相关实验视频

Updated: Jun 9, 2025

Fabrication of VB2/Air Cells for Electrochemical Testing

Fabrication of VB2/Air Cells for Electrochemical Testing

Published on: August 5, 2013

架构V₂O₅与三元水晶-无形-晶体特征,用于坚固的离子电池

Zhenzhen Zhao¹, Miao Liu¹, Fuxi Liu¹

¹Key Laboratory of Automobile Materials MOE, School of Materials Science & Engineering, Electron Microscopy Center, International Center of Future Science, and Jilin Provincial International Cooperation Key Laboratory of High-Efficiency Clean Energy Materials, Jilin University, Changchun 130012, China.

|October 23, 2024

概括

研究人员开发了一种新的混合结构,用于水性离子电池 (AZIB) 中的氧化 (V2O5·1.6H2O) 电极. 这种设计增强了结构完整性,并促进了Zn2+扩散,从而提高了电化学性能和循环寿命.

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
储能储能储能储能储能储能

背景情况:

水性离子电池 (AZIB) 面临着电极结构崩和强烈的静电相互作用的挑战,限制了循环寿命.
氧化水合物 (VOH) 是有前途的阴极材料,但在AZIB中存在结构不稳定性.
在VOH中的水晶有助于强大的静电相互作用,阻碍离子扩散和电池性能.

研究的目的:

设计和合成一个有序/无序的混合VOH电极结构,以提高AZIB性能.
调查混合结构在保护电极完整性和促进Zn2+动力学方面的作用.
为了提高AZIB中的VOH阴极的长期循环稳定性和电化学性能.

主要方法:

一个有序/无序的混合VOH电极结构的合成.
电化学表征包括静电循环和速率能力测试.
使用先进技术分析结构完整性和离子扩散机制.

主要成果:

混合结构有效地保持了VOH电极的完整性,防止结构崩.
观察到缓解静电相互作用和促进Zn2+扩散动力学.
VOH电极在2Ag-1下输送了227.8 mAhg-1并保持了95%的容量,在1000个周期内在1Ag-1.1下保持了95%的容量.

结论:

顺序/无序混合结构是一种可行的策略,可以克服AZIB中VOH电极的局限性.
水晶水作为层间支柱,显著增强了电极的结构稳定性.
这种方法导致高电化学性能和长周期寿命,为实际的AZIB应用铺平了道路.

关键词:

V2O5 的时间.水性离子电池水性离子电池有序/无序的混合结构结构.稳定性表现的稳定性表现

更多相关视频

Zinc-Sponge Battery Electrodes that Suppress Dendrites

Zinc-Sponge Battery Electrodes that Suppress Dendrites

Published on: September 29, 2020

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

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

Published on: November 10, 2014

相关概念视频

Ionic Crystal Structures

Ionic Crystal Structures

Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...

Formation of Complex Ions

Formation of Complex Ions

A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...