改进的离子电子混合接口用于高能固态金属电池
Tingting Luo1, Bing Liu1, Weibo Han1
1School of Chemical Engineering, North China University of Science and Technology, Tangshan 063009, China.
Journal of colloid and interface science
|August 31, 2023
概括
研究人员开发了一种用于固态金属电池的离子电子混合接口. 这项创新增强了接口接触,抑制了树突的生长,并使其能够稳定地循环超过1000小时.
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:
- 固态金属电池 (SSLMB) 提供了更高的安全性和能量密度.
- 在SSLMB中,接口接触较差会导致高阻抗和树突的生长.
- 解决这些接口问题对于实际的SSLMB应用至关重要.
研究的目的:
- 在Li1.3Al0.3Ti1.7(PO4)3 (LATP) 固体电解质上引入一个离子电子混合 (IEM) 接口.
- 为了改善界面接触,并抑制SSLMBs中的树生长.
- 为了提高SSLMB的循环稳定性和性能.
主要方法:
- 在LATP固体电解质表面上通过现场反应创建了一个离子-电子混合 (IEM) 接口.
- IEM中间层形成了LixSn/LiI,是一种快速的离子导体.
- 评估了电化学性能,重点是不同电流密度的循环稳定性.
主要成果:
- IEM中间层有效地产生了一个LixSn/LiI接口,促进了Li+传输和抑制了电子导电.
- 带有IEM@LATP电解质的SSLMBs在0.1 mA cm-2下表现出稳定的循环超过1000小时.
- 电池保持正常运行,即使在高电流密度为3.0mA cm-2.
结论:
- 开发的IEM接口成功地减轻了树的生长,并改善了SSLMB的接口接触.
- 这种方法为提高SSLMB的性能和实际应用提供了一个可行的策略.
- 该IEM战略显示了其对其他固态电池系统的潜在普遍适用性.
更多相关视频
相关概念视频
Interfacial Electrochemical Methods: Overview
284
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...
284
Ionic Bonding and Electron Transfer
41.7K
Ions are atoms or molecules bearing an electrical charge. A cation (a positive ion) forms when a neutral atom loses one or more electrons from its valence shell, and an anion (a negative ion) forms when a neutral atom gains one or more electrons in its valence shell. Compounds composed of ions are called ionic compounds (or salts), and their constituent ions are held together by ionic bonds: electrostatic forces of attraction between oppositely charged cations and anions.
41.7K
Batteries and Fuel Cells
27.6K
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...
27.6K


