相关实验视频

Updated: Jul 23, 2025

Ultrasound Velocity Measurement in a Liquid Metal Electrode

Ultrasound Velocity Measurement in a Liquid Metal Electrode

Published on: August 5, 2015

超高面积容量Li电子沉积在金属固体电解质接口的最小堆压力下,由接口Na-K液体实现

Richard J-Y Park¹, Cole D Fincher¹, Andres F Badel¹

¹Department of Materials Science & Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States.

ACS applied materials & interfaces

|July 19, 2023

概括

研究人员使用Na-K液体膜开发了一种用于固态金属电池的新型接口. 这一创新使得在高容量的稳定金属和剥离,克服了下一代能源存储的关键障碍.

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
固态电池固态电池是什么

背景情况:

高能量密度可充电电池需要金属电极,但金属固体电解质接口遭受阻抗增长.
在实用的电流密度和容量循环时形成的空隙限制了当前固态电池的性能.

研究的目的:

研究一种方法来提高固态金属电池的界面稳定性.
为了使金属阳极具有更高的面积容量和电流密度.

主要方法:

在金属和固体电解质 (Li$_{6.75}$La$_{3}$Zr$_{1.75}$Ta$_{0.25}$O$_{12}$ - LLZTO) 之间引入一种- (Na-K) 液态湿膜.
在高电流密度和面积容量下,使用Na-K液体接口的金属阳极循环运行.
在剥离和涂层过程中分析细胞阻抗和接口行为.

主要成果:

实现了150μm Li (30 mAh cm-2) 的可逆剥离和涂层,大约是当前离子电池容量的10倍.
在电流密度> 0.5 mA cm^-2和压力<75 kPa时稳定循环,阻抗变化最小.
性能改进归因于剥离接口上的Na-K液体.

结论:

Na-K液体接口膜有效地抑制阻抗增长,并使金属阳极的高性能循环运行成为可能.
这种方法克服了阻碍固态金属电池开发的关键界面稳定性问题.
该战略对推进下一代可充电电池技术具有重大前景.

关键词:

金属阳极是一种金属阳极.离子电池是一种离子电池.缺陷缺陷缺陷缺陷缺陷树突 (dendrites) 是一种树突.固体电解质是一种固体电解质.

更多相关视频

Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques

Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques

Published on: November 11, 2013

Non-aqueous Electrode Processing and Construction of Lithium-ion Coin Cells

Non-aqueous Electrode Processing and Construction of Lithium-ion Coin Cells

Published on: February 1, 2016

相关概念视频

Electrodeposition

Electrodeposition

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...

Interfacial Electrochemical Methods: Overview

Interfacial Electrochemical Methods: Overview

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...