为固态电池制造LLZO复合阴极的直接前体路线
Vivien Kiyek1,2, Christian Schwab1, Walter Sebastian Scheld1
1Institute of Energy Materials and Devices-Materials Synthesis and Processing (IMD-2), Forschungszentrum Jülich GmBH, 52425, Jülich, Germany.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|September 19, 2024
概括
一种新的一步方法直接在复合电极中合成,,氧化 (LLZO) 石榴石电解质. 这简化了更安全的固态电池的制造,降低了能源和时间成本.
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
- 固态化学 固态化学
背景情况:
- 使用,,氧化 (LLZO) 石榴电解质的固态电池与传统的离子电池相比,提供了更高的安全性和强度.
- 这些电池的陶复合材料正极大规模生产受到复杂的多步制造工艺的阻碍.
研究的目的:
- 为LLZO/LiCoO2 (LCO) 复合阴极开发一个简化的一步制造路线.
- 为了使LLZO电解质与复合电极制造同时进行直接合成.
- 利用具有成本效益的前体和成熟的工业工艺,如造磁带.
主要方法:
- 一种新的单步合成方法,用于直接在LCO复合体内对Al,Ta-dopedLLZO进行合成.
- 使用的金属氧化物前体 (LiOH,La2O3,ZrO2,Al2O3,Ta2O5) 被加热到1050°C.
- 采用不同组成的泥的顺序造,以创建渐变微观结构.
主要成果:
- 在LCO的存在下直接成功形成纯相LLZO,消除了LLZO粉末的预合成.
- 实现了带有梯度微结构的密集,平坦的复合材料阴极,防止离子间扩散和二次相形成.
- 制造的独立阴极 (厚度85微米,相对密度95%) 具有15毫克的LCO负载,初始容量为82 mAhg-1.1.
结论:
- 一步合成路线显著简化了用于固态电池的LLZO/LCO复合阴极制造.
- 开发的方法与工业磁带造兼容,并使用廉价的前体.
- 由此产生的阴极表现出与传统方法相比的性能,并为未来的改进提供了潜力.
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