相关实验视频
Updated: Jun 4, 2025

06:58
Zinc-Sponge Battery Electrodes that Suppress Dendrites
Published on: September 29, 2020
4.3K
埋葬接口工程向高性能水性离子电池的稳定阳极
1School of Metallurgy and Environment, Central South University, Changsha 410083, China; Engineering Research Center of the Ministry of Education for Advanced Battery Materials, Central South University, Changsha 410083, China; National Energy Metal Resources and New Materials Key Laboratory, Central South University, Changsha 410083, China.
Science bulletin
|December 27, 2024
概括
一种新的埋藏接口工程策略通过使用涂上耐腐蚀硫化 (ZnS) 层的性锡 (Sn) 层来稳定阳极. 这种方法有效地抑制树突和腐蚀,提高电池性能和寿命.
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
- 电池技术 电池技术
背景情况:
- 阳极遭受了树突的生长和腐蚀,限制了它们在高性能电池中的应用.
- 目前的接口修改策略难以同时解决阳极中的树和腐蚀问题.
研究的目的:
- 为稳定阳极开发一种新的埋面接口工程策略.
- 为了同时抑制树突和腐蚀,提高电池循环稳定性.
主要方法:
- 嵌入式接口结构的制造,采用一种由耐腐蚀硫化 (ZnS) 层 (SZS) 覆盖的性锡 (Sn) 层.
- 在高电流密度和容量下对称电池中的SZS@Zn阳极和MnO2//SZS@Zn全电池的评估.
- 使用电化学技术分析沉积行为和耐腐蚀性.
主要成果:
- 该SZS@Zn对称电池在280小时以上的时间内表现出稳定的循环,显著超过裸Zn阳极 (41小时) 在10mA cm−2和10mAh cm−2.
- 与SZS@Zn阳极 (47.2%) 相比,具有SZS@Zn阳极的全细胞显示出增强的长期循环稳定性 (63.6%在10°C的1000个循环后),与裸体Zn阳极相比 (47.2%).
- 埋藏的Sn层促进了均的核化,而外层的ZnS层提供了有效的腐蚀保护.
结论:
- 采用Sn/ZnS结构的埋面接口工程是稳定阳极的高效策略.
- 这种方法为开发高性能和持久的金属电池提供了一个有希望的途径.
- 开发的策略可以扩展到为各种电池系统设计其他稳定的金属阳极.
相关概念视频
Standard Electrode Potentials
43.4K
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...
43.4K
Electrodeposition
597
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...
597
Extraction: Advanced Methods
415
Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
415
Formation of Complex Ions
23.2K
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...
23.2K
Interfacial Electrochemical Methods: Overview
218
Interfacial electrochemical methods focus on the phenomena occurring at the boundary between an electrode and a solution, as opposed to bulk methods that concentrate on the solution's overall properties. These interfacial methods are classified as either static or dynamic based on the presence of a nonzero current in the electrochemical cell and the consistency of analyte concentrations. Static methods, such as potentiometry, measure the cell's potential without any significant current...
218

