相关实验视频

Updated: Jan 13, 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Fick的定律来稳定丰富的基阴极中的晶格氧的梯度Mo兴奋剂

Wencheng Pan¹, Luxiang Ma¹, Chunxi Hai¹

¹College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, P. R. China.

Small (Weinheim an der Bergstrasse, Germany)

|January 12, 2026

概括

渐变兴奋剂通过防止氧气损失和改善循环稳定性来稳定富 (LR) 阴极. 这提高了先进电池应用的能量密度.

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 (LR) 的基阴极通过氧氧还原提供高能量密度.
然而,由于不可逆转的氧气释放,它们遭受结构退化和循环稳定性差.
稳定散装格子氧和表面接口对于改善LR阴极性能至关重要.

研究的目的:

开发一个渐变 (Mo) 兴奋剂策略,以稳定丰富的基阴极.
调查Mo兴奋剂对氧气稳定性,结构完整性和电化学性能的影响.
为高能量密度LR阴极提供统一的表面到散装修改路线.

主要方法:

菲克的法律引导的梯度Mo兴奋剂策略.
在现场形成Li₂MoO₄涂层和部分螺旋结构.
电化学性能测试 (容量,循环稳定性) 和理论计算 (+扩散屏障,氧稳定性).

主要成果:

渐变的Mo兴奋剂有效地抑制了不可逆转的氧气释放.
形成了in situLi2MoO4涂层和部分螺旋结构,增强了表面保护.
优化的LR@S-Mo阴极实现了195.1mAh·g-1的可逆容量,在300个循环后保持88.6%.
理论计算证实了减少Li+扩散障碍和增强氧气稳定性.

结论:

渐变胺注剂提供了一种稳定的方法来稳定富含和的基阴极.
结合的表面和散装修改策略显著提高了循环稳定性和能量密度.
这种方法为开发下一代高能量密度离子电池提供了有希望的途径.

关键词:

菲克的定律菲克的定律渐变兴奋剂 - 渐变兴奋剂氧气的不可逆转释放是不可逆转的富有的基基.

更多相关视频

$In Situ Neutron Powder Diffraction Using Custom-made Lithium-ion Batteries$ 11:25

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

Published on: November 10, 2014

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

相关概念视频

Trends in Lattice Energy: Ion Size and Charge

Trends in Lattice Energy: Ion Size and Charge

An ionic compound is stable because of the electrostatic attraction between its positive and negative ions. The lattice energy of a compound is a measure of the strength of this attraction. The lattice energy (ΔHlattice) of an ionic compound is defined as the energy required to separate one mole of the solid into its component gaseous ions. For the ionic solid sodium chloride, the lattice energy is the enthalpy change of the process:

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+...