相关实验视频

Updated: Feb 24, 2026

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Published on: August 12, 2013

乙烯基酸盐封闭的现场聚合物作为可持续固态硫电池的动态活性介质

Yi Zhang¹, Wenyi He¹, Hun Kim²

¹Key Lab for Special Functional Materials of Ministry of Education, National & Local Joint Engineering Research Center for High-efficiency Display and Lighting Technology, School of Nano Science and Materials Engineering, Collaborative Innovation Center of Nano Functional Materials and Applications, Henan University, Kaifeng 475004, China.

Journal of the American Chemical Society

|February 23, 2026

概括

本研究介绍了用于固态硫 (Li-S) 电池的动态活性介质 (DAM) 电解质. 该DAM系统有效地防止了死多硫化物 (LiPS) 的阴极堵塞,提高了电池的性能和安全性.

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:

基于固体聚合物电解质 (SPE) 的硫 (Li-S) 电池具有高的理论能量密度和安全性.
一个关键的故障机制是阴极-SPE接口被死多硫化物 (LiPS) 堵塞.
这种LiPS积累阻碍了氧化还原过程,限制了固态Li-S电池 (SSLSB) 的实际应用.

研究的目的:

通过开发动态活性介质 (DAM) 电解质系统来解决SSLSB中的LiPS堵塞问题.
为了优化电极-电解质接口兼容性和LiPS管理.
为了提高硫氧化还原反应动力学和电池的整体性能.

主要方法:

使用乙烯基酸和1,3-二氧化 (DOL) 的 DAM 电解质系统的生成.
在阴极和现场聚合的基于polyDOL的SPE之间集成DAM系统.
评估界面兼容性,LiPS吸附/重新激活,以及氧化还原反应动力学.

主要成果:

DAM系统优化了接口兼容性,并重新激活了积累的LiPS.
减少硫氧化还原反应的能量障碍,加速动力学.
在4.5毫克/厘米/厘米/厘米的硫载荷下,SSLSB实现了347Wh kg-1的能量密度.
袋式电池在80个循环后保持了85.3%的容量保留.

结论:

接口DAM策略有效地抑制了SSLSB中的LiPS积累.
这种方法提供了一种创新的工程概念,可以提高Li-S电池的寿命.
开发的系统增强了能量密度和循环稳定性,用于实际应用.

更多相关视频

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

Focused Ion Beam Fabrication of LiPON-based Solid-state Lithium-ion Nanobatteries for In Situ Testing

Focused Ion Beam Fabrication of LiPON-based Solid-state Lithium-ion Nanobatteries for In Situ Testing

Published on: March 7, 2018

相关概念视频

Weak Acid Solutions

Weak Acid Solutions

Few compounds act as strong acids. A far greater number of compounds behave as weak acids and only partially react with water, leaving a large majority of dissolved molecules in their original form and generating a relatively small amount of hydronium ions. Weak acids are commonly encountered in nature, being the substances partly responsible for the tangy taste of citrus fruits, the stinging sensation of insect bites, and the unpleasant smells associated with body odor. A familiar example of a...

Acid Halides to Alcohols: LiAlH4 Reduction

Acid Halides to Alcohols: LiAlH₄ Reduction

Acid halides are reduced to alcohols in the presence of a strong reducing agent like lithium aluminum hydride.
The mechanism proceeds in three steps. First, the nucleophilic hydride ion attacks the carbonyl carbon of the acid halide to form a tetrahedral intermediate. Next, the carbonyl group is re-formed, and the halide ion departs as a leaving group, generating an aldehyde. A second nucleophilic attack by the hydride yields an alkoxide ion, which, upon protonation, gives a primary alcohol as...