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以微乳化法製備奈米磷酸鋰鐵/碳複合材料及其電化學性質鑑定 = Synth...

國立高雄大學應用化學系碩士班

以微乳化法製備奈米磷酸鋰鐵/碳複合材料及其電化學性質鑑定 = Synthesis and Electrochemical Characterization of Nano-LiFePO4/C Composite Prepared by the Microemulsion Method

Record Type:	Language materials, printed : monographic
Paralel Title:	Synthesis and Electrochemical Characterization of Nano-LiFePO4/C Composite Prepared by the Microemulsion Method
Author:	林敬翰,
Secondary Intellectual Responsibility:	國立高雄大學
Place of Publication:	[高雄市]
Published:	撰者;
Year of Publication:	2009[民98]
Description:	105面圖、表 : 30公分;
Subject:	微乳化法
Subject:	LiFePO4
Online resource:	http://ethesys.nuk.edu.tw/ETD-db/ETD-search-c/view_etd?URN=etd-1020109-160156
Notes:	指導教授：陳振興
Notes:	參考書目：面
Summary:	本研究以油包水 (W/O) 型微乳化系統製備奈米磷酸鋰鐵/碳複合材料。選擇具有苯環結構的 NP 系列及 OP 系列非離子型界面活性劑作為碳源，與水相/正丁醇/環己烷以特定的比例配製成不同條件的微乳化液。透過改變不同的水相鹽類濃度、親疏水平衡值 (Hydrophile-lipophile balance，HLB)、界面活性劑結構參數，控制生成的微胞大小以控制生成粒子尺寸。將經 600℃ 煅燒後所得的粉末分別以 X-ray 繞射分析 (XRD)、穿透式電子顯微鏡 (TEM)、電子掃描顯微鏡 (SEM)、拉曼光譜 (Raman spectrum)、元素分析 (EA)、循環伏安法 (CV) 及充放電測試進行分析。研究結果發現電化學的展現與粒子尺寸及ID/IG比值有關。而以 OP-7 界面活性劑構成的微乳化液所製備的磷酸鋰鐵/碳具有最小的粒子尺寸，在電化學性質上有最佳的展現。於 0.1C 放電速率下電容量可達 156mAh/g，相當於理論電容量的 92%，且經30圈循環壽命測試結果具有良好的穩定性。 Electroactive LiFePO4/C nano-composite powders have been successfully prepared by the microemulsion technique under controlled conditions. NP and OP series nonionic surfactants were used as carbon additives to study their influence on the behavior of the LiFePO4/C composite. The aqueous cores of water/ surfactant/ n-butanal/ cyclohexane microemulsions were used as constrained microreactors for precursor. Here we reported particle size was controlled by various parameters, such as salt concentrations, HLB values, structure of surfactants. Nano-crystalline LiFePO4/C composite powders were obtained by calcinating the cores at 600oC.All samples were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, Raman spectral analysis, element analysis, BET, cyclic voltammetry and charge-discharge tests. The smaller particles were obtained with lower salt concentration and HLB value. The performance of the nano-LiFePO4/C composite powders displayed a strong relationship with the particle size and ID/IG ratio . Sample 0.4M-OP7 exhibited the highest discharge capacity of 156 mAh/g (92% of the theoretical capacity) at 0.1 C rate and displayed a stable cycle performance during cycling.

以微乳化法製備奈米磷酸鋰鐵/碳複合材料及其電化學性質鑑定 = Synthesis and Electrochemical Characterization of Nano-LiFePO4/C Composite Prepared by the Microemulsion Method
林, 敬翰

以微乳化法製備奈米磷酸鋰鐵/碳複合材料及其電化學性質鑑定 = Synthesis and Electrochemical Characterization of Nano-LiFePO4/C Composite Prepared by the Microemulsion Method / 林敬翰撰 - [高雄市] : 撰者, 2009[民98]. - 105面 ; 圖、表 ; 30公分.
指導教授：陳振興參考書目：面.
微乳化法LiFePO4

以微乳化法製備奈米磷酸鋰鐵/碳複合材料及其電化學性質鑑定 = Synthesis and Electrochemical Characterization of Nano-LiFePO4/C Composite Prepared by the Microemulsion Method
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