國立高雄大學圖資館 |

Language: English

Back

利用超音波霧化法合成磷酸鋰鐵/碳複合材料之研究 = The Study ...

國立高雄大學應用化學系碩士班

利用超音波霧化法合成磷酸鋰鐵/碳複合材料之研究 = The Study of Synthesis of LiFePO4/C Composite by the Ultrasonic Spray Drying Method

Record Type:	Language materials, printed : monographic
Paralel Title:	The Study of Synthesis of LiFePO4/C Composite by the Ultrasonic Spray Drying Method
Author:	沈曉萱,
Secondary Intellectual Responsibility:	國立高雄大學
Place of Publication:	[高雄市]
Published:	撰者;
Year of Publication:	2012[民101]
Description:	129面圖，表格 : 30公分;
Subject:	磷酸鋰鐵
Subject:	LiFePO4
Online resource:	http://handle.ncl.edu.tw/11296/ndltd/62381886860081399985
Notes:	參考書目：面108-114
Summary:	本研究利用超音波霧化法合成酸鋰鐵/碳複合材料，實驗探討乾燥溫度 (100 °C、150 °C、200 °C、250 °C)、界面活性劑 (BK-70、P123、F127) 以及前驅液濃度 (0.25M、0.125 M、0.0625 M) 的不同對材料的影響。實驗中發現界面活性劑於酸性環境中因質子化反應無法自組裝，其存在之環境溫度若高於界面活性劑之臨界溫度，亦無法自組裝，因此，實驗以兩種路徑進行，一，乾燥溫度低於界面活性劑，使其自組裝而形成均勻表面凹洞性質之中空球體；二，乾燥溫度高於界面活性劑之臨界溫度，其不自組裝，以單體存在於水溶液中而能合成奈米粒子之材料。利用熱重/差式掃描量熱分析 (TGA/DSC) 分段討論材料與溫度的關係，由掃描式電子顯微鏡 (SEM) 觀察材料表面型態，並經由穿透式電子顯微鏡(TEM) 研究材料之碳層披覆完整性。其最佳條件於 0.1 C 放電速率下得到 160mAh/g 之電容，於 60 個循環壽命後仍維持理論電容之 91 % ，穩定的充放電。 We use the ultrasonic spray drying method to synthesize LiFePO4/C compositesuccessfully. Experiment discusses the difference of drying temperatures (100 °C、150°C、200 °C and 250 °C), surfactants (BK-70、P123、F127) and consistencies of precursor(0.25 M、0.125 M、0.0625 M). We discuss the effect of temperature and pH value on surfactants. Surfactants cannot be self-assembly on the condition of drying temperature which is the critical temperature. Absolutely surfactants can not be self-assembly on the condition of acidic environment as well. Then the results indicate that surfactants self-assembly can produce hollow sphere particle with core. Otherwise, it produces nano-size particle, and makes the core similar coral inside the particle. From the thermal analysis (TGA/DSC), scanning electronic microstructure (SEM), and transmission electronic microstructure (TEM), we discuss reaction of material and temperature, surface composition of material, and carbon content on the surface of material, respectively. The best condition has capacity of 160 mAh/g at 0.1 C. It still has 91% of theoretical capacity and stable performance after 60 cycle numbers. We successfully synthesize electrochemical performance cathode material not only stable but also excellent.

利用超音波霧化法合成磷酸鋰鐵/碳複合材料之研究 = The Study of Synthesis of LiFePO4/C Composite by the Ultrasonic Spray Drying Method
沈, 曉萱

利用超音波霧化法合成磷酸鋰鐵/碳複合材料之研究 = The Study of Synthesis of LiFePO4/C Composite by the Ultrasonic Spray Drying Method / 沈曉萱撰 - [高雄市] : 撰者, 2012[民101]. - 129面 ; 圖，表格 ; 30公分.
參考書目：面108-114.
磷酸鋰鐵LiFePO4

