相关实验视频

Updated: Jun 21, 2025

Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature

Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature

Published on: December 20, 2016

电解质设计使可充电LiFePO₄/石墨电池从-80°C到80°C的温度

Zeheng Li^1,2, Yu-Xing Yao¹, Mengting Zheng²

¹Tsinghua Center for Green Chemical Engineering Electrification, Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, 100084, Beijing, China.

Angewandte Chemie (International ed. in English)

|July 15, 2024

概括

一种新的以为基础的电解质可以提高铁酸盐 (LFP) /石墨电池在极端温度下的性能. 这一进步提高了用于储能应用的快速充电和低温功率.

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:

铁酸盐 (LFP) /石墨电池是储能的关键,但其快速充电和低温性能不佳.
这些局限性源于接口 (Li) 离子传输的问题.
应对这些挑战对于更广泛地采用LFP/石墨电池技术至关重要.

研究的目的:

开发一种新的电解质,以提高LFP/石墨电池的性能.
为了克服不良快充和低温运行的局限性.
为了研究和改进接口离子运输.

主要方法:

通过调节盐离子化学,开发一种以为基础的广泛温度范围的电解质.
使用三电极系统和放松时间分布 (DRT) 技术对界面障碍物的定量分析.
系统地研究电解质在防止金属和稳定相间作用中的作用.

主要成果:

这种新型电解质表现出高离子导电性,快速的界面动力学和出色的薄膜形成能力.
LFP/石墨电池显示可靠的性能从-80°C到80°C,包括快速充电能力.
实用的袋式电池在1200次循环后保持了80.2%的容量,在25°C下在10分钟内实现了89%的充电.

结论:

开发的以为基础的电解质显著提高了LFP/石墨电池在超宽温度范围内的性能.
电解质有效地防止了涂层,并确保了稳定的接相,从而实现了卓越的循环稳定性和快速充电.
这一突破为先进的储能系统提供了有前途的解决方案,这些系统需要强大的温度耐受性和快速充电.

关键词:

合金涂层是指合金的涂层.LiFePO4/石墨电池的使用情况极端运行条件的极端运行条件界面动力学界面动力学具有广泛温度的电解质.

更多相关视频

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Published on: August 12, 2013

The Effect of Charging and Discharging Lithium Iron Phosphate-graphite Cells at Different Temperatures on Degradation

The Effect of Charging and Discharging Lithium Iron Phosphate-graphite Cells at Different Temperatures on Degradation

Published on: July 18, 2018

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...

Electrolysis

Electrolysis

In a galvanic cell, the electrical work is done by a redox system on its surroundings as electrons produced by the spontaneous redox reactions are transferred through an external circuit. Alternatively, an external circuit does work on a redox system by imposing a voltage sufficient to drive an otherwise nonspontaneous reaction in a process known as electrolysis. For instance, recharging a battery involves the use of an external power source to drive the spontaneous (discharge) cell reaction in...