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首页> 外文期刊>Advanced Functional Materials >Toward High-Performance Dihydrophenazine-Based Conjugated Microporous Polymer Cathodes for Dual-Ion Batteries through Donor-Acceptor Structural Design
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Toward High-Performance Dihydrophenazine-Based Conjugated Microporous Polymer Cathodes for Dual-Ion Batteries through Donor-Acceptor Structural Design

机译：通过供体 - 受体结构设计向双离子电池进行高性能二氢噻吩嗪的共轭微孔聚合物阴极

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摘要

Recent studies have demonstrated that dihydrophenazine (Pz) with high redox-reversibility and high theoretical capacity is an attractive building block to construct p-type polymer cathodes for dual-ion batteries. However, most reported Pz-based polymer cathodes to date still suffer from low redox activity, slow kinetics, and short cycling life. Herein, a donor-acceptor (D-A) Pz-based conjugated microporous polymer (TzPz) cathode is constructed by integrating the electron-donating Pz unit and the electron-withdrawing 2,4,6-triphenyl-1,3,5-triazine (Tz) unit into a polymer chain. The D-A type structure enhances the polymer conjugation degree and decreases the band gap of TzPz, facilitating electron transportation along the polymer skeletons. Therefore the TzPz cathode for dual-ion battery shows a high reversible capacity of 192 mAh g(-1) at 0.2 A g(-1) with excellent rate performance (108 mAh g(-1) at 30 A g(-1)), which is much higher than that of its counterpart polymer BzPz produced from 1,3,5-triphenylbenzene (Bz) and Pz (148 and 44 mAh g(-1) at 0.2 and 10 A g(-1), respectively). More importantly, the TzPz cathode also shows a long and stable cyclability of more than 10 000 cycles. These results demonstrate that the D-A structural design is an efficient strategy for developing high-performance polymer cathodes for dual-ion batteries.
机译：最近的研究表明，具有高氧化还原性和高理论能力的二氢噻吩（PZ）是一种有吸引力的构建块，用于构建双离子电池的p型聚合物阴极。然而，大多数报道的基于PZ的聚合物阴极迄今仍然缺乏低氧化还原活性，缓慢的动力学和短循环寿命。在此，通过将电子给予的PZ单元与电子抽出的2,4,6-三苯基-1,3,5-三嗪（ TZ）单元进入聚合物链。 D-A型结构增强了聚合物共轭度并降低了TZPZ的带隙，促进了沿聚合物骨架的电子输送。因此，双离子电池的TZPZ阴极在0.2Ag（-1）下，具有优异的速率性能（108mAhg（-1），30Ag（-1） ），高于从1,3,5-三苯基苯（BZ）和PZ（148和44mAhg（-1）的对应聚合物BZPZ，分别为0.2和10Ag（-1）的对应聚合物BZPZ） 。更重要的是，TZPZ阴极也显示出长且稳定的可循环性超过10 000个循环。这些结果表明，D-A结构设计是开发用于双离子电池的高性能聚合物阴极的有效策略。

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  • 来源
    《Advanced Functional Materials》 |2021年第45期|2105027.1-2105027.9|共9页
  • 作者

    Ma Wenyan; Luo Lian-Wei; Dong Peihua; Zheng Peiyun; Huang Xiuhua; Zhang Chong; Jiang Jia-Xing; Cao Yong;

  • 作者单位

    Shaanxi Normal Univ Minist Educ Sch Mat Sci & Engn Key Lab Appl Surface & Colloid Shaanxi Key Lab Adv Energy Devices Key Lab Macrom Xian 710062 Peoples R China;

    Shaanxi Normal Univ Minist Educ Sch Mat Sci & Engn Key Lab Appl Surface & Colloid Shaanxi Key Lab Adv Energy Devices Key Lab Macrom Xian 710062 Peoples R China;

    Shaanxi Normal Univ Minist Educ Sch Mat Sci & Engn Key Lab Appl Surface & Colloid Shaanxi Key Lab Adv Energy Devices Key Lab Macrom Xian 710062 Peoples R China;

    Shaanxi Normal Univ Minist Educ Sch Mat Sci & Engn Key Lab Appl Surface & Colloid Shaanxi Key Lab Adv Energy Devices Key Lab Macrom Xian 710062 Peoples R China;

    Shaanxi Normal Univ Minist Educ Sch Mat Sci & Engn Key Lab Appl Surface & Colloid Shaanxi Key Lab Adv Energy Devices Key Lab Macrom Xian 710062 Peoples R China;

    Shaanxi Normal Univ Minist Educ Sch Mat Sci & Engn Key Lab Appl Surface & Colloid Shaanxi Key Lab Adv Energy Devices Key Lab Macrom Xian 710062 Peoples R China;

    Shaanxi Normal Univ Minist Educ Sch Mat Sci & Engn Key Lab Appl Surface & Colloid Shaanxi Key Lab Adv Energy Devices Key Lab Macrom Xian 710062 Peoples R China;

    Shaanxi Normal Univ Minist Educ Sch Mat Sci & Engn Key Lab Appl Surface & Colloid Shaanxi Key Lab Adv Energy Devices Key Lab Macrom Xian 710062 Peoples R China|South China Univ Technol State Key Lab Luminescent Mat & Devices Inst Polymer Optoelect Mat & Devices Guangzhou 510640 Peoples R China;

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  • 正文语种 eng
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  • 关键词

    conjugated microporous polymers; dihydrophenazine; donor-acceptor structures; dual-ion batteries; organic cathodes;

    机译：共轭的微孔聚合物;二氢噻吩;供体 - 受体结构;双离子电池;有机阴极;

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