本文選題：鎳基 + 配位化合物��； 參考：《南昌大學(xué)》2017年碩士論文

【摘要】：超級電容器(Supercapacitor),是一種高效、實(shí)用的能量儲存設(shè)備。相對于傳統(tǒng)的儲能器件,它具有更好的性能:功率密度高、充電時(shí)間短、使用壽命長、溫度特性好、節(jié)約能源和綠色環(huán)保等。正因如此,它被廣泛應(yīng)用在各個(gè)領(lǐng)域中,如便攜式電子產(chǎn)品、混合動力電動汽車、計(jì)算機(jī),計(jì)算機(jī)內(nèi)存存儲系統(tǒng)等。如今,正因?yàn)槌夒娙萜鞒蔀榱艘环N高效實(shí)用的儲能設(shè)備,各個(gè)發(fā)達(dá)國家都將其視為國家重點(diǎn)戰(zhàn)略研究項(xiàng)目,尤其是研究和發(fā)展大功率的超級電容器。因此,本文利用簡便的水熱法,將直接長在泡沫鎳上的鎳基配位化合物應(yīng)用在超級電容器中。主要內(nèi)容如下:(1)通過水熱法成功制備了三維網(wǎng)狀納米結(jié)構(gòu)沒食子酸鎳鎳。通過電化學(xué)分析,沒食子酸鎳表現(xiàn)出良好的電化學(xué)性能:在電流密度為9 mA cm-2(3A g-1)條件下其比電容達(dá)到3.688 F cm-2(1229.3 F g-1),同時(shí),Ni(C_7H_4O_5)三維網(wǎng)狀納米結(jié)構(gòu)即使在超高電流密度40 mA cm-2下,經(jīng)過5000個(gè)循環(huán)之后,比電容仍然能維持在87.9%。而且,當(dāng)我們將Ni(C_7H_4O_5)三維網(wǎng)狀納米結(jié)構(gòu)作為陽極材料,活性炭作為陰極材料組裝非對稱超級電容器后,發(fā)現(xiàn)整個(gè)非對稱超級電容器器件的電化學(xué)性能很好:在電流密度為0.5 A g-1時(shí),器件的質(zhì)量比電容達(dá)到了71.4F g-1,0-1.55V電壓范圍內(nèi),最大能量密度能達(dá)到23.8 W h kg-1,最大功率密度為388.2 W kg-1。同時(shí),非對稱器件的循環(huán)穩(wěn)定性和庫倫效率也表現(xiàn)良好。這些出色的性能都暗示Ni(C_7H_4O_5)三維網(wǎng)狀納米結(jié)構(gòu)在超級電容器中的應(yīng)用具有極大的潛力。(2)通過水熱法成功制備了Ni(C_8H_6O_5,Ni-Tp)金屬有機(jī)框架材料,同時(shí),為了提高其導(dǎo)電性,我們利用電化學(xué)沉積的方法,在其表面沉積一層聚苯胺(PANI)。通過電化學(xué)分析,Ni-Tp/PANI表現(xiàn)出良好的電化學(xué)性能:在電流密度為20 mA cm-2條件下其比電容達(dá)到10.327F cm-2。同時(shí),Ni-Tp/PANI材料在超高電流密度50 mA cm-2下,經(jīng)過3000個(gè)循環(huán)之后,比電容仍然能維持在85.35%,說明了Ni-Tp/PANI的循環(huán)穩(wěn)定性良好,且在整個(gè)循環(huán)過程中的庫倫效率都保持在96%以上,說明了整個(gè)體系中的電化學(xué)反應(yīng)的可逆性很好。(3)通過水熱法成功制備了Ni(C_7H_4O_5)一維納米陣列。同時(shí),通過電化學(xué)分析,Ni(C_7H_4O_5)一維納米陣列表現(xiàn)出良好的電化學(xué)性能:在電流密度為3mA cm-2(1A/g)條件下其比電容達(dá)到1.63F cm-2(543.3 F/g)。同時(shí),一維的Ni(C_7H_4O_5)樣品在超高電流密度21 mA cm-2(7A/g)下,經(jīng)過3000個(gè)循環(huán)之后,比電容仍然能維持在85%,說明了一維的Ni(C_7H_4O_5)樣品具有良好的循環(huán)穩(wěn)定性,且整個(gè)循環(huán)過程中一維的Ni(C_7H_4O_5)樣品的庫倫效率都保持在94%以上,說明了整個(gè)體系中的電化學(xué)反應(yīng)的可逆性很好。
[Abstract]:Supercapacitor supercapacitor is an efficient and practical energy storage equipment. Compared with traditional energy storage devices, it has better performance, such as high power density, short charging time, long service life, good temperature characteristics, energy saving and green environmental protection. Because of this, it is widely used in various fields, such as portable electronic products, hybrid electric vehicles, computers, computer memory storage systems and so on. Nowadays, because supercapacitors have become a kind of efficient and practical energy storage equipment, all developed countries regard them as national key strategic research projects, especially in the research and development of high-power supercapacitors. Therefore, a simple hydrothermal method is used to apply nickel based coordination compounds directly to nickel foam in supercapacitors. The main contents are as follows: (1) Nickel gallate has been successfully prepared by hydrothermal method. By electrochemical analysis, nickel gallate showed good electrochemical performance: its specific