拓式Li-SbF3@Cu合金阳极用于高能量密度金属电池
Jiaqi Cao1, Yuansheng Shi1, Dilxat Muhtar1
1School of Materials, Sun Yat-sen University, Shenzhen, 518107, P. R. China.
Advanced materials (Deerfield Beach, Fla.)
|April 24, 2025
概括
研究人员开发了一种新型超薄的-三化铜 (Li-SbF3@Cu) 阳极,用于高能可充电金属电池. 这种先进的阳极能够实现稳定的循环和高利用率,为实际应用铺平了道路.
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:
- 超薄的 (Li) 合金阳极 (≤50μm) 对于可充电的金属电池至关重要,因为与纯阳极存在挑战.
- 高的利用对于实际的,高能量密度的应用是必不可少的.
研究的目的:
- 开发一种可控制厚度 (≈5.5-30μm) 的Li-SbF3@Cu阳极.
- 为了增强沉积/溶解和/电解质接口进化,用于高能量密度的金属电池.
主要方法:
- 一个拓式Li-SbF3@Cu阳极的制造,其中嵌入了基于Li的双合金 (Li3Sb和Li-Cu) 和一个富含LiF的外层.
- 用LiCoO2阴极对称细胞和全细胞的电化学测试.
主要成果:
- -SbF3@Cu阳极在1 mA cm-2/1 mAh cm-2.2时表现出稳定的循环运行超过1200小时.
- 在2 mA cm-2/3 mAh cm-2.2时实现了53.6%的超高放电/充电深度.
- 一个完整的电池提供了394.5Wh kg-1的能量密度,在低N/P比1.5.5的情况下具有令人印象深刻的循环可逆性.
结论:
- 富含LiF的层,性Li3Sb位点和Li-Cu骨架的协同效应有效地调节了Li沉积和接口演变.
- 开发的阳极为高利用度合金阳极在实际高能量密度金属电池中的工业应用提供了有前途的途径.
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