鹼金族配位聚合物的合成、結構解析與負極應用性質研究

Synthesis, Structures and Anode applications of Alkali Metal Coordination Polymers

曾豐順(Feng-Shun Zeng)

指導教授 ： 林嘉和

中原大學/理學院/化學研究所/碩士(2011年)

https://doi.org/10.6840/CYCU.2011.00140

摘要

在此論文中，我們成功了利用鹼金族陽離子與4,4'-羥基二苯甲酸(4,4'-oxybisbenzoic acid，H2OBA)合成一系列化合物。另外，又以鋰金屬作為中心金屬與三種有機配位基合成出三種新穎鋰配位聚合物，且藉由中溫水熱合成法合成出八個不同的新穎有機金屬骨架。另ㄧ部分，也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。本文中所合成出的結構如下：
[Li2(OBA)] (1) [Na2(OBA)(H2O)] (2)
[K(HOBA)] (3) [Rb(HOBA)] (4)
[Cs(HOBA)] (5) [KLi(SB)] (6)
[Li2(PDA)] (7) [Li2(SDA)] (8)
第一部份主要是利用4,4'-羥基二苯甲酸(H2OBA)為有機配位基與鹼金族合成出化合物1-5。另外，也利用4-磺基苯甲酸單鉀塩(4-Sulfobenzoic acid monopotassium salt，4-SB)、對苯二乙酸(1,4-Phenylenediacetic acid，H2PDA)與二苯乙烯二羧酸(4,4'-stilbenedicarboxylic acid，H2SDA)與鋰金屬合成出化合物6-8。經由X光單晶繞射鑑定結果顯示化合物1-8皆為三維網狀結構。以上化合物1-8除了使用單晶X光繞射儀來鑑定其結構外，也利用了粉末X光繞射儀、元素分析儀、熱重分析儀、紫外-可見光吸收光譜儀、螢光放光光譜儀和紅外光共振光譜儀來探討其特性。
第二部份則將化合物1、6、7、8應用於鋰離子二次電池負極材料性能研究，並經由粉末X光繞射儀、掃描式電子顯微鏡、BET比表面積儀、元素分析儀，檢測材料晶形、粒子分佈形態、尺寸、比表面積；並與循環伏安法、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1、6、7、8，於0.1C放電速率下電容量皆可達100 mAh/g以上，且經30個循環壽命測試有良好的穩定性。

關鍵字

鋰電池 ； 鹼金族

並列摘要

Eight new coordination polymers have synthesized under hydrothermal reactions and characterized by single crystal analysis. The reaction of 4,4'-oxybisbenzoic acid with alkali metal ions. In addition, three new lithium coordination polymers were also synthesized between aromatic carboxylic acids and lithium ions. Moreover , lithium coordination polymers were tested as anode materials for lithium ion batteries. Compounds 1 to 8 are as follows:
[Li2(OBA)] (1) [Na2(OBA)(H2O)] (2)
[K(HOBA)] (3) [Rb(HOBA)] (4)
[Cs(HOBA)] (5) [KLi(SB)] (6)
[Li2(PDA)] (7) [Li2(SDA)] (8)
In section one, eight new coordination compounds 1-8 were synthesized by four different aromatic carboxylic acids and alkali metal ions. The single crystal structure analysis showed that all compounds are 3-D metal-organic framework. All compounds were further characterized by powder X-ray, elemental analysis, thermogravimetric analysis, UV-VIS spectra, photoluminescence and IR spectroscopy.
In section two, the lithium compounds 1、6、7 and 8 were tested as anode materials for lithium ion batteries. All new electrodes were characterized by powder X-ray, scanning electron microscopy, BET, elemental analysis, cyclic voltammetry, charge-discharge tests and AC-impedance.
These new anode materials display discharge capacity of above 100mAh/g at 0.1C rate and a stable cycle performance within thirty cycles.

並列關鍵字

Alkli metal ； Lithium ion batteries

參考文獻

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