Polyimide@Ketjenblack Composite: A Porous Organic Cathode for Fast Rechargeable Potassium-Ion Batteries.
Polyimide@Ketjenblack Composite: A Porous Organic Cathode for Fast Rechargeable Potassium-Ion Batteries.
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DOI：
10.1002/smll.202002953
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发表时间：
2020-08
期刊：
影响因子：
13.3
通讯作者：
Chenglin Zhang;Yang Xu;Kaiming He;Yulian Dong;Huaping Zhao;Lukas Medenbach;Yuhan Wu;Andrea Balducci
中科院分区：
文献类型：
--
作者：
Chenglin Zhang;Yang Xu;Kaiming He;Yulian Dong;Huaping Zhao;Lukas Medenbach;Yuhan Wu;Andrea Balducci
由有机电极构成的钾离子电池被认为是锂离子电池的一种很有前途的替代品。在这里，多孔有机Polyimide@Ketjenblack在PIBs中被证明是阴极，具有优异的性能，具有大的可逆容量（100ma g-1时143 mAh g-1），高倍率容量（1000和5000 mA g-1时125和105 mAh g-1），以及长循环稳定性（2000 mA g-1超过1000次循环时76%的容量保持）。验证了快速电容反应动力学的优势，这得益于原位聚合合成的多孔结构。此外，一种可再生和低成本的全电池被证明具有优越的倍率行为（在3200毫安时为106毫安时）。这项工作提出了一种设计高性能有机PIBs聚合物电极的策略。
Potassium-ion batteries (PIBs) configurated by organic electrodes have been identified as a promising alternative to lithium-ion batteries. Here, a porous organic Polyimide@Ketjenblack is demonstrated in PIBs as a cathode, which exhibits excellent performance with a large reversible capacity (143 mAh g-1 at 100 mA g-1 ), high rate capability (125 and 105 mAh g-1 at 1000 and 5000 mA g-1 ), and long cycling stability (76% capacity retention at 2000 mA g-1 over 1000 cycles). The domination of fast capacitive-like reaction kinetics is verified, which benefits from the porous structure synthesized using in situ polymerization. Moreover, a renewable and low-cost full cell is demonstrated with superior rate behavior (106 mAh g-1 at 3200 mA g-1 ). This work proposes a strategy to design polymer electrodes for high-performance organic PIBs.