利用超音波霧化法合成磷酸鋰鐵/碳複合材料之研究 = The Study of Synthesis of LiFePO4/C Composite by the Ultrasonic Spray Drying Method
LDR:03553nam0a2200277 450 001 346235
005 20170214092911.0
009 346235
010 0 $b 精裝
010 0 $b 平裝
100 $a 20170214d2012 k y0chiy05 e
101 1 $a chi $d chi $d eng
102 $a tw
105 $a ak am 000yy
200 1 $a 利用超音波霧化法合成磷酸鋰鐵/碳複合材料之研究 $d The Study of Synthesis of LiFePO4/C Composite by the Ultrasonic Spray Drying Method $z eng $f 沈曉萱撰
210 $a [高雄市] $c 撰者 $d 2012[民101]
215 0 $a 129面 $c 圖，表格 $d 30公分
300 $a 參考書目：面108-114
314 $a 指導教授：陳振興博士
328 $a 碩士論文--國立高雄大學應用化學系碩士班
330 $a 本研究利用超音波霧化法合成酸鋰鐵/碳複合材料，實驗探討乾燥溫度 (100 °C、150 °C、200 °C、250 °C)、界面活性劑 (BK-70、P123、F127) 以及前驅液濃度 (0.25M、0.125 M、0.0625 M) 的不同對材料的影響。實驗中發現界面活性劑於酸性環境中因質子化反應無法自組裝，其存在之環境溫度若高於界面活性劑之臨界溫度，亦無法自組裝，因此，實驗以兩種路徑進行，一，乾燥溫度低於界面活性劑，使其自組裝而形成均勻表面凹洞性質之中空球體；二，乾燥溫度高於界面活性劑之臨界溫度，其不自組裝，以單體存在於水溶液中而能合成奈米粒子之材料。利用熱重/差式掃描量熱分析 (TGA/DSC) 分段討論材料與溫度的關係，由掃描式電子顯微鏡 (SEM) 觀察材料表面型態，並經由穿透式電子顯微鏡(TEM) 研究材料之碳層披覆完整性。其最佳條件於 0.1 C 放電速率下得到 160mAh/g 之電容，於 60 個循環壽命後仍維持理論電容之 91 % ，穩定的充放電。 We use the ultrasonic spray drying method to synthesize LiFePO4/C compositesuccessfully. Experiment discusses the difference of drying temperatures (100 °C、150°C、200 °C and 250 °C), surfactants (BK-70、P123、F127) and consistencies of precursor(0.25 M、0.125 M、0.0625 M). We discuss the effect of temperature and pH value on surfactants. Surfactants cannot be self-assembly on the condition of drying temperature which is the critical temperature. Absolutely surfactants can not be self-assembly on the condition of acidic environment as well. Then the results indicate that surfactants self-assembly can produce hollow sphere particle with core. Otherwise, it produces nano-size particle, and makes the core similar coral inside the particle. From the thermal analysis (TGA/DSC), scanning electronic microstructure (SEM), and transmission electronic microstructure (TEM), we discuss reaction of material and temperature, surface composition of material, and carbon content on the surface of material, respectively. The best condition has capacity of 160 mAh/g at 0.1 C. It still has 91% of theoretical capacity and stable performance after 60 cycle numbers. We successfully synthesize electrochemical performance cathode material not only stable but also excellent.
510 1 $a The Study of Synthesis of LiFePO4/C Composite by the Ultrasonic Spray Drying Method $z eng
610 0 $a 磷酸鋰鐵 $a 超音波霧化 $a 界面活性劑 $a 乾燥溫度 $a 自組裝
610 1 $a LiFePO4 $a ultrasonic spray drying $a surfactant $a drying temperature $a self-assembly
681 $a 008M/0019 $b 421202 3464 $v 2007年版
700 1 $a 沈 $b 曉萱 $4 撰 $3 576443
712 0 2 $a 國立高雄大學 $b 應用化學系碩士班 $3 166131
801 0 $a tw $b NUK $c 20121108 $g CCR
856 7 $z 電子資源 $2 http $u http://handle.ncl.edu.tw/11296/ndltd/62381886860081399985