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一个环形金属阳极使高性能全固态电池成为可能,现场L频段EPR成像揭示了这一点

Jiaxing Lv¹, Ying Jiang¹, Guozhong Lu¹

¹Shanghai Key Laboratory of Magnetic Resonance, Institute of Magnetic Resonance and Molecular Imaging in Medicine, School of Physics and Electronic Science, East China Normal University, Shanghai 200062, P. R. China.

The journal of physical chemistry letters

|January 20, 2025

概括

一种新的环形金属阳极 (LMA) 显著提高了全固态金属电池 (ASSLMB) 的循环性. 这种设计减少了树石的形成,提高了电池的性能和寿命.

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
电池技术电池技术

背景情况:

全固态金属电池 (ASSLMB) 是下一代能源存储的前景.
在ASSLMB中,传统的圆盘金属阳极 (LMA) 周期寿命有限 (<150个周期),容量保持不佳.
树的生长是LMAs的主要失败机制.

研究的目的:

开发一种新的环形金属阳极 (LMA),以提高ASSLMB的循环和性能.
为了研究LMA几何学对树形成的影响.
证明L频段电子偏磁共振成像 (EPRI) 在研究ASSLMBs时的实用性.

主要方法:

使用新型环形LMA制造ASSLMB.
用LiCoO2阴极和Li6PS5Cl电解质对全细胞进行电化学循环试验.
在现场L频段电子磁共振成像 (EPRI) 观察树的生长.

主要成果:

带有环形LMA的完整细胞在300个循环后在0.3C下保持了83.65%的出色容量保留.
与传统设计相比,现场L频段EPRI在环形LMA上显著减少了树形成.
环形LMA设计有效地减轻了树的传播,提高了电池的稳定性.

结论:

金属阳极的形状是提高ASSLMB的性能和寿命的关键因素.
环形LMA提供了一种有前途的策略,可以抑制树的生长,并提高电池的循环利用性.
L频段EPRI是一种有价值的现场技术,用于理解和诊断ASSLMB中的故障机制.

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