没有阳极的金属囊细胞使用Cu3P纳米线在现场生长在电流收集器上
Wu Zhang1,2, Jiale Zheng1, Ziang Ren1
1College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou, 310014, China.
Advanced materials (Deerfield Beach, Fla.)
|January 4, 2024
概括
无阳极金属电池通过一种新型的铜化物纳米线基板实现高能量密度. 这种材料增强了沉积的均性,显著提高了循环稳定性和电池寿命.
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:
- 无阳极金属电池 (AFSMB) 的能量密度很高,但由于不均的沉积,它们的循环稳定性很差.
- 这种不稳定性导致产能下降,限制了AFSMBs的实际应用.
研究的目的:
- 为AFSMBs开发一个稳定高效的阳极基板.
- 研究改善沉积和循环性能背后的机制.
主要方法:
- 铜化物 (Cu3P) 纳米线在铜电流收集器 (Cu3P@Cu) 上在现场生长.
- 在不对称和对称细胞中对Cu3P@Cu进行电化学测试.
- 低温传递电子显微镜和第一原则计算来分析沉积行为.
主要成果:
- Cu3P@Cu阳极表现出极好的稳定性,在不对称的电池中,在800个循环中达到99.8%的平均库伦比效率.
- 具有Cu3P@Cu的对称细胞超过2000小时的稳定循环.
- 计算显示Cu3P的低Na+吸收和扩散能量障碍,促进均的核和沉积.
结论:
- Cu3P@Cu基质有效地解决了AFSMB中不均的沉积的挑战.
- 这种材料显著提高了自行车的稳定性和寿命,为实际的AFSMB应用铺平了道路.
- 一个完整的袋式电池显示出相当大的循环容量,验证了这种阳极设计的实际可行性.
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