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使用Au-修改分离器调节离子流,实现同质化Zn金属沉积

Mengyuan Shen¹, Anli Wang¹, Jianlin Chen¹

¹State Key Laboratory of Electrical Insulation and Power Equipment, School of Electrical Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China.

Journal of colloid and interface science

|December 22, 2024

概括

一种新的金涂玻璃纤维分离器 (Au@GF) 通过确保均的沉积来提高水性离子电池的性能. 这种修改显著改善了循环寿命和稳定性,克服了当前电池技术的关键局限性.

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:

水性离子电池 (AZIB) 提供具有成本效益,安全和环保的储能解决方案.
由于阳极的可逆性较差和沉积不均,AZIBs的实际应用受到限制.
分离器修改是一个可行的策略,可以增强电极/电解质接口特性并提高循环稳定性.

研究的目的:

为AZIBs开发一个改进的分离器,促进均的沉积,提高电池性能.
为了研究金涂玻璃纤维分离器 (Au@GF) 对涂/剥离行为和循环寿命的影响.

主要方法:

一个金涂玻璃纤维分离器 (Au@GF) 的制造.
使用Au@GF和裸玻璃纤维 (GF) 分离器组装和测试Zn
在各种电流密度和容量下评估循环性能.
用不同的阴极材料测试全细胞.

主要成果:

该Au@GF分离器促进了均的Zn2+分布和均的沉积.
与GF细胞 (<40小时) 相比,具有Au@GF的Zn对称细胞的周期寿命显著延长 (> 1600小时在5 mA cm-2/1 mAh cm-2)
对于Au@GF细胞,即使在电流密度更高 (15mA cm-2/3 mAh cm-2) 时,也观察到延长寿命 (750小时).
在AZIB全细胞中也证实了循环性能的改善.

结论:

该Au@GF分离器有效调节涂/脱落,导致稳定和持久的AZIBs.
这种方法提供了一种简单有效的方法来实现均沉积,解决了AZIB技术的一个关键挑战.
这些发现突出了分离器功能化的潜力,用于推进高性能水性离子电池.

关键词:

水性离子电池的电池是水性离子电池.经过AU修改的分离器均的 Zn 沉积方式均的电场分布均的电场分布

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