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在硬碳阳极中依赖微结构的储存机制

Luis Kitsu Iglesias¹, Samuel D Marks², Nikhil Rampal^3,4

¹Department of Chemical and Biological Engineering, University of Colorado Boulder, Boulder, CO, 80309, USA.

Small (Weinheim an der Bergstrasse, Germany)

|May 30, 2025

概括

离子电池中的硬碳阳极在高电位和低电位区域中以不同的方式储存,受微观结构的影响. 设计这些结构是提高电池性能以实现可持续能源存储的关键.

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:

可持续的能源储存对于可再生能源的整合至关重要.
离子电池 (NIB) 为电网规模的存储提供了一个可持续且具有成本效益的替代方案.
硬碳 (HC) 是NIB的有希望的阳极材料,但其复杂的结构阻碍了对储存的理解.

研究的目的:

阐明硬碳微结构对NIBs中储存机制的影响.
为了区分NIBs的高潜力 (斜坡) 和低潜力 (高原) 区域的储存行为.
提供对微结构工程的见解,以提高HC阳极性能.

主要方法:

进行X射线总散射实验,探测原子结构.
密度函数理论 (DFT) 计算以建模相互作用.
分析不同潜在地区的储存机制.

主要成果:

在斜坡区域,最初与缺陷部位结合,然后在石墨烯层之间插入.
最初的不可逆转性与表面缺陷和固体电解质接口 (SEI) 形成的捕获有关.
在高原地区,会插入并填充毛孔,集群大小取决于毛孔大小和缺陷度.

结论:

硬碳微结构显著决定了NIB中的储存机制和性能.
了解缺陷部位,孔隙结构和层间距离对于优化HC阳极至关重要.
硬碳的微结构工程对于推进用于电网规模应用的NIB技术至关重要.

关键词:

在 DFT 模拟中使用 DFT 模拟.离子电池是一种离子电池.在X射线中,总散射是X射线的总散射.缺陷辅助的插入间隔是有缺陷的.硬碳是一种硬的碳.纳米孔是一种纳米孔.

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