双连续结构介导硬碳的微结构工程,用于增强储存
Chen Tang1,2, Wenwei Zhang3, Yixiao Zhang1
1State Key Laboratory of Synergistic Chem-Bio Synthesis, School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, In situ Center for Physical Sciences, and Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China.
Advanced materials (Deerfield Beach, Fla.)
|October 29, 2025
概括
具有独特微观结构的工程硬碳阳极显著提高离子电池的性能. 这一创新提高了容量,速度能力,并实现了储能应用的特殊循环稳定性.
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:
- 离子电池 (SIB) 为离子电池提供了一个低成本的替代品.
- 目前的SIB面临着周期稳定性和利率表现不佳等挑战.
- 硬碳是有前途的阳极,但需要微观结构优化.
研究的目的:
- 开发一种先进的硬碳阳极,以提高SIB性能.
- 为了解决高不可逆转的容量损失和低动力学的局限性.
- 研究微结构工程对储存的影响.
主要方法:
- 一个具有单个原始 (SP) 微观结构 (SP-HC) 的双连续中孔硬碳的合成.
- 微观结构特征分析孔隙结构和层间间距.
- 电化学测试用于评估容量,速率性能和循环稳定性.
主要成果:
- 该SP-HC阳极显示增加了储存地点的密度和可访问性.
- 观察到增强的碳乱和扩大的层间间距.
- 实现了特殊的速率性能 (172 mAh g-1 在10 A g-1 时) 和前所未有的周期稳定性 (80 mAh g-1 在10 A g-1 时100,000 个周期后).
结论:
- 微结构工程对于优化SIB中的硬碳阳极至关重要.
- 该SP-HC设计显著提高了储能和动力学.
- 这项工作为SIBs的硬碳阳极的循环稳定性设定了新的基准.
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