碳纳米复合材料中间层中银颗粒分布对无阳极全固态电池中涂层的影响
Michael Metzler1,2, Christopher Doerrer1,3, Yige Sun1,2
1Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, U.K.
ACS applied materials & interfaces
|June 26, 2025
概括
研究人员开发了一种新的喷涂印刷的银/碳黑双层,用于固态电池. 这一进步提高了金属阳极涂层的均性,提高了电池循环性能和下一代能源存储的效率.
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:
- 固态电池与离子电池相比,提供更高的能量密度,特别是金属阳极.
- 与金属阳极相关的制造挑战阻碍了它们的广泛采用.
- 无阳极的电池绕过了直接的金属阳极制造,但由于不均的涂层和剥离,其循环稳定性不佳.
研究的目的:
- 解决无阳极固态电池中不统一的涂层和剥离问题.
- 开发一个改进的中间层,促进同质沉积,提高循环性能.
- 研究一种新型喷涂印刷纳米复合材料双层用于金属阳极稳定性的有效性.
主要方法:
- 喷涂印刷的纳米复合材料双层的制造,由银/碳黑 (Ag/CB) 作为中间层组成.
- 在阳极电流收集器和Li$_{6}$PS$_{5}$Cl固体电解质之间集成Ag/CB双层.
- 使用二次离子质谱 (SIMS) 成像对涂层均性的表征.
- 使用高Ni氧化物阴极的固态电池的电化学性能测试.
主要成果:
- 与以前的Ag/CB混合物相比,开发的Ag/CB双层间层促进了显著更为均的阳极涂层.
- 结合双层的固态细胞表现出增强的循环稳定性和改善的库伦比效率.
- 电池实现了超过190mAh/g的初始放电容量,并在100个循环中保持了高于98%的库伦比克效率.
结论:
- 结构化的Ag/CB中间层有效地减轻了不均的涂层,这是无阳极固态电池的关键挑战.
- 这种喷涂印刷的双层方法为改善下一代固态电池的循环寿命和效率提供了一个有希望的策略.
- 板的增强统一性直接导致了观察到的电池性能改善.
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