Aqueous Lithium-Ion Batteries Using Polyimide-Activated Carbon Composites Anode and Spinel LiMn2O4 Cathode

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• 作者：Zhaowei Guo ; Long Chen ; Yonggang WangCongxiao Wang ; Yongyao Xia
• 刊名：ACS Sustainable Chemistry & Engineering
• 出版年：2017
• 出版时间：February 6, 2017
• 年：2017
• 卷：5
• 期：2
• 页码：1503-1508
• 全文大小：572K
• ISSN：2168-0485

文摘

Polyimide/activated carbon (PI/AC) composites were prepared by in situ polymerization of 1,4,5,8-naphthalenete-tracarboxylic dianhydride (NTCDA) and ethylene diamine (EDA) on activated carbon with various mass ratios varying from 50:50 to 70:30. These composites were examined as anode materials in 5 M LiNO₃ solution in the potential window from −0.75 to 0 V vs Ag/AgCl. With an optimal composition PI/AC 50:50 in mass ratio, the composite delivers a specific capacity of 87 mAh g^–1 at a current density of 0.2 A g^–1, and it also shows excellent cycling stability and rate capability. A sealed full cell containing a PI/AC composite anode and LiMn₂O₄ cathode delivers a specific capacity of 42 mAh g^–1 and energy density of 51Wh kg^1– (based on the total weight of both active materials) at a current density of 0.2 A g^–1. The full cell exhibits good cycling stability with a specific capacity of 35 mAh g^–1 after 450 cycles, corresponding to a capacity retention of 89%.