Wet-spinning assembly of cellulose nanofibers reinforced graphene/polypyrrole microfibers for high performance fiber-shaped supercapacitors
Wet-spinning assembly of cellulose nanofibers reinforced graphene/polypyrrole microfibers for high performance fiber-shaped supercapacitors
复制标题
用于高性能纤维状超级电容器的纤维素纳米纤维增强石墨烯/聚吡咯微纤维的湿纺组装
DOI：
10.1016/j.electacta.2018.02.118
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发表时间：
2018-04-10
影响因子：
6.6
通讯作者：
Li, Dagang
中科院分区：
文献类型：
--
作者：
Mo, Mengmin;Chen, Chuchu;Li, Dagang
纤维状超级电容器具有卓越的柔韧性和相当大的能量存储能力，已成为可穿戴和便携式电子设备领域的有前途的候选者。事实上，纤维状超级电容器的机械性能和电化学性能都需要显着改善才能满足实际应用。在本文中，通过方便的湿纺策略制备了高性能纤维素纳米纤维增强石墨烯/聚吡咯微纤维。纤维素纳米纤维既充当“增强剂”又充当“间隔物”，不仅提供大量氢键以增强层间力，而且还可以防止石墨烯片重新堆叠。这种超细纤维表现出优异的拉伸强度（364.3MPa），优于大多数已报道的超级电容器纤维。同时，组装的纤维状超级电容器在0.1 mA cm(-2)电流密度下，具有液体电解质334 mF cm(-2)和固体电解质218 mF cm(-2)的高比电容，也处于纤维状超级电容器的顶级水平。该策略结合了工业上可行的湿法纺丝技术和精心设计的结构，用于制造高性能三元纤维状超级电容器，为可穿戴和便携式储能设备的开发提供了良好的参考。 (C) 2018 Elsevier Ltd. 保留所有权利。
Fiber-shaped supercapacitors with remarkable flexibility and considerable energy-storage capacity have become the promising candidates in the field of wearable and portable electronic devices. In fact, both of the mechanical properties and electrochemical performance are in need of significant improvement to satisfy the practical applications of fiber-shaped supercapacitors. In this paper, a high-performance cellulose nanofibers reinforced graphene/polypyrrole microfiber is fabricated by a convenient wet-spinning strategy. The cellulose nanofibers act as both "enhancer" and "spacer", which not only provide substantial hydrogen bonds to strengthen the interlaminar force but also prevent the restacking of the graphene sheets. This microfiber exhibits excellent tensile strength (364.3MPa), which is superior to most of the reported fibers for supercapacitors. Meanwhile, the assembled fiber-shaped supercapacitors possess high specific capacitances of 334 mF cm(-2) in liquid electrolyte and 218 mF cm(-2) in solid electrolyte at the current density of 0.1 mA cm(-2), which are also at the top level of fiber-shaped supercapacitors. The presented strategy combines the industrially viable wet-spinning technology and the well-designed structure for the fabrication of high-performance ternary fiber-shaped supercapacitors, providing a good reference for the development of wearable and portable energy storage devices. (C) 2018 Elsevier Ltd. All rights reserved.