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Yuanze Yu¹, Xu Jia¹, Qian Zhang²

¹Youth Innovation Team of Shandong Higher Education Institutions, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China.

Journal of colloid and interface science

|August 21, 2024

概括

这项研究引入了一种新的方法,使用尿素来溶解水性Zn离子电池 (AZIB) 中的阳极上的副产品. 这一策略提高了电池的寿命,并使使用过的AZIBs能够被重新激活.

科学领域:

电化学电化学电化学
材料科学材料科学材料科学
协调化学协调化学

背景情况:

水性离子电池 (AZIB) 由于在阳极上大量的副产品形成,寿命缩短,导致不均的沉积和阳极失活.
这些副产品,主要是Zn ₄SO ₄(OH) ₆·xH ₂O,显著阻碍了AZIBs的性能和寿命.
制定管理这些副产品的策略对于推进AZIB技术至关重要.

研究的目的:

提出并验证基于化学的协调策略,以消除AZIB中Zn阳极上的副产品.
证明尿素作为活性剂的有效性,用于溶解 Zn 阳极副产品并使阳极修复.
通过阳极表面管理,提高AZIB的循环稳定性和使用寿命.

主要方法:

在电解质中利用尿素在副产品表面以催化方式产生氨 (NH).
采用协调化学,其中NH₃与副产品 ([Zn(NH₃) ₄]²⁺) 中的Zn²⁺离子形成可溶复合物.
通过理论模拟和实验研究,系统地证明了该机制,包括Zn的对称细胞和Zn的完整细胞.

主要成果:

拟议的电解质有效地分解副产品,防止循环过程中Zn阳极的失活.
成功实现了废弃 Zn 阳极的重新激活,证明了电池再利用的潜力.
一个对称Zn电池表现出高耐用性,累计容量为10,600 mAh cm-2 在40 mA cm-2.

结论:

协调化学方法有效地消除了 Zn 阳极的副产品,大大延长了 AZIB 的寿命.
基于尿素的重新激活提供了一种可行的方法来修复和重复使用废弃的离子电池.
这项研究为提高AZIB的耐用性和可回收性提供了一个新的途径.

关键词:

行动机制行动机制阳极的重新激活水性离子电池的电池是水性离子电池.超高的累积产能超高的累积产能废弃的电池是废弃的电池.

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