在无形碳阳极的高速公路建设使10C快充离子电池成为可能
Haizhou Liu1, Ying Xu1, Shuhao Xiao1
1CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, Beijing National Laboratory For Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, P. R. China.
Angewandte Chemie (International ed. in English)
|February 3, 2026
概括
研究人员为离子电池 (SIB) 开发了一种新的无形碳阳极,可实现10C快速充电. 这一突破克服了扩散限制,为下一代动力系统的超快充铺平了道路.
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) 的常规硬碳电池具有高容量,但由于离子扩散路径曲折,因此充电速度较慢.
- 带有闭孔的无序碳结构限制了离子 (Na+) 的可访问性.
研究的目的:
- 为超快速充电SIBs开发具有增强Na+运输的无形碳 (AC) 阳极.
- 为了克服现有的SIB阳极材料的速率能力限制.
主要方法:
- 采用分子交叉连接策略,将相互连接的碳板与大层间距嵌入到无序的碳矩阵中.
- 这创造了"Na+高速公路",以促进直接的离子运输.
- 交流阳极在1000 mAh袋装满电池中进行了评估.
主要成果:
- 优化的交流阳极在10C速率下达到298mAhg-1的特定容量.
- 囊中充满的电池在6分钟内显示了92%的充电状态.
- 观察到卓越的循环稳定性,在1000个循环中保持94%的容量.
结论:
- 开发的配有"Na+高速公路"的交流阳极有效地减轻了扩散电阻,使SIB中的高速性能成为可能.
- 这一战略释放了交流电在超快充应用中的潜力.
- 这些发现为新电力系统的频率控制中的实用SIB铺平了道路.
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