本文選題：細(xì)菌纖維素 + 聚吡咯�。� 參考：《武漢紡織大學(xué)》2017年碩士論文

【摘要】：細(xì)菌纖維素(BC)是一種引人關(guān)注的、對環(huán)境友好的天然納米纖維材料,主要是由細(xì)菌通過D-葡萄糖生產(chǎn)的。細(xì)菌纖維素是由一系列連續(xù)的寬度為50-80nm、厚度為3-8nm納米纖維組成的三維多孔微型網(wǎng)狀結(jié)構(gòu)的帶狀物。細(xì)菌纖維素具有高純度、高結(jié)晶度、高吸水性、優(yōu)秀的機械穩(wěn)定性和良好的生物親和性等性能,其含量豐富的羥基可以通過較強的相互作用,將不同納米結(jié)構(gòu)物質(zhì)(如無機和導(dǎo)電聚合物納米粒子或納米線)輕松地吸附。導(dǎo)電高分子(CPs)具有輕質(zhì)、柔性、良好的導(dǎo)電性和高比容量,過渡金屬氧化物/金屬硫化物具有高比容量和良好的氧化還原可逆性能,已經(jīng)被廣泛地應(yīng)用于柔性贗電容器。本論文利用細(xì)菌纖維素膜為模板,通過沉積聚吡咯和金屬氧化物/硫化物在細(xì)菌纖維素上,得到柔性和高電導(dǎo)率的聚吡咯/金屬化合物/細(xì)菌纖維素復(fù)合電極材料。主要研究內(nèi)容如下:(1)利用BC膜為基底,沉積硫化鎳(Ni S),并通過原位聚合的方法將聚吡咯(PPy)負(fù)載到BC上得到柔性電極材料,實驗測試結(jié)果表明:當(dāng)吡咯濃度為1mol/L,Fe Cl3溶液濃度為0.5mol/L時,制備的PPy/Ni S/BC柔性電極材料電導(dǎo)率可達(dá)5.1S/cm。在電流密度為0.8m A/cm~2時,柔性電極材料的比容量、能量密度和功率密度分別為713F/g、239.0Wh/kg和39.5W/kg。隨著電流密度從0.2增大到1.6m A/cm~2對應(yīng)的比容量從884減小到569F/g。Ni S的加入提高了材料的比容量,但該材料循環(huán)穩(wěn)定性較差,300次循環(huán)后比容量僅保留了25%。(2)利用BC膜為基底,硫化鈷(Co S)為模板,通過原位聚合的方法將PPy沉積到BC上得到柔性電極材料,實驗測試結(jié)果表明:Co S的加入明顯地提高了以BC為基材的電容器的比容量和循環(huán)穩(wěn)定性。在電流密度為0.8m A/cm~2(0.70A/g)時,柔性電極材料的比容量614F/g,經(jīng)過300次循環(huán)后,比容量相對于初始比容量依然維持62.4%。PPy/Co S/BC柔性超級電容器在功率密度為663W/kg下能量密度為54.5Wh/kg。(3)利用BC膜為基底,硫化銅(CuS)為模板,通過原位聚合的方法將PPy沉積到BC上得到PPy/CuS/BC柔性電極材料,實驗測試結(jié)果表明:CuS的加入明顯地提高了以BC膜為基材的電容器的比容量和循環(huán)穩(wěn)定性。在電流密度為0.8m A/cm~2時,柔性電極材料的比容量580F/g,經(jīng)過300次循環(huán)后比容量相對于初始比容量依然維持72%,但是PPy/BC經(jīng)過300次充放電后比容量只維持了21.7%。(4)利用BC膜為基底,氧化銅(Cu O)為模板,通過原位聚合的方法將PPy沉積到BC上得到柔性電極材料,實驗測試結(jié)果表明:當(dāng)吡咯濃度為1mol/L,Fe Cl3溶液濃度為0.5mol/L,乙酸銅溶液的質(zhì)量分?jǐn)?shù)為1wt%時,制備的PPy/Cu O/BC柔性電極材料電導(dǎo)率可達(dá)7.4S/cm。在電流密度為0.8m A/cm~2時,柔性電極材料的比容量、能量密度和功率密度分別為601F/g、48.2Wh/kg和85.8W/kg。經(jīng)過300次充放電后,比容量依然含有385F/g。Cu O納米粒子的加入證實提高了材料的比容量,經(jīng)過300次充放電后比容量保留了64.1%。
[Abstract]:Bacterial cellulose (BC) is an attractive, environmentally friendly natural nanofiber material, mainly produced by bacteria via D-glucose. Bacterial cellulose is a series of three-dimensional porous microreticular structures composed of a series of continuous widths of 50-80 nm and thickness of 3-8nm nanofibers. Bacterial cellulose has high purity, high crystallinity, high water absorption, excellent mechanical stability and good biological affinity. Different nanostructured substances (such as inorganic and conductive polymer nanoparticles or nanowires) are easily adsorbed. Conductive polymer (CPs) has been widely used in flexible pseudo-capacitors due to its advantages of light weight, flexibility, good conductivity and high specific capacity. Transition metal oxides / metal sulfides have high specific capacity and good redox reversibility. In this paper, a flexible and highly conductivity polypyrrole / metal compound / bacterial cellulose composite electrode material was obtained by depositing polypyrrole and metal oxide / sulfide on bacterial cellulose as template. The main contents of this study are as follows: (1) the nickel sulphide Ni / Ni / Si was deposited on BC substrate, and polypyrrole pyrrolidine (PPyN) was loaded on BC by in situ polymerization to obtain flexible electrode material. The experimental results show that when the concentration of pyrrole is 1 mol / L Cl3 solution concentration is 0.5mol/L, the conductivity of the prepared PPy/Ni S/BC flexible electrode material can reach 5.1 s / cm. When the current density is 0.8 Ma / cm ~ 2, the specific capacity, energy density and power density of the flexible electrode materials are 713F / g / g 239.0 / kg and 39.5 W / kg respectively. With the increase of current density from 0. 