相关实验视频

Updated: Jul 9, 2025

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

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

Published on: November 10, 2014

在C₃N₄-CoSe₂的自发内置电场中,改造的多功能分离器加快了演变动力学和沉积,用于硫电池

Ziwei Liang¹, Chao Peng², Jiadong Shen¹

¹School of Materials Science and Engineering, Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials, South China University of Technology, Guangzhou, 510641, P. R. China.

Small (Weinheim an der Bergstrasse, Germany)

|December 6, 2023

概括

一种新的C3N4-CoSe2复合涂层通过吸附多硫化物和防止树生长来增强硫电池 (LSB). 这导致稳定的循环和高容量,即使在高温下.

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:

硫电池 (LSB) 理论上具有较高的能量密度,但受到聚硫化物穿和树形成的影响.
开发先进的分离器涂层对于提高LSB性能和周期寿命至关重要.

研究的目的:

设计和合成C3N4-CoSe2复合物作为LSB的功能分离涂层.
研究复合材料涂层增强聚硫化物吸附,电化学转化和沉积的机制.

主要方法:

在C3N4-CoSe2复合材料的制造.
将复合材料涂在LSB分离器上.
对LSB的电化学测试,包括循环稳定性,速率能力和阻抗光谱学.
对聚硫化物相互作用和沉积的分析.

主要成果:

该C3N4-CoSe2涂层通过化学吸收有效地吸附多硫化物 (LiPSs).
在复合材料接口的内部电场加速LiPS和电子运输,促进硫的转化.
涂层的性质和催化活性促进了的均沉积,抑制了树岩的形成.
带有功能分离器的LSB显示了稳定的周期寿命 (0.0819%的容量衰减在1C的每个周期) 和高面积容量 (10.30 mAh cm−2在0.1C).
在60°C时实现了优异的容量保留 (81.8%在1°C的100个循环后).

结论:

C3N4-CoSe2复合涂层是克服LSB关键挑战的有希望的策略.
这种功能化的分离器显著提高了LSB的电化学性能,稳定性和安全性.

关键词:

内置的电场内置的电场聚硫化的聚硫化.硫电池是硫电池的一种.动态反应动态反应穿效应的穿效应

更多相关视频

Non-aqueous Electrode Processing and Construction of Lithium-ion Coin Cells

Non-aqueous Electrode Processing and Construction of Lithium-ion Coin Cells

Published on: February 1, 2016

Screening of Coatings for an All-Solid-State Battery Using In Situ Transmission Electron Microscopy

Screening of Coatings for an All-Solid-State Battery Using In Situ Transmission Electron Microscopy

Published on: January 20, 2023

相关概念视频

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...