相关实验视频

Updated: Jun 28, 2025

$In Situ Neutron Powder Diffraction Using Custom-made Lithium-ion Batteries$

In Situ Neutron Powder Diffraction Using Custom-made Lithium-ion Batteries

Published on: November 10, 2014

在金属电解质接口上操纵扩散能障碍,用于无石长寿命电池

Jyotshna Pokharel^1,2, Arthur Cresce³, Bharat Pant⁴

¹Department of Mechanical Engineering, The University of Texas at Dallas, Richardson, TX, USA.

Nature communications

|April 10, 2024

概括

使用纯相晶体化 (Li3N) 创建稳定的人工固体电解质间相 (SEI),通过提高机械强度和离子传输,提高效率和循环稳定性来提高金属电池的性能.

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:

金属电池的能量密度很高,但由于不稳定的固体电解质界面 (SEI) 导致了树突形成和低库伦比效率.
了解SEI机械性能和Li+运输之间的相互作用对于设计稳定的金属电池至关重要.

研究的目的:

开发一种简单且可扩展的方法,在金属阳极上构建一个纯相晶体Li3N丰富的SEI.
为了研究SEI的机械性能,Li+运输和电极稳定性之间的相关性.

主要方法:

一种富含Li3N的相纯晶体SEI的溶液处理合成.
阶段场模拟与实验性表征的整合.
对称电池和全金属电池的电化学测试.

主要成果:

成功形成了富含Li3N的纯相/单晶SEI,与多晶SEI相比,具有更高的机械强度和更低的Li+扩散屏障.
证明了改进的Li+转移数,扩散行为和度梯度管理.
在对称和完整的电池中实现了增强的可逆性和充/放电循环性能.

结论:

富含Li3N的纯相晶体SEI有效抑制了树突,并提高了库伦比效率.
这项工作为设计高性能和稳定的金属电池的强大的人工SEI提供了关键的见解.

更多相关视频

Failure Analysis of Batteries Using Synchrotron-based Hard X-ray Microtomography

Failure Analysis of Batteries Using Synchrotron-based Hard X-ray Microtomography

Published on: August 26, 2015

Three-electrode Coin Cell Preparation and Electrodeposition Analytics for Lithium-ion Batteries

Three-electrode Coin Cell Preparation and Electrodeposition Analytics for Lithium-ion Batteries

Published on: May 22, 2018

相关概念视频

Batteries and Fuel Cells

Batteries and Fuel Cells

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...