无纺布基聚吡咯柔性电极的储锂性能

doi:10.11944/j.issn.1000-0518.2020.05.190304

摘要/Abstract

摘要：

高性能的柔性锂离子电池对可穿戴电子设备的发展具有重要意义。采用化学氧化法在聚对苯二甲酸乙二醇酯(PET)无纺布基材上原位聚合聚吡咯(PPy),并通过控制反应条件得到不同形貌的聚吡咯电极材料。当反应体系中剪切力较小时,得到纳米线状聚吡咯(PPy-NW/PET),反之,为纳米颗粒形貌的聚吡咯(PPy-NP/PET)。 PPy纳米线的平均直径为460 nm,在包覆PET纤维的同时相互交叠,形成了三维网状导电通道。该PPy/PET可以直接作为无粘结剂的柔性电极材料。电化学测试结果表明,PPy-NW/PET电极材料的性能更优异,其首次放电和充电的比容量分别为124和98 mA·h/g,且具有良好的柔性和稳定性。本文对柔性、轻质电极材料的制备及其在储能领域的应用提供了很好的思路。

关键词: 聚吡咯, 无纺布, 柔性, 锂离子电池

Abstract:

Flexible lithium-ion batteries with high-performance play a significant role in the development of wearable electronics. Pyrrole was polymerized in situ on polyethylene terephthalate (PET) non-woven fabric substrate through chemical oxidation method. By controlling the reaction conditions, PET-based polypyrrole(PPy) flexible electrode (PPy/PET) with different morphologies can be obtained. When the shearing force is low, the morphology of resulting PPy was nanowires (NW), vice versa, nanoparticles (NP). The mean diameter of PPy-NW is 460 nm. PET is covered with the interconnected PPy-NW, forming three-dimensional netlike conducting pathways. The as-prepared samples are directly used as binder-free flexible electrodes. The results of electrochemical tests demonstrate that PPy-NW/PET is favorable for enhancing lithium storage performance. It delivers an initial discharge and charge capacity of 124 and 98 mA·h/g with superior flexibility and stability. This paper offers a strategy for the fabrication of flexible and lightweight electrode materials and their application in energy storage.

Key words: polypyrrole, non-woven fabric, flexibility, lithium ion battery

刘学, 马华, 徐恒, 计海聪, 王栋. 无纺布基聚吡咯柔性电极的储锂性能[J]. 应用化学, 2020, 37(5): 555-561.

LIU Xue, MA Hua, XU Heng, JI Haicong, WANG Dong. Lithium Storage Properties of Non-woven Fabric Based Polypyrrole Flexible Electrodes[J]. Chinese Journal of Applied Chemistry, 2020, 37(5): 555-561.

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