自选 (220) 定向成长的铜电流采集器设计,用于循环稳定的无阳极金属电池
Jun Zhan1, Lequan Deng2, Yaoyao Liu2
1Institute for Advanced Interdisciplinary Research (IAIR), University of Jinan, Jinan, 250022, P. R. China.
Advanced materials (Deerfield Beach, Fla.)
|December 16, 2024
概括
研究人员开发了一种用于无阳极金属电池 (ALLMB) 的新型铜电流采集器 (CuCC). 这种CuCC促进了统一的沉积,提高了电池性能和稳定性,用于先进的能量存储.
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:
- 没有阳极的金属电池 (ALLMB) 具有高能量密度,但在铜电流采集器 (CuCC) 上存在不稳定的固体电解质间相 (SEI).
- 在CuCC上不均的沉积/剥离导致可逆性差,并限制ALLMB的性能.
- 设计CuCC以通过无机丰富的SEI (iSEI) 形成促进均沉积至关重要,但尚未充分探索.
研究的目的:
- 开发一种新型的CuCC,这种CuCC是盐-性,并催化形成一种富含无机物SEI (iSEI).
- 研究一种自我选择的CuCC设计策略,可以增强盐的吸附和分解.
- 为了提高没有阳极的金属电池的coulombic效率和循环稳定性.
主要方法:
- 在电沉积过程中使用盐作为表面控制剂制造了一种自我选择的CuCC.
- 这一过程引导了Cu220) 面的单向生长,被确定为最盐爱好面.
- 在ALLMB中通过涂/剥离试验和长期循环测试来评估修改后CuCC的性能.
主要成果:
- 自选的Cu220) 面显著促进了盐吸附和iSEI的形成.
- 涂/剥离的库伦比效率从99.25%提高到99.50%,在400个循环中保持稳定.
- 在100个周期内,ALLMB的容量衰变率降低了42.4%,在袋细胞中证明了可大规模生产的CuCC.
结论:
- 成功开发了一种新的自我选择和iSEI催化CuCC设计策略.
- 220) 面在增强盐相互作用和SEI形成中发挥着关键作用,以实现均沉积.
- 这种方法为开发高性能和稳定的无阳极金属电池提供了有希望的途径.
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