相关实验视频

Updated: Jun 23, 2025

Zinc-Sponge Battery Electrodes that Suppress Dendrites

Zinc-Sponge Battery Electrodes that Suppress Dendrites

Published on: September 29, 2020

协同作用的电催化和空间纳米限制加速硫转化动力学在水性Zn-S电池中

Jun Li¹, Jinlong Liu², Fangxi Xie³

¹School of Chemistry and Chemical Engineering, Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials, South China University of Technology, Guangzhou, 510640, P. R. China.

Angewandte Chemie (International ed. in English)

|June 26, 2024

概括

水性电池中的硫阴极表现有希望,但反应缓慢. 这项研究介绍了一种新的硫-联合化碳纳米纤维复合材料,可以增强反应动力学并提高电池性能.

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
储能储能储能储能储能储能

背景情况:

水性电池具有理论上高的能量密度,低成本和安全性.
转换型硫阴极因反应动力学缓慢而面临挑战,导致放电电压降低和硫利用效率低下.
这些限制抑制了硫电池的实际能量密度.

研究的目的:

为水性电池开发高性能阴极材料.
通过增强硫还原反应 (SRR) 动力学来解决硫阴极的动力限制.
为了提高硫电池的整体能量密度和效率.

主要方法:

制造的硫纳米颗粒被限制在硫和联合化碳纳米纤维 (S@S,N-CNF) 与黄S@C纳米结构.
使用连续的硫化,热解和硫化物氧化过程进行材料合成.
运用密度函数理论 (DFT) 计算来研究反应机制和能量障碍.

主要成果:

这种S@S,N-CNF复合物表现出黄S@C纳米结构,增强电荷转移并降低激活能量.
硫和的联合兴奋剂有效催化了减少硫反应 (SRR),通过减少能量障碍和加速动力学.
DFT的计算证实,双重兴奋剂显著降低了SRR中速率决定步骤的能量屏障,从而提高了动力学.

结论:

开发的S@S,N-CNF阴极材料在水性电池中显著改善了SRR动力学和性能.
蛋黄结构和S,N-共的协同效应对于提高电化学性能至关重要.
这项工作为设计高性能水性硫电池的先进阴极材料提供了一个有前途的策略.

关键词:

加速运动的动力学.水性硫电池的电池是水性硫电池.空间纳米封闭的空间.减少硫的反应反应协同作用的电催化剂.

更多相关视频

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction

Published on: April 10, 2018

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Published on: December 6, 2021

相关概念视频

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...

Voltaic/Galvanic Cells

Voltaic/Galvanic Cells

Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...

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...