capacitance reached 3.688 F cm-2(1229.3 F g-1 at the current density of 9 Ma cm-2(3A g-1, and NiC7H4O5) at the same time, the three-dimension netted nanostructure was even at the ultra-high current density of 40 Ma cm-2. After 5,000 cycles, the specific capacitance can still be maintained at 87.9. Moreover, when we use NiCSCH _ 7H _ 4O _ 5s) three-dimensional netted nanostructures as anode materials and activated carbon as cathode materials to assemble asymmetric supercapacitors, It is found that the electrochemical performance of the whole asymmetric supercapacitor is very good: when the current density is 0.5 A g ~ (-1), the mass specific capacitance of the device reaches 71.4 F g ~ (-1) ~ (-1) V voltage, the maximum energy density can reach 23.8 W 路kg ~ (-1) and the maximum power density is 388.2 W / kg ~ (-1). At the same time, the cyclic stability and Coulomb efficiency of asymmetric devices are also good. These excellent properties imply that the application of the NiCSP _ 7H _ 4O _ 5C _ C _ S _ 7H _ 4O _ 5) three-dimensional netted nanostructures in supercapacitors has great potential. (2) the Ni-C8H6O5Ni-Tp) metal-organic framework materials have been successfully prepared by hydrothermal method and, in order to improve their conductivity, We deposited a layer of Polyaniline on its surface by electrochemical deposition. The electrochemistry analysis shows that Ni-Tp / pani shows good electrochemical performance: its specific capacitance reaches 10.327F cm-2 at the current density of 20mA cm-2. At the same time, after 3000 cycles, the specific capacitance of Ni-Tp / pani material can be maintained at 85.35 at the ultra-high current density of 50 Ma cm-2, which indicates that the cycle stability of Ni-Tp/PANI is good, and the Coulomb efficiency is above 96% during the whole cycle. The results show that the electrochemical reaction in the whole system has good reversibility. (3) NiCstack _ 7H _ 4O _ 5) one-dimensional nanoarrays have been successfully prepared by hydrothermal method. At the same time, the electrochemical analysis shows that the one-dimensional nanoarrays have good electrochemical performance: the specific capacitance reaches 1.63F cm-2(543.3 / g at the current density of 3mA cm-2 / 1 / g. At the same time, after 3000 cycles, the specific capacitance of the one-dimensional NiSCH _ 7H _ S _ 4O _ 5) sample can still be maintained at 85 under the ultra-high current density of 21 Ma ~ cm ~ (-2) / 7A / g), which shows that the one-dimensional Nistac _ 7H _ 4O _ S _ 5) sample has good cyclic stability. The Coulomb efficiency of one-dimensional NiC7H _ 4O _ s _ 5) samples remained above 94% during the whole cycle, which indicated that the electrochemical reaction in the whole system was very reversible.
【學(xué)位授予單位】：南昌大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：O641.4;TM53

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本文編號：1862088