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首页> 外文期刊>Nanotechnology >Highly flexible binder-free core-shell nanofibrous electrode for lightweight electrochemical energy storage using recycled water bottles
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Highly flexible binder-free core-shell nanofibrous electrode for lightweight electrochemical energy storage using recycled water bottles

机译：高度灵活的无粘合剂核壳纳米纤维电极，用于使用再生水瓶的轻质电化学储能

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摘要

The creation of a novel flexible nanocomposite fiber with conductive polymer polyaniline (PAni) coating on a polyethylene terephthalate (PET) substrate allowed for increased electrochemical performance while retaining ideal mechanical properties such as very high flexibility. Binderfree PAni-wrapped PET (PAni@PET) fiber with a core-shell structure was successfully fabricated through a novel technique. The PET nanofiber substrate was fabricated through an optimized electrospinning method, while the PAni shell was chemically polymerized onto the surface of the nanofibers. The PET substrate can be made directly from recycled PETE1 grade plastic water bottles. The resulting nanofiber with an average diameter of 121 nm +/- 39 nm, with a specific surface area of 83.72 m(2) g(-1), led to better ionic interactions at the electrode/electrolyte interface. The PAni active layer coating was found to be 69 nm in average thickness. The specific capacitance was found to have increased dramatically from pure PAni with carbon binders. The specific capacitance was found to be 347 F g(-1) at a relatively high scan rate of 10 mV s(-1). The PAni/PET fiber also experienced very little degradation (4.4%) in capacitance after 1500 galvanostatic charge/discharge cycles at a specific current of 1.2 A g(-1). The mesoporous structure of the PAni@PET fibrous mat also allowed for tunable capacitance by controlling the pore sizes. This novel fabrication method offers insights for the utilization of recycled PETE1 based bottles as a high performance, low cost, highly flexible supercapacitor device.
机译：在聚对苯二甲酸乙二酯（PET）基底上创建具有导电聚合物聚苯胺（PAni）涂层的新型柔性纳米复合纤维，可以提高电化学性能，同时保留理想的机械性能，例如很高的柔韧性。通过一种新技术成功地制造了具有芯-壳结构的无粘结剂PAni包裹的PET（PAni @ PET）纤维。通过优化的静电纺丝方法制造PET纳米纤维基材，同时将PAni壳化学聚合到纳米纤维的表面上。 PET基材可以直接由回收的PETE1级塑料水瓶制成。所得的平均直径为121 nm +/- 39 nm的纳米纤维，比表面积为83.72 m（2）g（-1），导致在电极/电解质界面处发生更好的离子相互作用。发现PAni活性层涂层的平均厚度为69nm。已发现，比起具有碳粘合剂的纯PAni，比电容已显着提高。发现在10 mV s（-1）的较高扫描速率下，比电容为347 F g（-1）。在1.2 A g（-1）的特定电流下，经过1500次恒流充电/放电循环后，PAni / PET纤维的电容也几乎没有下降（4.4％）。 PAni @ PET纤维毡的中孔结构还可以通过控制孔径来实现可调电容。这种新颖的制造方法为将回收的基于PETE1的瓶子用作高性能，低成本，高度灵活的超级电容器装置提供了见识。

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