在高性能离子储存中,通过调节活性碳的孔结构
Yan-Ru Tian1,2, Zong-Lin Yi1, Fang-Yuan Su1
1CAS Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, Shanxi 030001, China.
ACS applied materials & interfaces
|March 27, 2024
概括
研究人员开发了一种新方法,在离子电池的活性碳阳极中创建受限孔. 这一战略提高了储能和初始库伦比克效率 (ICE),克服了以前的局限性.
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:
- 碳阳极中孔隙结构对于储存能力至关重要.
- 设计受限孔是一个关键的策略,但往往会损害容量和初始库伦比效率 (ICE).
研究的目的:
- 开发一种用于调节活性炭 (AC) 孔隙结构的新方法,同时实现高容量和ICE.
- 为了提高碳阳极的电化学性能,用于离子储存.
主要方法:
- 使用液态的重复浸和预碳化方法来修改活性炭 (AC).
- 采用毛细管凝聚,使浸入AC孔中,然后碳化形成纳米孔 (<1nm).
主要成果:
- 制造的材料 (XA-4T-1300) 显示了高ICE的91.1%和383.0mA的容量hg-1在30mAg-1.1.
- 在300个循环后在1Ag-1下实现了95.5%的优异容量保留,这是由于有序的碳层提高了导电性.
- 成功创建了许多直径小于1纳米的孔隙,改善了储存.
结论:
- 重复浸和预碳化方法有效调节孔隙结构,以增强离子储存.
- 这种方法提供了一种实际的策略,以提高碳阳极的容量和ICE.
- 该研究强调了孔隙结构工程对于高性能离子电池的重要性.
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