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Yifan Deng¹, Hongcheng Li¹, Yuekai Yan¹

¹Science and Technology on Thermostructural Composite Materials Laboratory, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, P. R. China.

|April 3, 2024

概括

研究人员开发了一种用于可充电水性离子电池 (ZIB) 的新型铁酸盐阴极. 这种材料具有高放电电压,增强的稳定性和独特的自我充电能力,显示了先进的能量存储的巨大潜力.

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:

可充电的水性离子电池 (ZIB) 对于安全和经济高效的能源存储至关重要.
聚离子阴极材料为ZIBs提供高电压,稳定性和可负担性.

研究的目的:

为ZIBs合成和描述一种新的四边形Na2VOP2O7阴极材料.
为了研究 Zn-hydroxyapatite (ZnHAP) 表面修饰对正极性能的影响.
为了探索修改后的阴极的自我充电行为.

主要方法:

索尔凝方法用于合成四角形Na2VOP2O7.7.
ZnHAP对阴极的表面进行修改.
电化学测试包括速率能力,循环性能和自我充电分析.

主要成果:

Na2VOP2O7阴极显示出1.8V的放电平台电压,具有良好的速率和循环性能,归因于酸盐诱导效应.
通过抑制离子水解,ZnHAP修改提高了19%的容量,并改善了100个循环后的容量保留.
修改后的阴极表现出自我充电效应,恢复了最初容量的48%,光线暴露将自我充电时间缩短了83%.

结论:

四边形Na2VOP2O7是一种有前途的双功能阴极材料,用于高压ZIB.
修改ZnHAP显著提高了电化学性能和稳定性.
观察到的自我充电效应为多功能储能设备提供了潜力.

关键词:

铁酸盐阴极的使用方法自动充电自动充电离子电池是离子电池的一种.

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