鹼金族配位聚合物的合成、結構鑑定與電化學性質研究

Synthesis, Structures and Electrochemical Properties of Alkali Metal Coordination Polymers

高慶哲(Ching-Che Kao)

指導教授 ： 林嘉和

中原大學/理學院/化學研究所/碩士(2012年)

https://doi.org/10.6840/cycu201200286

摘要

在本論文的第三章中，我們成功以鹼金族陽離子做為中心金屬，與2,5-硫苯二羧酸利用中溫水熱合成法合成出五個新穎的金屬配位聚合物，又利用鋰金屬作為中心金屬，與另外三種有機配位基利用中溫水熱合成法合成出三種新穎鋰配位聚合物，它們的分子式分別為：
[Li2TDC(H2O)] (1) [Na(HTDC)] (2)
[K(HTDC)] (3) [Rb(HTDC)] (4)
[Cs(HTDC)] (5) [Li2(HPBC)] (6)
[Li2NTC(H2O)3]2 (7) [Li5(HCEPA)(CEPA)] (8)
單晶X-ray繞射分析顯示化合物2、3、4、5、8為三維網狀結構，化合物1、6為二維層狀結構，化合物7為零維分子結構。以上的化合物除了以單晶X-ray繞射儀來鑑定其分子結構外，還利用其它的分析工具如粉末X-ray繞射分析、元素分析、熱重分析、紅外光光譜、紫外-可見光吸收光譜儀等，來探討化合物特性；
在第四章將所合出的鋰配位聚合物應用於鋰離子電池電極材料研究分析。並利用循環伏安法、充放電測試、交流阻抗分析等電化學分析進ㄧ步探討之間的相關性。研究結果顯示，化合物6、7、8，於0.1C放電速率下電容量皆可達100 mAh/g以上，且這些化合物經30個循環壽命測試有良好的穩定性。

關鍵字

鋰電池 ； 配位聚合物 ； 鹼金族 ； 負極

並列摘要

Eight new coordination polymers, [Li2TDC(H2O)] (1), [Na(HTDC)] (2), [K(HTDC)] (3), [Rb(HTDC)] (4), [Cs(HTDC)] (5), [Li2(HPBC)] (6), [Li2NTC(H2O)3]2 (7) and, [Li5(HCEPA)(CEPA)] (8), (H2TDC = 2,5-Thiophenedicarboxylic acid, H3PBC = 4-phosphonobenzoic acid, H4NTC = 1,4,5,8-Naphthalene tetracarboxylic acid, H3CEPA = 3-Phosphonopropionic acid) are synthesized from alkali metal ions and organic acids under solvothermal reactions.
The single crystal X-ray structure analysis showed that compound 2、3、4、5 and 8 both are 3D frameworks structure, compound 1 and 6 has 2D sheets, and compound 7 has 0D molecular structure. These complexes were also characterized by powder X-ray diffraction, elemental analysis, thermogravimetric analysis, Fourier transform infrared spectroscopy and, UV-Vis spectra.
The lithium coordination polymers were also tested as anode materials for lithium ion batteries. All new electrodes were characterized by powder X-ray, scanning electron microscopy, elemental analysis, cyclic voltammetry, charge-discharge tests and AC-impedance. These new anode materials display discharge capacity of above 100m Ah/g at 0.1C rate and stable cycle performance within thirty cycles.

並列關鍵字

lithium ion battery ； anode ； alkali ； coordination polymers

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