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化前策略,设计用于离子电池的高性能氧化阳极

Wei Sun¹, Zeyang Li¹, Dazhi Li¹

¹College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, Shandong, P. R. China. zhenjiangli@qust.edu.cn.

|February 6, 2024

概括

预化策略增强氧化 (ZnO) 阳极用于储能,提高循环容量和稳定性. 这种方法提高了电子导电性,并抑制了体积膨胀,以获得更好的性能.

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
储能储能储能储能储能储能

背景情况:

氧化 (ZnO) 是一个有前途的,低成本的阳极材料用于储能.
它的实际应用受到循环容量差以及反应期间体积膨胀的限制.

研究的目的:

为了提高 ZnO 阳极的电化学性能.
为了提高循环稳定性和容量保留,先进的储能设备.

主要方法:

使用预化策略,通过固态反应产生预化ZnO (Li-ZnO).
射线光电子光谱 (XPS) 和拉曼光谱证实了成功的前化.
电化学测试评估了容量,循环稳定性和运动性质.

主要成果:

在没有碳涂层的情况下,预化Li-ZnO表现出增强的电子导电性.
5mol%的Li-ZnO在0.1Ag-1.1的200个循环后达到639mAhg-1的可逆容量.
高容量保留 (380 mA h g−1) 在1.0 A g−1的1440个周期后保持,具有显著的伪容量贡献 (72.5%).

结论:

前化策略通过提高导电性和抑制体积膨胀,有效地提高了ZnO阳极性能.
这种方法加速了离子扩散和电荷转移动力学,这对于稳定的能量储存至关重要.
预化是开发高性能,稳定的阳极材料的可行策略.

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