高性能可充电电池的3D复合电流采集器
Jian Zhou1, Yuming Chai1, Jie Zhu1
1Beijing National Laboratory for Molecular Science, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China.
ACS applied materials & interfaces
|August 25, 2025
概括
研究人员开发了一种用于 (Mg) 金属电池的新型3D铜涂层碳 (Cu@CC) 电流收集器. 这项创新促进了均的沉积,大大提高了电池周期寿命和下一代储能安全性.
科学领域:
- 材料科学
- 电化学
- 能量储存
背景情况:
- (Mg) 金属电池对于高能量密度的可充电应用至关重要.
- 不均的沉积导致电池的循环寿命缩短和安全问题.
- 开发先进的电流采集器对于稳定的Mg金属阳极性能至关重要.
研究的目的:
- 设计一个三维 (3D) 电流采集器,以实现均的沉积.
- 提高Mg金属电池的循环稳定性和安全性.
- 推进高能量密度Mg电池的实际应用.
主要方法:
- 通过无电涂层使用铜涂碳布 (Cu@CC) 制造3D电流采集器.
- @CC复合结构的孔隙性和性特性.
- 用Cu@CC电流采集器和全电池对Mg金属阳极进行电化学测试.
主要成果:
- 3D Cu@CC电流采集器表现出均的沉积,达到2000多个周期,平均库伦比效率 (CE) 为99.84%.
- 增强了Cu@CC的阳极分离器兼容性,可实现超过2000个周期,平均CE为99.35%.
- 完整细胞 (Mg@Cu@CC//Mo6S8) 显示出极好的循环稳定性,在1200个循环后保持97. 2%的容量,而囊细胞在300个循环后保持92. 9%.
结论:
- 开发的3D Cu@CC电流采集器有效应对不均的沉积的挑战.
- 这一进步显著提高了Mg金属电池的循环性能和库伦比效率.
- 这些发现为高能量密度Mg金属电池的实际实现提供了关键的见解.
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