用于高稳定无阳极电池的谷物优化铜电流采集器
Yujie Chen1, Huan Li1, Shuibin Tu1
1School of Chemical Engineering, The University of Adelaide, Adelaide, South Australia, Australia.
Advanced materials (Deerfield Beach, Fla.)
|January 7, 2026
概括
具有高粒度边界密度的工程铜基板通过促进稳定的涂层和强大的固体电解质介相 (SEI) 来改善无阳极电池. 这提高了循环稳定性和容量保留,用于实际应用.
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:
- 无阳极电池 (AFSB) 具有高能量密度,但由于不稳定的涂层/脱落和固体电解质介相 (SEI) 演变而面临挑战.
- 提高循环稳定性和容量保留对于AFSB的实际应用至关重要.
研究的目的:
- 调查铜 (Cu) 基板中谷物边界密度对AFSB性能的影响.
- 阐明谷物边界在增强核和SEI形成中的作用.
主要方法:
- 制造具有不同粒度边界密度的Cu基板.
- 使用改性Cu基板和Na3V2(PO4) 3阴极对无阳极电池进行电化学测试.
- 对沉积形态和SEI组成的分析.
主要成果:
- 较高的谷物边界密度的Cu基质表现出更强的亲和力和较低的核化能量障碍,导致密集的晶体沉积物.
- 颗粒边界促进了离子吸附,形成了富含离子的溶解结构和稳定,富含NaF的SEI膜.
- 具有超高粒边密度Cu (UGB-Cu) 的无阳极电池在5°C下实现了800个周期,平均库伦比效率为99.97%.
结论:
- 在Cu基板中的粒度边界在改善基板-亲和和界面SEI化学方面发挥着双重作用.
- 薄膜的粒度边界工程是开发高性能AFSB的实用和可扩展的策略.
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