Novel Graphene/Carbon Nanotube Composite Fibers for Efficient Wire-Shaped Miniature Energy Devices
Novel Graphene/Carbon Nanotube Composite Fibers for Efficient Wire-Shaped Miniature Energy Devices
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DOI：
10.1002/adma.201305188
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发表时间：
2014-05-01
影响因子：
29.4
通讯作者：
Peng, Huisheng
中科院分区：
文献类型：
--
作者：
Sun, Hao;You, Xiao;Peng, Huisheng
纤维材料在我们的生活中起着至关重要的作用。例如，聚合物纤维可能是材料科学进步中最重要的突破之一，由于其重量轻，柔韧性高，成本低，织造技术发达，被广泛用作结构材料，特别是各种纺织品。[1,2]相比之下，由于金属线具有高导电性，因此通常在广泛的电子设备中探索高效电极材料。[3,4]一般来说，聚合物纤维由于不导电而很少用于电子设备的研究，而金属丝由于重量大、柔韧性低而不能有效地编织成适用的纺织结构。然而，在许多领域同时要求高柔韧性、高强度、高导电性和轻重量。为此，最近人们在合成纳米结构纤维方面做了很多努力，以实现上述目标。在一种情况下，碳纳米管（CNTs）通过干法或湿法纺丝工艺纺成直径为微米、长度为数百米的连续纤维。[5,6]与传统纤维材料相比，柔性碳纳米管纤维显示出许多综合优势，包括：(1)密度低，为1 g/ cm3或10µg/m，而棉纱和毛纱的密度分别为10 mg/m和20-100 mg/m；[7](2)抗拉强度高，可达103mpa，比强度是T1000的5.3倍，是最强的商用纤维，比刚度是最硬的商用纤维M70J的4.3倍；(3)电导率高，可达10 3 S/cm.[8]然而，碳纳米管纤维表现出相对较低的电催化活性，这对电子应用至关重要。在另一种情况下，石墨烯片也被制成连续纤维。[9-14]与碳纳米管纤维相比，石墨烯纤维表现出更高的第二相负载能力，如具有高电催化能力的铂纳米颗粒，但电导率较低，为10-10 2 S/cm。[9,14]碳纳米管和石墨烯纤维都被认为是很有前途的电极材料。[7,15 - 17]灵活、轻便、便携的电子设备不断受到人们的关注，代表着一种新的发展趋势
Fiber materials play a critical role in our life. For instance, polymer fibers may represent one of the most important breakthroughs in the advancement of Materials Science, and they have been widely used as structure materials, particularly, various textiles by the well-developed weaving technology, due to the light weight and high flexibility with low cost.[1, 2] In contrast, metal wires are typically explored for efficient electrode materials in a broad spectrum of electronic devices due to the high electrical conductivity.[3, 4] In general, polymer fibers have been rarely investigated for electronic facilities as they are not electrically conductive, while metal wires cannot be effectively woven into applicable textile structures because of the high weight and low flexibility. However, high flexibility, strength, conductivity, and light weight are simultaneously required in many fields.To this end, a lot of efforts have been recently made to synthesize nanostructured fibers that are proposed to achieve the above goals. In one case, carbon nanotubes (CNTs) had been spun into continuous fibers with diameters of micrometers and lengths of hundreds of meters by either dry or wet spinning processes.[5, 6] Compared with the conventional fiber materials, the flexible CNT fibers showed many combined advantages including:(1) low density of 1 g/cm 3 or 10 µg/m, compared to 10 mg/m and 20–100 mg/m for cotton and wool yarns, respectively;[7](2) high tensile strength up to 10 3 MPa with specific strength to be 5.3 times of T1000, the strongest commercial fiber and specific stiffness to be 4.3 times of M70J, the stiffest commercial fiber;(3) high electrical conductivity up to 10 3 S/cm.[8] However, the CNT fibers exhibited relatively low electrocatalytic activities that were found to be critical for electronic applications. In the other case, graphene sheets had been also made into continuous fibers.[9–14] Compared with the CNT fiber, the graphene fiber demonstrated much higher loading capability for a second phase such as platinum nanoparticles with high electrocatalytic ability but lower electrical conductivity of 10–10 2 S/cm.[9, 14] Both CNT and graphene fibers had been proposed for promising electrode materials.[7, 15–17] Flexible, lightweight, portable electronic devices have continuously attracted increasing attentions and represent a