当前位置: X-MOL 学术Batteries Supercaps › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Effects of Crosslinker Concentration in Poly(Acrylic Acid)‐KOH Gel Electrolyte on Performance of Zinc‐Air Batteries
Batteries & Supercaps ( IF 5.7 ) Pub Date : 2020-03-05 , DOI: 10.1002/batt.201900199
Thuy Nguyen Thanh Tran 1 , Michael P. Clark 1 , Hyun‐Joong Chung 1 , Douglas G. Ivey 1
Affiliation  

Zinc‐air batteries (ZABs) using gel polymer electrolytes suffer from low energy efficiency and poor cyclability. This issue is not only associated with the air electrode, as early failure of the battery is often due to the Zn electrode. Here, the cycle life of ZABs using alkaline poly(acrylic acid) (PAA‐KOH) as the electrolyte is shown to vary by changing its crosslinking density. For ZABs using hydrogel electrolytes, understanding the failure mechanism and optimization of the hydrogel composition are key to achieving better utilization of the Zn electrode and battery rechargeability. In addition, the effects of crosslinker concentration on rheological properties, sol‐gel fraction, ionic conductivity, and water retention ability of the hydrogel are discussed. PAA‐KOH gels with lower crosslinking concentrations are weaker, but they have higher conductivity and better water retention, whereas gels with higher crosslinking concentrations affect the diffusion of zincate ions and facilitate passivation of the Zn electrode, resulting in early failure of the battery.

中文翻译:

聚(丙烯酸)-KOH凝胶电解质中交联剂浓度对锌空气电池性能的影响

使用凝胶聚合物电解质的锌空气电池(ZAB)的能源效率低且可循环性差。这个问题不仅与空气电极有关,因为电池的早期故障通常归因于Zn电极。在这里,使用碱性聚丙烯酸(PAA-KOH)作为电解质的ZAB的循环寿命显示出通过改变其交联密度而变化。对于使用水凝胶电解质的ZAB,了解其失效机理和优化水凝胶组成是实现Zn电极更好利用和电池可充电性的关键。此外,还讨论了交联剂浓度对水凝胶流变性,溶胶-凝胶分数,离子电导率和保水能力的影响。交联浓度较低的PAA-KOH凝胶较弱,
更新日期:2020-03-05
down
wechat
bug