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通过三维铜泡实现Zn-离子电池的长周期使用寿命
Taşkın Çamurcu1,2, Erhan Demirbaş1, Mehmet Nurullah Ateş3,2
1Gebze Technical University, Department of Chemistry, 41400 Gebze, Kocaeli, Türkiye.
ACS applied materials & interfaces
|April 25, 2024
概括
本研究介绍了一种新的,具有成本效益的铜泡电流采集器,用于水性离子电池 (ZIB). 新设计增强了沉积和剥离,提高了电池循环稳定性和效率.
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:
- 水性离子电池 (ZIB) 中的金属阳极面临着诸如树突生长,低库伦比效率和高极化等挑战.
- 使用商业铜泡 (CCuF) 等当前收集器,但受到厚度,表面积和成本的限制.
研究的目的:
- 为ZIBs开发具有成本效益的电流采集器,具有较大的表面积.
- 为了提高水性ZIB的循环性能和效率.
主要方法:
- 用动态泡模板 (DHBT) 方法制造的3D多孔CuF电流采集器合成涂CuF阳极 (Zn/CuF).
- 用 α-MnO2 阴极在对称细胞和全细胞中对 Zn/CuF 阳极进行电化学测试.
主要成果:
- 通过DHBT方法,在几秒钟内制造出薄 (∼38微米) 铜泡 (CuF5),具有出色的导电性和开放孔隙结构.
- Zn/CuF 阳极表现出均的 Zn 沉积/剥离,快速的动力学,低极化,以及在 500 小时内高达 99% 的高平均库伦比效率.
- 对称电池显示稳定的电压概况1000小时,和完整的电池实现了266mAh的容量g-1在0.1Ag-1和94mAhg-1在2Ag-1超过200个周期,接近99.9%的库伦比效率.
结论:
- 通过DHBT方法合成的CuF电流收集器为稳定和高效的水性ZIB提供了一个有希望的,具有成本效益的解决方案.
- 改进的阳极设计有效地减轻了与ZIB中的金属阳极相关的常见问题.
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