相关实验视频

Updated: Sep 10, 2025

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

协同双工程使得高性能离子电池的稳定基层氧化物阴极成为可能

Jingqiang Wang¹, Diancheng Chen², Hanghang Dong^3,4

¹College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, Inner Mongolia 010021, China.

|August 27, 2025

概括

用Mo/Mg进行双位合并可稳定离子电池 (SIB) 的氧化物阴极,提高高能储能应用的结构完整性和空气稳定性.

科学领域:

材料科学
电化学
能量储存

背景情况:

离子电池 (SIB) 的氧化正极面临着雅恩-泰勒扭曲和相位过渡等挑战.
结构性降解限制了SIB阴极的性能和周期寿命.

研究的目的:

在SIB中开发基于Mn的氧化物正极的双位稳定策略.
通过Mo/Mg配合增强SIB阴极的结构完整性,容量和空气稳定性.

主要方法:

通过双位稳定合成了P2层的Na0.44Mn0.97Mo0.01Mg0.02O2 (MoMg-12) 阴极材料.
研究了Mo和Mg离子对阴极结构的协同作用.
评估电化学性能,包括特定容量,速率能力和循环稳定性.
使用补偿添加剂 (Na2C2O4) 评估实际可行性

主要成果:

通过Mo/Mg配合,道式结构变成了稳定的P2层结构,从而提高了容量.
通过Mo和Mg的协同作用,抑制了Jahn-Teller扭曲,并通过减少Na+/H+交换改善了空气稳定性.
优化的MoMg-12阴极实现了 189 mAh g-1 的高特异容量,具有出色的速率能力和长期循环稳定性.
当与Na2C2O4添加剂配对时,已经证明了实际可行性.

结论:

通过Mo/Mg配合有效地保持基于Mn的SIB阴极的结构完整性.
这一策略为设计高能量密度和空气稳定的SIB阴极提供了有前途的方法.
这项研究为先进的离子电池材料提供了实用设计示例.

关键词:

雅恩-泰勒扭曲基于Mn的氧化物阴极双钉工程动态的结构演变离子电池

更多相关视频

Elemental-sensitive Detection of the Chemistry in Batteries through Soft X-ray Absorption Spectroscopy and Resonant Inelastic X-ray Scattering

Elemental-sensitive Detection of the Chemistry in Batteries through Soft X-ray Absorption Spectroscopy and Resonant Inelastic X-ray Scattering

Published on: April 17, 2018

Construction and Testing of Coin Cells of Lithium Ion Batteries

Construction and Testing of Coin Cells of Lithium Ion Batteries

Published on: August 2, 2012

相关概念视频

Ionic Bonding and Electron Transfer

Ionic Bonding and Electron Transfer

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.

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...