Electrodeposited Cu/buckypaper composites with high electrical conductivity and ampacity
Electrodeposited Cu/buckypaper composites with high electrical conductivity and ampacity
复制标题
具有高导电率和载流量的电沉积铜/巴基纸复合材料
DOI：
10.1016/j.jallcom.2017.11.040
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发表时间：
2018-02-25
影响因子：
6.2
通讯作者：
Li, Caiju
中科院分区：
文献类型：
--
作者：
Chen, Xiaofeng;Tao, Jingmei;Li, Caiju
Cu/巴基纸复合材料是通过硫酸铜电解质将铜电沉积到巴基纸上而制备的。通过酸化和氧化将含氧官能团引入碳纳米管（CNT）表面。研究表明，官能团的引入有助于在浸泡处理过程中碳纳米管表面铜离子的自发还原。在1 mA cm(-2)的小沉积电流密度下，Cu离子可以渗入巴基纸的网状结构并在碳纳米管上均匀成核，从而形成较厚的过渡层。功能化还提高了碳纳米管上铜的成核率。当电流密度为1 mA cm(-2)时,Cu/氧化巴基纸复合材料的电导率达到最大值4.09×10(5) S cm(-1),为纯Cu的76%。与电沉积纯Cu相比，所有复合材料的载流容量均得到明显提高。 Cu/氧化巴基纸复合材料的最大载流量为15437 A cm(2)，分别比纯Cu和Cu/原始巴基纸复合材料高65%和14%。过渡层中形成的碳纳米管良好的界面结合和网状结构是铜/巴基纸复合材料具有相对高的电导率和高载流量的原因。 (C) 2017 Elsevier B.V. 保留所有权利。
Cu/buckypaper composites were prepared through electrodeposition of Cu onto buckypaper from a Cu sulfate electrolyte. The oxygen-containing functional groups were introduced to the surface of carbon nanotubes (CNTs) through acidification and oxidation. Incorporation of functional groups was shown to facilitate the spontaneous reduction of Cu ions on the surface of CNTs during immersion treatment. Under small deposition current density of 1 mA cm(-2), Cu ions could penetrate into the reticulate structure of buckypaper and nucleate homogeneously on the CNTs, which led to the formation of a thicker transition layer. Functionalization also increased the nucleation rate of Cu on the CNTs. When the current density was 1 mA cm(-2), the electrical conductivity of Cu/oxidized buckypaper composite reached the maximum value of 4.09 x 10(5) S cm(-1) which was 76% of pure Cu. The ampacities of all the composites were obviously improved compared with electrodeposited pure Cu. The Cu/oxidized buckypaper composite had the maximum ampacity of 15437 A cm(2), which was 65% and 14% higher than that of pure Cu and Cu/original buckypaper composite, respectively. Good interface bonding and reticulate structure of CNTs formed in the transition layers are responsible for the relatively high electrical conductivities and high ampacities of Cu/buckypaper composites. (C) 2017 Elsevier B.V. All rights reserved.