无树的阳极.
主要方法:
- 使用导电性PEDOT:PSS和单层MoS2.2构建了一个双功能聚合物涂层 (PEPM).
- 使用PEDOT作为一个性网站快速Zn离子转移和MoS2作为一个缓冲层均的Zn核化.
- 研究了涂层对Zn2+流动性和沉积均性的影响.
主要成果:
- 该PEPM涂层显著改善了Zn2+流动性和Zn沉积均性.
- 在超低超电位 (<50 mV) 的情况下,在2000小时内获得稳定的/剥离性能.
- 在1000个循环中表现出高的平均coulombic效率 (>99.4%),同时形成极少的树.
结论:
- 双功能PEPM涂层有效地抑制腐蚀,并定向Zn核化,从而产生无树的阳极.
- 这种成本效益高的策略增强了 Zn 阳极的稳定性,并为 AZIB 开发开辟了新的途径.
相关概念视频
03:02Standard Electrode Potentials
43.8K
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...
43.8K
03:12Batteries and Fuel Cells
27.3K
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...
27.3K
02:47Voltaic/Galvanic Cells
57.2K
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,...
57.2K