Dihydrophenazine-Based Conjugated Microporous Polymer Cathodes with Enhanced Electronic and Ionic Conductivities for High-Performance Aluminum Dual-Ion Batteries

Wenyan Ma; Lian-Wei Luo; Xiuhua HuangPeihua DongYu ChenChong ZhangFei HuangJia-Xing JiangYong Cao

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Dihydrophenazine-Based Conjugated Microporous Polymer Cathodes with Enhanced Electronic and Ionic Conductivities for High-Performance Aluminum Dual-Ion Batteries

机译：Dihydrophenazine-Based Conjugated Microporous Polymer Cathodes with Enhanced Electronic and Ionic Conductivities for High-Performance Aluminum Dual-Ion Batteries

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It is fundamentally challenging for cathode materials to achieve long life, high capacity, and fast kinetics in rechargeable aluminum batteries, due to the strong electrostatic interaction between Al3+ and the host materials. Herein, the redox-active dihydrophenazine (Pz) is coupled with pyrene (Py) or biphenyl (Ph) to develop two conjugated microporous polymers of PyPz and PhPz as AlCl_4~?-hosting cathodes for aluminum dual-ion batteries (ADIBs). It is revealed that the planar Py unit endows PyPz with an extended conjugated skeleton and a higher surface area than PhPz produced from the Ph unit with a twisted structure, thus leading to a higher redox activity for PyPz. Hence, the PyPz cathode delivers a much higher capacity of 231 mAh g~(?1) than PhPz (137 mAh g~(?1)). Its porous structure and insolubility also ensure PyPz shows a superior rate performance and exceptional cyclability over 100 000 cycles. Meanwhile, the feature of fast kinetics for AlCl_4~? storage also allows PyPz to operate well at not only a low temperature (?30 ℃) but also a high areal capacity of 2.53 mAh cm~(?2). These findings suggest that redox-active conjugated polymers are promising advanced organic cathodes for sustainable ADIBs, where the electrochemical performance can be significantly enhanced by rational structural design.

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《Advanced energy materials》 |2023年第3期|2203253.1-2203253.10|共10页
作者
Wenyan Ma; Lian-Wei Luo; Xiuhua HuangPeihua DongYu ChenChong ZhangFei HuangJia-Xing JiangYong Cao;
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Key Laboratory for Macromolecular Science of Shaanxi Province Shaanxi Key Laboratory for Advanced Energy Devices School of Materials Science and Engineering Shaanxi Normal University Xi’an 710062, P. R. China;

Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and Devices South China University of Technology Guangzhou 510640, P. R. China;

Key Laboratory for Macromolecular Science of Shaanxi Province Shaanxi Key Laboratory for Advanced Energy Devices School of Materials Science and Engineering Shaanxi Normal University Xi’an 710062, P. R. China,Institute of Polymer Optoelectronic Materials;

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aluminum dual-ion batteries; conjugated microporous polymers; dihydrophenazine; organic cathode materials; pyrenes;

Dihydrophenazine-Based Conjugated Microporous Polymer Cathodes with Enhanced Electronic and Ionic Conductivities for High-Performance Aluminum Dual-Ion Batteries

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