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Simultaneous Electrospinning and Electrospraying: Fabrication of a Carbon Nanofibre/MnO/Reduced Graphene Oxide Thin Film as a High‐Performance Anode for Lithium‐Ion Batteries
ChemElectroChem ( IF 3.5 ) Pub Date : 2017-11-09 , DOI: 10.1002/celc.201701012 Fan Wang 1 , Jianxin Cai 2 , Ji Yu 1 , Chao Li 3 , Zhenyu Yang 1, 3
ChemElectroChem ( IF 3.5 ) Pub Date : 2017-11-09 , DOI: 10.1002/celc.201701012 Fan Wang 1 , Jianxin Cai 2 , Ji Yu 1 , Chao Li 3 , Zhenyu Yang 1, 3
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Rational fabrication of flexible thin‐film electrodes with superior electrochemical performance is challenging now in consumer electronics miniaturization. In this work, we combine electrospinning with electrospraying in a simultaneous process to achieve the CNFs/MnO/rGO composite film electrodes (CNFs=carbon nanofibres; rGO=reduced graphene oxide) for lithium‐ion batteries. For the as‐obtained thin‐film electrode, the 2D reduced graphene sheets are dispersed on each of the 1D CNFs/MnO composite filaments, in which the nanofibres and rGO nanosheets can form interconnected morphologies simultaneously. The thin‐film electrodes with enhanced electrical conductivity and flexibility could efficiently accommodate the volume changes of MnO particles by the very elastic buffer space. As expected, the composite electrode exhibits a high discharge capacity of 1118 mAh g−1 at 0.1 A g−1, and then back to 0.1 A g−1 after 80 cycles, the capacity retention is still up to 98 %; at high rates (e. g. 5 A g−1), the composite is still able to maintain a high reversible capacity of 574 mAh g−1 after 3000 cycles with a significant Coulombic efficiency of 99 %. This is the best specific capacity at 5 A g−1 and longest cycling life reported for MnO thin‐film anodes. In addition, the technique provides a facile path to combine 1D fibres/2D nanosheets layer‐by‐layer in a composite film with tunable fibre diameter. This is the first time that the fabrication of 1D CNFs/MnO fibres and 2D rGO sheet network film electrodes via simultaneous electrospinning and electrospraying methods has been reported.
中文翻译：
同时电纺和电喷涂：碳纳米纤维/ MnO /还原的氧化石墨烯薄膜的制备作为锂离子电池的高性能阳极
目前，在消费类电子产品的小型化中，具有优异的电化学性能的柔性薄膜电极的合理制造面临挑战。在这项工作中，我们在一个同时的过程中将静电纺丝与电喷涂相结合，以实现锂离子电池的CNFs / MnO / rGO复合膜电极（CNFs =碳纳米纤维； rGO =还原氧化石墨烯）。对于获得的薄膜电极，将二维还原石墨烯片分散在每个一维CNF / MnO复合丝上，其中纳米纤维和rGO纳米片可以同时形成相互连接的形态。具有非常高的导电性和柔韧性的薄膜电极可以通过非常有弹性的缓冲空间有效地容纳MnO颗粒的体积变化。不出所料在0.1 A g -1下为-1，然后在80个循环后恢复到0.1 A g -1，容量保持率仍高达98％；在高速率（例如5A g -1）下，复合材料在3000次循环后仍能够保持574 mAh g -1的高可逆容量，库仑效率高达99％。这是5 A g -1时的最佳比容量MnO薄膜阳极的循环寿命最长。此外，该技术为将一维纤维/ 2D纳米片逐层结合到具有可调纤维直径的复合膜中提供了一条便捷的途径。这是首次报道通过同时电纺丝和电喷雾方法制造一维CNFs / MnO纤维和二维rGO片状网络薄膜电极。
更新日期：2017-11-09
中文翻译：
同时电纺和电喷涂：碳纳米纤维/ MnO /还原的氧化石墨烯薄膜的制备作为锂离子电池的高性能阳极
目前，在消费类电子产品的小型化中，具有优异的电化学性能的柔性薄膜电极的合理制造面临挑战。在这项工作中，我们在一个同时的过程中将静电纺丝与电喷涂相结合，以实现锂离子电池的CNFs / MnO / rGO复合膜电极（CNFs =碳纳米纤维； rGO =还原氧化石墨烯）。对于获得的薄膜电极，将二维还原石墨烯片分散在每个一维CNF / MnO复合丝上，其中纳米纤维和rGO纳米片可以同时形成相互连接的形态。具有非常高的导电性和柔韧性的薄膜电极可以通过非常有弹性的缓冲空间有效地容纳MnO颗粒的体积变化。不出所料在0.1 A g -1下为-1，然后在80个循环后恢复到0.1 A g -1，容量保持率仍高达98％；在高速率（例如5A g -1）下，复合材料在3000次循环后仍能够保持574 mAh g -1的高可逆容量，库仑效率高达99％。这是5 A g -1时的最佳比容量MnO薄膜阳极的循环寿命最长。此外，该技术为将一维纤维/ 2D纳米片逐层结合到具有可调纤维直径的复合膜中提供了一条便捷的途径。这是首次报道通过同时电纺丝和电喷雾方法制造一维CNFs / MnO纤维和二维rGO片状网络薄膜电极。
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