具有超长周期寿命的离子电池在广泛的温度范围内通过接口链摇摆
Jinwang Huang1,2, Lulu Song1,2, Bo Zhang1
1Key Laboratory of Green and High-end Utilization of Salt Lake Resources, Qinghai Provincial Key Laboratory of Resources and Chemistry of Salt Lakes, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, Qinghai, 810008, China.
Advanced materials (Deerfield Beach, Fla.)
|May 15, 2025
概括
这项研究引入了纳米-Mg(OH) 2@Tween80以提高离子电池在不同温度上的性能. 这种修改改善了阴极-电解质相间稳定性,在高温和低温下提高了循环寿命.
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:
- 阴极电解质介面 (CEI) 对于离子电池 (LIB) 的性能至关重要,特别是在广泛的温度条件下.
- 提高高温和低温阴极性能往往需要相互矛盾的策略,阻碍统一的方法.
研究的目的:
- 开发一种新的接口策略,同时提高LIB的高温和低温性能.
- 调查纳米-Mg(OH) 2@Tween80在修改阴极表面及其对CEI的影响中的作用.
主要方法:
- 合成的纳米-Mg(OH) 2@Tween80使用Tween80作为一个灵活的封闭空间框架.
- 修改了LiNi0.5Co0.2Mn0.3O2阴极表面的纳米-Mg(OH) 2@Tween80.
- 在不同温度 (60°C,-5°C,-15°C) 的半电池中评估电池性能.
主要成果:
- 纳米-Mg(OH) 2@Tween80修饰促进了稳定,导电的富含Mg的间相的形成.
- Tween80的链加速了电解质在阴极表面的扩散,使得离子的快速转移.
- 修改后的阴极表现出了很好的长期循环稳定性:>70 mAh·g-1在60°C (1000个循环) 和80 mAh·g-1在-5°C (500个循环).
结论:
- 使用纳米-Mg(OH) 2@Tween80的接口驱动策略有效地统一了LIBs的高温和低温性能改进.
- 这种方法增强了CEI稳定性和离子动力学,导致更高的周期寿命和广泛的温度可操作性.
相关概念视频
03:12Batteries and Fuel Cells
26.8K
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...
26.8K
01:20Anionic Chain-Growth Polymerization: Overview
2.0K
The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...
2.0K