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Updated: Feb 10, 2026

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Quantitative Hardness Measurement by Instrumented AFM-indentation
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通过对硬碳孔的定量工程来实现超过200Wh kg-1的离子囊细胞
Zhihao Chen1, Jialong Shen1, Wenjie Deng1
1Hefei National Research Center for Physical Sciences at the Microscale, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Department of Materials Science and Engineering, CAS Key Laboratory of Materials for Energy Conversion, University of Science and Technology of China, Hefei 230026, China.
National science review
|February 9, 2026
概括
我们通过控制孔径大小,增强储存和能量密度来优化离子电池 (SIB) 的硬碳阳极. 这种具有成本效益的策略可以提高SIB在电网规模应用中的性能.
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 (SIB) 由于其成本效益和无性质,对电网规模的存储充满希望.
- SIB中的硬碳 (HC) 阳极存在不清楚的结构性能关系,限制了它们的电化学性能.
研究的目的:
- 优化硬碳阳极结构,以提高SIB中的储能和电化学性能.
- 建立硬碳的孔隙结构与其储存能力之间的明确相关性.
主要方法:
- 采用了脂辅助的孔隙促进策略,以精确控制硬碳中闭孔的含量和大小.
- 使用小角度X射线散射 (SAXS) 来量化储存的有效孔积.
- 优化HC阳极的电化学性能在袋式SIB中进行了评估.
主要成果:
- 优化闭孔大小 (约2纳米) 显著提高了HC中Na集群填充体积分数.
- 优化的HC表现出延长的低电位平原 (<0.1V与Na+/Na相比) 和增加的储能.
- 使用优化HC的SIB实现了高能量密度 (202Wh/kg) 和出色的循环稳定性 (>500个循环后80%的保留率).
结论:
- 控制闭孔大小对于改善SIB中硬碳阳极的电化学性能至关重要.
- 该研究展示了一种具有成本效益的方法,用于生产高级HC材料,用于高性能,电网规模的离子电池.
- 这项研究为低成本,高能量密度的SIB铺平了道路.
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