Main content area

Extended π-Conjugated System for Fast-Charge and -Discharge Sodium-Ion Batteries

Wang, Chengliang, Xu, Yang, Fang, Yaoguo, Zhou, Min, Liang, Liying, Singh, Sukhdeep, Zhao, Huaping, Schober, Andreas, Lei, Yong
Journal of the American Chemical Society 2015 v.137 no.8 pp. 3124-3130
batteries, chemical structure, electronics, equipment performance, production costs
Organic sodium-ion batteries (SIBs) are potential alternatives of current commercial inorganic lithium-ion batteries for portable electronics (especially wearable electronics) because of their low cost and flexibility, making them possible to meet the future flexible and large-scale requirements. However, only a few organic SIBs have been reported so far, and most of them either were tested in a very slow rate or suffered significant performance degradation when cycled under high rate. Here, we are focusing on the molecular design for improving the battery performance and addressing the current challenge of fast-charge and -discharge. Through reasonable molecular design strategy, we demonstrate that the extension of the π-conjugated system is an efficient way to improve the high rate performance, leading to much enhanced capacity and cyclability with full recovery even after cycled under current density as high as 10 A g–¹.