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增强稳定性和6C快速充电在μSi下载 LiNi0.8Co0.1Mn0.1O2 离子电池使用具有多个键的导电结合剂
Jiaxin Chen1, Kangjia Hu1, Zhangci Wang1
1State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China.
Small (Weinheim an der Bergstrasse, Germany)
|December 26, 2024
概括
一种新的混合粘合剂增强了高能离子电池的微型阳极,使其能够稳定循环和快速充电. 这一突破解决了的解决方案.
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:
- 微型 (μSi) 阳极为离子电池 (LIB) 提供高能量密度,但在体积扩张方面面临挑战,导致容量衰减和低速率性能.
- 现有的结合剂在化过程中难以适应μSi阳极的显著体积变化,这阻碍了它们的实际应用.
研究的目的:
- 开发一种用于μSi阳极的新型混合粘合剂,可以减轻体积膨胀并提高电化学性能.
- 为了提高使用μSi阳极的高能LIB的稳定性,循环性和速率能力.
主要方法:
- 用于μSi阳极的交叉连接导电网络和多个键的混合结合剂的制造.
- 使用开发的粘合剂对μSi阳极和全细胞进行电化学表征.
- 结合剂衍生的固体电解质间相 (SEI) 和电极结构完整性的分析.
主要成果:
- 混合粘合剂表现出多层次的协同效应,包括强大的粘合剂衍生SEI和减轻电极粉碎的网络.
- 微Si阳极表现出极好的速率性能,在12 A g-1时达到1481.3 mAh g-1并在20 A g-1时保持960.5 mAh g-1.
- 一个 μSi 能处理的 LiNi0.8Co0.1Mn0.1O2 (NCM811) 完整的电池显示了令人印象深刻的容量 (145.8 mAh g-1在6C) 和高库伦比效率.
结论:
- 开发的混合绑定器有效地解决了μSi阳极的体积扩张问题,使长期循环和优越速率能力成为可能.
- 这项研究为推进具有快速充电和稳定的循环性能的高能LIB提供了一个有前途的战略.
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