由多接口内置电场和沙漠般的结构驱动的压力消耗,用于超快速和优质的长期离子存储
Jinhang Li1, Huiying Yu2, Yingying Zhao1,2
1Key Laboratory of In-Fiber Integrated Optics (Ministry of Education), College of Physics and Optoelectronic Engineering, Harbin Engineering University, Harbin, 150001, China.
Angewandte Chemie (International ed. in English)
|January 16, 2024
概括
使用内置电场和架构结构的新策略有效地消除了离子阳极中的压力. 这种方法可以实现超快速和长期的离子存储,提高电池性能.
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
- 纳米技术 纳米技术
背景情况:
- 基于转换的离子储存阳极的性能受到内在应力的限制.
- 在电极材料中有效的应力管理至关重要,但经常被忽视.
研究的目的:
- 为超快速和耐用的离子阳极提出并展示一种新的应力消散策略.
- 设计和制造二元Mo/Fe硫化物异构纳米棒,用于增强离子储存.
主要方法:
- 制造二元的Mo/Fe硫化物异构结构的纳米棒,具有分阶梯式悬臂配置.
- 使用多物理模拟来理解压力消散机制.
- 电化学性能和周期稳定性的实验验证.
主要成果:
- 异构的纳米棒通过微尺度的多接口内置电场 (BEF) 和宏观尺度的架构结构表现出应力消散.
- 在10.0 A g-1下实现了332.8 mAh的高速率能力.
- 在5.0 A g-1下,经过900多个周期的耐用周期稳定性.
结论:
- 拟议的多接口BEF和架构结构策略显著提高了基于转换的阳极的稳定性和动力学.
- 这种方法为开发高性能和持久的离子电池阳极提供了新的途径.
- 在速度能力和循环寿命方面表现优于其他金属化物.
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