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利用軟模板法製備二次鋰離子電池之鈦酸鋰負極材料之研究 = Prepara...

國立高雄大學應用化學系碩士班

利用軟模板法製備二次鋰離子電池之鈦酸鋰負極材料之研究 = Preparation of Li4Ti5O12 by the Soft Template Method for Anode Material of Lithium-ion Batteries

紀錄類型:	書目-語言資料,印刷品 : 單行本
並列題名:	Preparation of Li4Ti5O12 by the Soft Template Method for Anode Material of Lithium-ion Batteries
作者:	王毓薇,
其他團體作者:	國立高雄大學
出版地:	[高雄市]
出版者:	撰者;
出版年:	2013[民102]
面頁冊數:	100面圖，表格 : 30公分;
標題:	鈦酸鋰
標題:	Li4Ti5O12
電子資源:	http://handle.ncl.edu.tw/11296/ndltd/35227697772827046728
附註:	參考書目：面86-91
附註:	102年10月31日公開
摘要註:	本實驗利用軟模板法以triblock copolymer F127 作為結構導向試劑 (structure-directing agent, SDA)、酚醛樹脂作為碳源，經由溶劑揮發誘導自組裝 (solvent-evaporation-induced self-assembly, SEISA) 和同步熱碳還原反應 (in situ carbothermal reduction) 成功地合成出具規則性中孔洞排列的 Li4Ti5O12 負極材料。規則性中孔洞結構不僅可以縮短 Li 離子的擴散距離，也使得材料具有相當高的表面積。此外，高的表面積可使材料與電解液的接觸面積增加，這些特性將有助於提高材料的電化學性能。我們藉由熱重分析儀、X 光粉末繞射儀、掃描式電子顯微鏡、穿透式電子顯微鏡、表面積及孔徑分析儀、元素分析儀、循環伏安法、交流阻抗法和充放電測試等來對材料進行物理性質、化學性質與電化學性質的分析。結果顯示，此材料具有相當高的表面積，為 812.98 m2/g。在 0.1 C 的放電速率下，具有 143 mAh/g 的電容量，且經過 30 個充放電的循環測試後電容並無明顯的衰退，證明材料具有非常好的循環穩定性。 Preparation of the ordered mesoporous Li4Ti5O12 anode material by the soft template method using a solvent-evaporation-induced self-assembly (SEISA) process combined with in situ carbothermal reduction, and we used the triblock copolymer F127 as the structure-directing agent (SDA) and resol as the carbon source. The ordered mesoporous structure could shorten Li+ diffusion length but also create the large specific surface area. In addition, large specific surface area could increase the contact area between material and electrolyte. All of these factors might have facilitated the electrochemical properties of material increased. The materials were characterized by thermogravimetry analyzer, X-ray powder diffraction, scanning electron microscopy, transmission electron microscopy, small angle X-ray scattering, surface area and porosimetry analyzer, elemental analyzer, cyclic voltammetry, AC impedance and charge-discharge tests. The results showed that material has large specific surface area, which was 812.98 m2/g. The discharge capacity was 143 mAh/g at 0.1 C rate, then the capacity not dropped after 30 cycles, it represented good cycle stability.

利用軟模板法製備二次鋰離子電池之鈦酸鋰負極材料之研究 = Preparation of Li4Ti5O12 by the Soft Template Method for Anode Material of Lithium-ion Batteries
王, 毓薇

利用軟模板法製備二次鋰離子電池之鈦酸鋰負極材料之研究 = Preparation of Li4Ti5O12 by the Soft Template Method for Anode Material of Lithium-ion Batteries / 王毓薇撰 - [高雄市] : 撰者, 2013[民102]. - 100面 ; 圖，表格 ; 30公分.
參考書目：面86-91102年10月31日公開.
鈦酸鋰Li4Ti5O12

利用軟模板法製備二次鋰離子電池之鈦酸鋰負極材料之研究 = Preparation of Li4Ti5O12 by the Soft Template Method for Anode Material of Lithium-ion Batteries
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330 $a 本實驗利用軟模板法以triblock copolymer F127 作為結構導向試劑 (structure-directing agent, SDA)、酚醛樹脂作為碳源，經由溶劑揮發誘導自組裝 (solvent-evaporation-induced self-assembly, SEISA) 和同步熱碳還原反應 (in situ carbothermal reduction) 成功地合成出具規則性中孔洞排列的 Li4Ti5O12 負極材料。規則性中孔洞結構不僅可以縮短 Li 離子的擴散距離，也使得材料具有相當高的表面積。此外，高的表面積可使材料與電解液的接觸面積增加，這些特性將有助於提高材料的電化學性能。我們藉由熱重分析儀、X 光粉末繞射儀、掃描式電子顯微鏡、穿透式電子顯微鏡、表面積及孔徑分析儀、元素分析儀、循環伏安法、交流阻抗法和充放電測試等來對材料進行物理性質、化學性質與電化學性質的分析。結果顯示，此材料具有相當高的表面積，為 812.98 m2/g。在 0.1 C 的放電速率下，具有 143 mAh/g 的電容量，且經過 30 個充放電的循環測試後電容並無明顯的衰退，證明材料具有非常好的循環穩定性。 Preparation of the ordered mesoporous Li4Ti5O12 anode material by the soft template method using a solvent-evaporation-induced self-assembly (SEISA) process combined with in situ carbothermal reduction, and we used the triblock copolymer F127 as the structure-directing agent (SDA) and resol as the carbon source. The ordered mesoporous structure could shorten Li+ diffusion length but also create the large specific surface area. In addition, large specific surface area could increase the contact area between material and electrolyte. All of these factors might have facilitated the electrochemical properties of material increased. The materials were characterized by thermogravimetry analyzer, X-ray powder diffraction, scanning electron microscopy, transmission electron microscopy, small angle X-ray scattering, surface area and porosimetry analyzer, elemental analyzer, cyclic voltammetry, AC impedance and charge-discharge tests. The results showed that material has large specific surface area, which was 812.98 m2/g. The discharge capacity was 143 mAh/g at 0.1 C rate, then the capacity not dropped after 30 cycles, it represented good cycle stability.
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610 1 $a Li4Ti5O12 $a soft template method $a mesoporous material $a large specific surface
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