高质量载荷丰富的阴极电极设计,采用多维碳导电添加剂,以最大限度地减少高性能离子电池的欧姆电阻
Kashif Saleem Saqib1, Jae Hong Choi1, Sungwoo Park1
1Department of Smart Green Technology Engineering, Pukyong National University, 45, Yongso-road, Nam-gu, Busan 48547, Republic of Korea.
ACS applied materials & interfaces
|August 18, 2025
概括
研究人员通过向NCM811阴极添加双碳材料来增强高容量的离子电池. 这提高了导电性和孔隙性,提高了能源密度和性能,以实现可持续的能源存储.
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:
- 离子电池 (LIB) 对可持续能源至关重要,对高容量,富含的阴极的需求正在增加.
- 高质量负载电极是提高LIB能量密度的关键,但由于电子/离子传输差,它们在速率能力方面面临挑战.
- 在高质量负载电极中,活性材料的不足利用和极化极限性能的增加.
研究的目的:
- 为了优化丰富的LiNi0.8Co0.1Mn0.1O2 (NCM811) 阴极电极的微结构特性.
- 通过量身定制的导电添加剂,增强高质量负载电极中的电子传输和离子扩散.
- 改进基于NCM811的LIBs的电化学性能和能量密度.
主要方法:
- 将多维碳导电添加剂,特别是碳黑 (CB) 和碳纳米纤维 (CNF) 纳入NCM811阴极配方.
- 在高质量负载电极内精确定制导电网络和多孔特性 (大约. 23 毫克 厘米-2).
- 电化学性能评估,包括在1°C的100个周期内保持容量,在0.2°C的性能.
主要成果:
- 采用双碳添加剂 (CB + CNF) 的NCM811阴极表现出色,在1C时100个循环中保持94.8%的容量.
- 长结构的CNF被发现在厚厚的,高质量负载电极中对高效的导电网络做出了重大贡献.
- 通过双碳系统进行微结构优化,有效降低了欧米接触电阻,从而提高了电化学性能.
结论:
- 双碳系统 (CB + CNF) 的集成可以协同增强导电网络,并优化NCM811阴极中的电极孔隙.
- 这种微结构工程方法是提高高质量负载LIB电极性能的一个简单但基本的原则.
- 该研究强调了一种可行的策略,用于推进下一代商业应用离子电池的能量密度和速率能力.
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