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非溶剂诱导相位分离 pPAN 分离器用于无树突的可充电电池

Yi Meng¹, Xianfeng Du¹, Yuehong Xie¹

¹Engineering Research Center of Energy Storage Materials and Devices, Ministry of Education, School of Chemistry, Xi'an Jiaotong University, Xi'an 710049, P. R. China.

ACS applied materials & interfaces

|September 26, 2024

概括

一种新型的聚乙烯醇改性聚烯二 (pPAN) 分离器有效地防止可充电电池中的树状的生长. 这一突破提高了电池的安全性和循环寿命,为储能提供了一个有前途的解决方案.

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:

可充电电池 (RAB) 提供高安全性,长周期寿命和低成本.
由于氨酸离子液体电解质 (ILEs) 的腐蚀性,阻碍了RAB的发展,这些电解质会损坏传统分离器.
阳极树突的生长仍然是RAB性能和安全的重大挑战.

研究的目的:

为可充电电池开发一种具有增强化学和电化学稳定的新型分离材料.
调查新分离器在抑制树生长方面的有效性.
为了评估可充电电池的性能,使用开发的分离器.

主要方法:

使用非溶剂诱导的相分离策略制造一个用聚乙烯醇 (pPAN) 改性聚烯二 (pPAN) 分离器.
描述pPAN分离器的物理和化学特性,包括孔径分布,泽塔电位和ILEs中的稳定性.
使用pPAN分离器组装和测试完全可充电的电池电池,评估循环性能,容量和树抑制.

主要成果:

在腐蚀性ILEs中,pPAN分离器表现出了卓越的化学和电化学稳定性.
分离器的均孔结构和负泽塔电位 (-10.20 mV) 有效地抑制了树状岩石的形成.
带有pPAN分离器的可充电电池在600 mA g-1下实现了超过500个周期的稳定循环,容量为88.8 mAh g-1.
pPAN 分离器在离子电池中也表现出色.

结论:

开发的pPAN分离器为可充电电池中阳极状物生长的挑战提供了强大的解决方案.
这项工作提出了一个可行的策略,用于设计高性能和安全的基储能系统的先进分离器.
这些发现表明,pPAN分离器在其他电池化学中具有更广泛的适用性,例如离子电池.

关键词:

没有树石的树石.非溶剂诱导的相位分离.pPAN 分离器 pPAN 分离器阶段分离的阶段分离.聚烯基烯二烯的使用方法聚乙烯酒精的使用情况可充电的电池可充电的电池

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