Suppressing the Self‐Discharge of Supercapacitors by Modifying Separators with an Ionic Polyelectrolyte,Advanced Materials Interfaces

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Suppressing the Self‐Discharge of Supercapacitors by Modifying Separators with an Ionic Polyelectrolyte
Advanced Materials Interfaces ( IF 4.3 ) Pub Date : 2018-02-28 , DOI: 10.1002/admi.201701547
Haiyan Wang ₁ , Qinqin Zhou ₁ , Bowen Yao ₁ , Hongyun Ma ₁ , Miao Zhang ₁ , Chun Li ₁ , Gaoquan Shi ₁

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The application of supercapacitors for energy storage is severely limited by their self‐discharging behavior. Herein, a convenient technique is reported to effectively suppress the self‐discharge of typical activated carbon‐based supercapacitors by modifying their porous cellulose separators with a cationic polyelectrolyte, polyethyleneimine. Experimental and theoretical studies indicate that polyelectrolyte modification slows the ion diffusion driven by concentration gradient, while does not sacrifice the electrochemical performances of the supercapacitors.

中文翻译：

通过用离子聚电解质修饰隔膜来抑制超级电容器的自放电

超级电容器在储能方面的应用受到其自放电行为的严重限制。本文报道了一种方便的技术，可通过用阳离子聚电解质聚乙烯亚胺修饰其多孔纤维素隔膜来有效抑制典型的基于活性炭的超级电容器的自放电。实验和理论研究表明，聚电解质修饰减慢了由浓度梯度驱动的离子扩散，而没有牺牲超级电容器的电化学性能。

更新日期：2018-02-28

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