2 to 1. 6 m A/cm~2, the specific capacity of the material decreases from 884 to 569F/g.Ni S, but the specific capacity of the material after 300 cycles with poor cycle stability is only 25%. 2) the BC film is used as the substrate, and the specific capacity of the material increases with the increase of the current density from 0. 2 to 1. 6 m. The flexible electrode materials were prepared by in-situ polymerization of PPy onto BC by cobalt sulfide Co S as template. The experimental results show that the specific capacity and cycle stability of capacitors based on BC have been improved obviously by adding w Co S. When the current density is 0.8 Ma / cm ~ 2 / 0.70 A / g, the specific capacity of the flexible electrode material is 614 F / g. After 300 cycles, the specific capacity of the 62.4%.PPy/Co S/BC flexible supercapacitor is maintained at a power density of 54.5 Whkg.m3 at the power density of 663W/kg, and the specific capacity of the flexible supercapacitor is maintained by using the BC film as the substrate, relative to the initial specific capacity. PPy was deposited on BC by in-situ polymerization of copper sulfide (CuS) as template. The experimental results show that the addition of% CuS can obviously improve the specific capacity and cyclic stability of capacitors based on BC film. When the current density is 0.8 Ma / cm ~ 2, the specific capacity of the flexible electrode material is 580F / g. After 300 cycles, the specific capacity of the flexible electrode material remains 72g relative to the initial specific capacity, but after 300 charges and discharges, the specific capacity of the PPy/BC is only maintained at 21.77.4.) the BC film is used as the substrate. The flexible electrode material was prepared by in-situ polymerization of PPy onto BC by in-situ polymerization. The experimental results show that when the concentration of pyrrole is 0.5 mol / L, the concentration of copper acetate solution is 1 wt%, when the concentration of pyrrole is 0.5 mol / L, the concentration of copper acetate solution is 1 wt%. The conductivity of the prepared PPy/Cu O/BC flexible electrode material can reach 7.4 S / cm. When the current density is 0.8 Ma / cm ~ 2, the specific capacity, energy density and power density of the flexible electrode materials are 601F / g / kg and 85.8 W / kg, respectively. After 300 times of charge and discharge, the specific capacity still contains 385F/g.Cu O nanoparticles. It is proved that the specific capacity of the material is increased. After 300 times of charge and discharge, the specific capacity remains 64.1%.
【學(xué)位授予單位】：武漢紡織大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：O636.11;TM53

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相關(guān)期刊論文 前1條

1 Yidan Gao;Yaoyao Zhang;Yong Zhang;Lijing Xie;Xiaoming Li;Fangyuan Su;Xianxian Wei;Zhiwei Xu;Chengmeng Chen;Rong Cai;;Three-dimensional paper-like graphene framework with highly orientated laminar structure as binder-free supercapacitor electrode[J];Journal of Energy Chemistry;2016年01期

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本文編號：1845705