本文選題：柔性可穿戴 + 導(dǎo)電紗線��； 參考：《南京郵電大學(xué)》2017年碩士論文

【摘要】：柔性可穿戴電子設(shè)備市場(chǎng)潛力大,發(fā)展迅速,已步入了人們的日常生活。柔性可穿戴電子器件對(duì)能源系統(tǒng)提出了新的要求,研制柔性、輕質(zhì)的高容量電池和超級(jí)電容器成為這一領(lǐng)域的前沿課題。其中線狀器件具有多維度柔性和可編織性能而得到廣泛的研究。線狀器件的核心為線狀電極,主要包括碳纖維、碳納米管纖維、石墨烯纖維和生長了活性材料的金屬絲線等。與碳基纖維相比,金屬絲具有更優(yōu)異的導(dǎo)電性和力學(xué)性能,適于后續(xù)的規(guī)模化制備,可通過機(jī)器進(jìn)行紡織或編織等加工。但商用金屬絲密度大,表面光滑,比表面積小,導(dǎo)致后續(xù)活性材料負(fù)載困難、有效容量低等問題。本論文提出泡沫鎳紗線結(jié)構(gòu)來降低密度、提高比表面積,即以尼龍紗線為模板,通過化學(xué)鍍鎳、電鍍鎳和后續(xù)高溫還原煅燒工藝,制備多孔中空的泡沫鎳紗線。利用該泡沫鎳紗線的毛細(xì)作用,溶液吸附負(fù)載碳納米管(CNTs)和石墨烯(graphene)等材料,構(gòu)建超級(jí)電容器電極并組裝全固態(tài)柔性線狀器件,為高性能線狀集流體和電極的研制探索新的途徑。1.泡沫鎳紗線的多孔中空結(jié)構(gòu)賦予其本征毛細(xì)作用。利用這一性能,碳納米管可通過簡便的溶液浸漬而沉積在泡沫鎳紗線的表面及孔中,形成碳納米管/泡沫鎳紗線(CNTs-PNY)電極。電極PNY的多孔中空結(jié)構(gòu)具有高效吸附CNTs的能力,CNTs的負(fù)載量可以達(dá)到33 mg m~(-1)。CNTs-PNY復(fù)合電極展示出優(yōu)秀的電化學(xué)性能、優(yōu)異的機(jī)械強(qiáng)度和柔韌性。線電極的體積電容在0.2 A cm~(-3)電流密度下可以達(dá)到28.04 F cm~(-3)。2.以PNY作為基底,通過和氧化石墨烯溶液加熱還原法,在泡沫鎳線上生長一層石墨烯;再通過一步水熱的方法成功石墨烯表面負(fù)載了一層MnO_2納米片,從而制備出MnO_2-Graphene-PNY復(fù)合電極。MnO_2-Graphene活性層與PNY集流體結(jié)合牢固。MnO_2超級(jí)電容材料顯著提高了線狀電極的容量。與純石墨烯線狀電極相比,MnO_2-Graphene-PNY復(fù)合電極的儲(chǔ)能容量提高了5倍,其體積比容量在0.2 A cm~(-3)的充放電流密度下可達(dá)34 F cm~(-3)。該復(fù)合電極在1000次的循環(huán)充放下的仍保持在82.3%,顯示出良好的穩(wěn)定性。
[Abstract]:Flexible wearable electronic equipment market potential, rapid development, has entered the daily life of people. Flexible wearable electronic devices have put forward new requirements for energy systems. The development of flexible lightweight high capacity batteries and supercapacitors has become a frontier issue in this field. Among them, linear devices are widely studied for their multi-dimensional flexibility and braiding properties. The core of linear device is linear electrode, which includes carbon fiber, carbon nanotube fiber, graphene fiber and metal wire with active material. Compared with carbon-based fibers, the wires have better electrical conductivity and mechanical properties, which are suitable for the subsequent large-scale preparation and can be machined for textile or braiding. However, the commercial wire has high density, smooth surface and small specific surface area, which leads to the difficulty of loading and the low effective capacity of the subsequent active materials. In this paper, the structure of nickel foam yarn is proposed to reduce the density and increase the specific surface area. That is to say, the porous hollow nickel foam yarn is prepared by electroless nickel plating, nickel plating and subsequent high temperature reduction calcination process using nylon yarn as template. Using the capillary action of the nickel foam yarn to adsorb carbon nanotube (CNTs) and graphene (graphene), the electrode of supercapacitor was constructed and the all-solid-state flexible linear device was assembled. To explore a new way for the development of high performance linear collector and electrode. 1. The porous hollow structure of nickel foam yarn endows it with intrinsic capillary effect. By using this property, carbon nanotubes can be deposited on the surface and pores of nickel foam yarns by simple solution impregnation, and CNTs-PNYs electrode can be formed by carbon nanotubes / nickel foam yarns. The porous hollow structure of the electrode has the ability to adsorb CNTs efficiently. The loading amount of the composite electrode can reach 33 mg m~(-1).CNTs-PNY. The composite electrode exhibits excellent electrochemical performance, excellent mechanical strength and flexibility. The volume capacitance of the wire electrode can reach 28.04 F cm ~ (-1) -3 ~ (-1) at current density of 0.2 A cm ~ (-1) ~ (-3). Using PNY as substrate, a layer of graphene was grown on a nickel foam wire by heating and reducing with graphene oxide solution, and a layer of MnO_2 nanoparticles was successfully loaded on the surface of graphene by one step hydrothermal method. Thus, the MnO_2-Graphene-PNY composite electrode. MNO _ 2-Graphene active layer and the PNY collector binding firmly. MNO _ 2 super capacitor material significantly improved the capacity of the linear electrode. Compared with the pure graphene linear electrode, the energy storage capacity of the MnO2-Graphene-PNY composite electrode is five times higher than that of the pure graphene electrode, and the specific volumetric capacity of the composite electrode can reach 34 F cm ~ (-1) at the charge-discharge current density of 0.2 A cm ~ (-3). The composite electrode remained at 82.3 after 1000 cycles, showing good stability.
【學(xué)位授予單位】：南京郵電大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TG146.15;TM53

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 李釗;徐菊良;李旭晏;郭麗芳;李勁;蔣益明;;基于雙相不銹鋼制備超級(jí)電容器電極材料MnO_2[J];物理化學(xué)學(xué)報(bào);2011年06期

，

本文編號(hào)：1876774