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在Ni-丰富的阴极活性材料上涂覆坚固的层,同时抑制全固态离子电池的阳离子混合

Sunmin Kim¹, Minji Kim¹, Miju Ku¹

¹Department of Mechanical Convergence Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea.

|August 27, 2024

概括

闪光灯烧结迅速在富含的阴极活性材料 (CAM) 上形成保护性兰酸 (LLTO) 层. 这种方法可以防止降解,并提高所有固态离子电池的性能.

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:

硫化物固体电解质和丰富的正极活性物质 (CAM) 之间的不兼容性阻碍了全固态离子电池的开发.
保护层对于减轻接口反应和提高电池稳定性至关重要.
lanthanum titanate (LLTO) 提供化学稳定性和离子导电性,但传统合成需要高温,导致有害的副作用.

研究的目的:

开发一种快速有效的方法,在丰富的CAM上创建保护性LLTO层.
为了应对高温合成的挑战,包括聚合,二次相形成和阴离子混合.
通过解决电解质-阴极不兼容性来提高全固态离子电池的性能.

主要方法:

使用快速烧结技术的闪光烧结 (FLS) 来制造LLTO保护层.
涂层的LiNi_0.8Co_0.1Mn_0.1O₂ (NCM811) 与LLTO.有着不同的颜色.
在FLS处理后分析了LLTO涂层NCM811的结构完整性和化学成分.

主要成果:

在NCM811.11上,FLS处理成功地产生了均且纯矿LLTO保护层.
在FLS方法中,可以将NCM811阴极活性物质内的阴离子混合最小化.
被LLTO涂层的NCM811呈现出完全覆盖的密集层,导致初始容量很高,并解决了不兼容性问题.

结论:

闪光烧结是一种可行的快速技术,用于制造富含Ni的CAM上的LLTO保护层.
这种方法有效地克服了传统高温烧结的局限性.
FLS方法为先进的电池材料提供了更广泛的应用潜力,这些材料以前受到加工温度的限制.

关键词:

丰富的阴极活性物质是的活性物质.全固态离子电池完全固态离子电池化混合混合化混合闪光灯烧结的方法 lanthanum titanate 的使用方法保护层是一种保护层.

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