相关实验视频

Updated: Jul 16, 2025

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Published on: August 12, 2013

高能Li-S电池与Li金属阳极和硫化多烯酸阴极的合策略

Hyeona Park¹, Hyokyeong Kang¹, Hyerim Kim¹

¹Department of Energy Engineering, Hanyang University, Seoul 04763, Republic of Korea.

ACS applied materials & interfaces

|September 19, 2023

概括

这项研究引入了一种基于碳酸盐的新型电解质,用于带有硫化聚烯 (SPAN) 阴极的硫 (Li-S) 电池. 电解质增强了Li金属阳极的稳定性和SPAN阴极的性能,实现了极好的循环性和抑制树突.

科学领域:

电化学电化学电化学
材料科学材料科学材料科学
储能储能储能储能储能储能

背景情况:

硫 (Li-S) 电池具有较高的理论能量密度.
聚硫化物形成和运输是Li-S电池性能的主要挑战.
碳酸盐电解质通常在Li-S电池中避免使用,因为Li金属阳极的兼容性差.

研究的目的:

设计和研究一种用于Li-S电池的新型碳酸盐基电解质.
为了提高金属阳极和硫化多烯 (SPAN) 阴极的稳定性.
在Li-S系统中克服传统以太基电解质的局限性.

主要方法:

一种特定的碳酸盐基电解质 (0.8M LiTFSI,0.2M LiDFOB,0.05M LiPF6在EMC/FEC中) 的配方.
用Li金属阳极和SPAN阴极对Li-S电池进行电化学测试.
操作光学显微镜,原子力显微镜 (AFM) 和拉曼光谱分析电极行为.

主要成果:

开发的电解质有效地稳定了金属阳极和SPAN阴极.
实现了高库伦比克效率 (>99.9%) 和稳定的循环能力.
操作显微镜证实了密集,均的沉积和抑制的树生长.
运行中的拉曼光谱显示了SPAN中通过二硫化物键动态的可逆Li+储存.

结论:

设计的碳酸盐基电解质可实现高性能Li-S电池.
这种电解质策略有效地解决了阳极不稳定性和SPAN阴极问题.
该电池在1000个循环中保持了73.5%的容量,突出显示了其在实际应用中的潜力.

关键词:

金属阳极是一种金属阳极.这种电池是LiS电池.西班牙西班牙是西班牙.树状的树状物电解质的电解质是一种电解质.

更多相关视频

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

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

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...

Preparation and Reactions of Sulfides

Preparation and Reactions of Sulfides

Sulfides are the sulfur analog of ethers, just as thiols are the sulfur analog of alcohol. Like ethers, sulfides also consist of two hydrocarbon groups bonded to the central sulfur atom. Depending upon the type of groups present, sulfides can be symmetrical or asymmetrical. Symmetrical sulfides can be prepared via an SN2 reaction between 2 equivalents of an alkyl halide and one equivalent of sodium sulfide.