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首页> 外文期刊>Advanced Materials >A Carbonyl Compound-Based Flexible Cathode with Superior Rate Performance and Cyclic Stability for Flexible Lithium-Ion Batteries
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A Carbonyl Compound-Based Flexible Cathode with Superior Rate Performance and Cyclic Stability for Flexible Lithium-Ion Batteries

机译：具有优异的速率性能和循环稳定性的基于羰基化合物的柔性锂离子电池正极

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摘要

A sulfur-linked carbonyl-based poly(2,5-dihydroxyl-1,4-benzoquinonyl sulfide) (PDHBQS) compound is synthesized and used as cathode material for lithium-ion batteries (LIBs). Flexible binder-free composite cathode with single-wall carbon nanotubes (PDHBQS-SWCNTs) is then fabricated through vacuum filtration method with SWCNTs. Electrochemical measurements show that PDHBQS-SWCNTs cathode can deliver a discharge capacity of 182 mA h g(-1) (0.9 mA h cm(-2)) at a current rate of 50 mA g(-1) and a potential window of 1.5 V-3.5 V. The cathode delivers a capacity of 75 mA h g(-1) (0.47 mA h cm(-2)) at 5000 mA g(-1), which confirms its good rate performance at high current density. PDHBQS-SWCNTs flexible cathode retains 89% of its initial capacity at 250 mA g(-1) after 500 charge-discharge cycles. Furthermore, large-area (28 cm(2)) flexible batteries based on PDHBQS-SWCNTs cathode and lithium foils anode are also assembled. The flexible battery shows good electrochemical activities with continuous bending, which retains 88% of its initial discharge capacity after 2000 bending cycles. The significant capacity, high rate performance, superior cyclic performance, and good flexibility make this material a promising candidate for a future application of flexible LIBs.
机译：合成了硫连接的基于羰基的聚（2,5-二羟基-1,4-苯并醌基硫化物）（PDHBQS）化合物，并将其用作锂离子电池（LIB）的正极材料。然后通过真空过滤法用SWCNTs制备具有单壁碳纳米管（PDHBQS-SWCNTs）的柔性无粘结剂复合阴极。电化学测量表明，PDHBQS-SWCNTs阴极在50 mA g（-1）的电流速率和1.5 V的电势窗口下可以提供182 mA hg（-1）（0.9 mA h cm（-2））的放电容量-3.5V。在5000 mA g（-1）时，阴极提供75 mA hg（-1）（0.47 mA h cm（-2））的容量，这证实了其在高电流密度下的良好倍率性能。经过500个充放电循环后，PDHBQS-SWCNTs柔性阴极在250 mA g（-1）时仍保留其初始容量的89％。此外，还组装了基于PDHBQS-SWCNTs阴极和锂箔阳极的大面积（28 cm（2））柔性电池。柔性电池在连续弯曲时表现出良好的电化学活性，在2000个弯曲循环后仍保持其初始放电容量的88％。巨大的容量，高速率性能，出色的循环性能和良好的柔韧性使这种材料成为柔性LIB未来应用的有希望的候选者。

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  • 来源
    《Advanced Materials》 |2018年第4期|1703868.1-1703868.8|共8页
  • 作者

    Amin Kamran; Meng Qinghai; Ahmad Aziz; Cheng Meng; Zhang Miao; Mao Lijuan; Lu Kun; Wei Zhixiang;

  • 作者单位

    Natl Ctr Nanosci & Technol, 11 Beiyitiao Zhongguancun, Beijing 100190, Peoples R China|Univ Chinese Acad Sci, Beijing 100049, Peoples R China;

    Natl Ctr Nanosci & Technol, 11 Beiyitiao Zhongguancun, Beijing 100190, Peoples R China;

    Natl Ctr Nanosci & Technol, 11 Beiyitiao Zhongguancun, Beijing 100190, Peoples R China|Univ Chinese Acad Sci, Beijing 100049, Peoples R China;

    Natl Ctr Nanosci & Technol, 11 Beiyitiao Zhongguancun, Beijing 100190, Peoples R China;

    Natl Ctr Nanosci & Technol, 11 Beiyitiao Zhongguancun, Beijing 100190, Peoples R China;

    Natl Ctr Nanosci & Technol, 11 Beiyitiao Zhongguancun, Beijing 100190, Peoples R China;

    Natl Ctr Nanosci & Technol, 11 Beiyitiao Zhongguancun, Beijing 100190, Peoples R China;

    Natl Ctr Nanosci & Technol, 11 Beiyitiao Zhongguancun, Beijing 100190, Peoples R China|Univ Chinese Acad Sci, Beijing 100049, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    binder-free cathodes; flexible batteries; single-walled carbon nanotubes (SWCNTs); wearable electronic devices;

    机译：无粘合剂的阴极;柔性电池;单壁碳纳米管（SWCNT）;可穿戴电子设备;

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