桥接捐赠体连接体使离子电池的超稳定石墨阳极成为可能
Bingyan Song1, Zhifen Luo1, Xi Liu1
1Confucius Energy Storage Lab, School of Energy and Environment & Z Energy Storage Center, Southeast University, Nanjing, Jiangsu, 211189, China.
Angewandte Chemie (International ed. in English)
|July 30, 2025
概括
研究人员开发了桥梁捐赠者连接体,以增强离子电池 (SIB) 的石墨阳极. 这种方法提高了结构稳定性和循环性能,使长期持久和高效的储能解决方案成为可能.
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:
- 石墨是离子电池中常见的阳极,因为它的稳定性和成本.
- 石墨的有限间歇性质阻碍了其在离子电池 (SIB) 中的使用.
研究的目的:
- 为了提高SIB中的石墨阳极性能.
- 为了克服石墨结构中离子介质的局限性.
主要方法:
- 引入了桥接捐体连接体,以创建连接体通道.
- 使用二胺胺 (NaDCA) 作为模型连接体扩展石墨层间距.
- 研究了三元石墨间化合物 (t-GICs) 的结构强度.
主要成果:
- 证明了由二胺胺离子 (DCA-) 促进的丰富的连接体通道的形成.
- 在SIB中,在5000个周期后,实现了超过94%的容量保留.
- 保持了超过99.8%的平均库伦比克效率 (CE).
结论:
- 桥梁-捐赠者-连接剂策略显著提高了SIBs的石墨阳极结构完整性.
- 这种多功能机制显示出在其他金属离子电池电解质中应用的潜力.
- 开发的方法为高性能和耐用的离子电池提供了一个有希望的途径.
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