对于离子电池的基于基硬碳阳极的深氧交叉连接和自我涂层协同工程
Ke Xiao1, Peiyao Wang2, Jin Bai2
1Key Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031 People's Republic of China; University of Science and Technology of China, Hefei 230026 People's Republic of China.
Journal of colloid and interface science
|February 3, 2025
概括
研究人员从低软化点的场开发了一种无序的硬碳阳极,用于离子电池. 这种材料具有出色的储存能力和循环稳定性,克服了传统石墨结构的局限性.
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:
- 低软化点度 (LP) 是离子电池中硬碳阳极的具有成本效益的前体.
- 在LP衍生碳中的高石墨化限制了它们的储存性能.
研究的目的:
- 从LP前体开发出一种无序的硬碳阳极材料,具有增强的储存特性.
- 通过控制其结构和导电性来提高硬碳阳极的电化学性能.
主要方法:
- 使用了协同的深度预氧化和自我涂层策略.
- 引入了氧交联结构,以阻碍石墨化和增加层间间距.
- 应用软碳自我涂层来增强电导率和扩散.
主要成果:
- 开发的自我涂层硬碳 (HC@SC) 呈现出一个无序的结构,层间间距较大.
- 在0.05 A g-1下,HC@SC阳极实现了311.9 mAh g-1的初始充电容量.
- 在1000个循环后,在1 A g-1下显示了90.0%的高容量保留,并且在5 A g-1下显示了良好的速率能力 (109.7 mAh g-1).
- 全细胞NNMO//HC@SC显示了理想的循环稳定性和速度性能.
结论:
- 协同策略有效地产生了适合离子电池的无序硬碳结构.
- HC@SC阳极为高性能离子电池应用提供了一个有前途的解决方案.
- 这种方法通过改善结构障碍和电导率来增强储存.
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