相关实验视频

Updated: Jan 10, 2026

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

通过Sn兴奋剂通过调带结构增强丰富的Mn基阴极的阳离子氧化逆转性和结构稳定性

Haiping Zhang¹, Kang Ma², Tian Qiu³

¹School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.

|November 25, 2025

概括

在以丰富的Mn为基础的阴极 (LRMs) 中使用Sn兴奋剂可以增强阳离子氧化还原可逆性和结构稳定性. 这一策略提高了先进电池应用的循环稳定性和高速性能.

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
固态化学固态化学

背景情况:

富含的Mn基阴极 (LRM) 通过阳离子还氧化提供高特异性容量.
阴离子氧化还原不可逆性导致氧气释放和Mn-离子迁移,导致容量衰减.
结构不稳定性和电压衰减限制了LRM的性能.

研究的目的:

为了增强阴离子氧化还原可逆性和LRMs的结构稳定性.
调查Sn兴奋剂在Mn部位对LRM性能的影响.
为了提高LRMs的循环稳定性和高速率能力.

主要方法:

密度函数理论 (DFT) 计算用于电子结构分析.
合成和特征的Sn-doped LRMs. 这是一个很好的方法.
电化学性能测试 (循环稳定性,速度能力).

主要成果:

斯恩兴奋剂调节能量波段,增强O2p轨道与 (TM-O) 反键轨道的重叠.
这种带工程提高了阳离子氧化还原的可逆性,并抑制了氧气的释放.
化剂降低了Mn3+含量,并减轻了MnO6八面体的扭曲,提高了结构稳定性.
用sn-doped的LRM表现出卓越的循环稳定性和高速率性能.

结论:

吸毒是改善LRM性能的一种有效策略.
通过Sn兴奋剂的能量带工程增强了阳离子氧化还原可逆性和结构稳定性.
这种方法为开发用于储能的高性能LRM提供了一条途径.

关键词:

富含的 Mn 基阴极.阴离子氧化还原剂一个元素的兴奋剂是兴奋剂.能量波段调制的能量波段调制离子电池的离子电池是什么

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

In Situ Lithiated Reference Electrode: Four Electrode Design for In-operando Impedance Spectroscopy

In Situ Lithiated Reference Electrode: Four Electrode Design for In-operando Impedance Spectroscopy

Published on: September 12, 2018

相关概念视频

Ladder Diagrams: Redox Equilibria

Ladder Diagrams: Redox Equilibria

Ladder diagrams are useful tools for understanding redox equilibrium reactions, especially the effects of concentration changes on the electrochemical potential of the reaction. The vertical axis in the redox ladder diagrams represents the electrochemical potential, E. The area of predominance is demarcated using the Nernst equation.
Consider the Fe3+/Fe2+ half-reaction, which has a standard-state potential of +0.771 V. At potentials more positive than +0.771 V, Fe3+ predominates, whereas Fe2+...

Metal-Ligand Bonds

Metal-Ligand Bonds

The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...