Improving the Performance of Lithium–Sulfur Batteries by Employing Polyimide Particles as Hosting Matrixes

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• 作者：Pei-Yang Gu ; Yi Zhao ; Jian Xie ; Nursimaa Binte Ali ; Lina Nie ; Zhichuan J. Xu ; Qichun Zhang
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：March 23, 2016
• 年：2016
• 卷：8
• 期：11
• 页码：7464-7470
• 全文大小：458K
• ISSN：1944-8252

文摘

Sulfur cathodes with four polyimide (PI) compounds as hosting matrixes have been prepared through a simple one-step approach. These four PIs-S composites exhibited higher sulfur utilization and better cycling stability than pure sulfur. At a current rate of 300 mA g^–1, the initial discharge capacities of PI-1S, PI-2S, PI-3S, and BBLS reached 1120, 1100, 1150, and 1040 mAh g^–1, respectively. After the 30th cycle, PI-1S, PI-2S, PI-3S, BBLS and pristine sulfur powder still remained discharge capacities of 715, 673, 729, 643, and 550 mAh g^–1. Especially, PI-1S and PI-3S cathodes exhibit excellent cycling stability with the discharge capacities of 522 and 574 mAh g^–1 at the 450th cycle, respectively.