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研究生:江雅萍
研究生(外文):Ya Ping Chiang
論文名稱:在VOSO4水溶液中陰極沉積V2O5於鋁基材之研究
論文名稱(外文):Cathodic V2O5 Deposition on Al in VOSO4 aqueous solutions
指導教授:顏秀崗顏秀崗引用關係
指導教授(外文):S.K. Yen
學位類別:碩士
校院名稱:國立中興大學
系所名稱:材料工程學研究所
學門:工程學門
學類:材料工程學類
論文種類:學術論文
論文出版年:2001
畢業學年度:89
語文別:英文
論文頁數:74
中文關鍵詞:陰極沉積陰極VOSO4
外文關鍵詞:vanadiumaluminumLi-ion batterycathodecathodic depositionVOSO4
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本實驗是在VOSO4水溶液中,利用陰極沉積的方法,將V2O5薄膜沉積於鋁基材上。藉由控制不同的電化學參數(溶液、濃度、電位、電流、時間),和不同的燒結條件後,決定適當的鍍膜製程,並利用TGA/DSC、SEM/EDS、XRD及恆定電位儀,探討分析膜的物理特性及其電性。
由陰極極化實驗推論在VOSO4水溶液中陰極反應可分為三階段:(1)
(2)
(3)
由TGA/DSC曲線及XRD結果,可以推論電解沉積的機構及燒結反應機構為下:
且在T5溫度下燒結td之試片顯示出較佳V2O5薄膜之結晶性。而不同的濃度、酒精含量、沉積電位、電流及時間,則會有不同的表面型態。
在CV電性測試及放電實驗中,可看出V2O5在V2O5/LiPF6/Li系統之可逆性佳,且可對應出其工作電壓為3.17V。
Cathodic V2O5 deposition on Al was conducted in VOSO4 aqueous solutions. Compared to cathodic polarization curves in NaSO4, H2SO4 and HCl, cathodic reaction in VOSO4 could be divided into 3 stages: (1) , (2) and (3) .
Various kinds of thickness and surface morphology were obtained by controlling concentrations, applied potentials, applied currents and deposition times. Some deposited specimens were further characterized by TGA/DSC, SEM/EDS, XRD and cyclic voltammometry (CV) tests.
Results of TGA/DSC and XRD verified that the as-deposited film was VO(OH)2 at room temperature, then condensed into VO2 at 250℃, and further oxidized into V2O5 at 281℃. However, more crystalline V2O5 was found at T5 for td.
CV tests revealed that the reaction were reversible and its working voltage was 3.17V for V2O5/LiPF6/Li batteries.
Tables of Content
Abstract ………………………………………………Ⅰ
Tables of Contents …………………………………Ⅲ
List of Figures ………………………………………Ⅵ
List of Tables ………………………………………….Ⅶ
Chapter 1 Introduction
1-1 V2O5 …………………………………………………….1
1-2 Preparation of V2O5 films …………………………...1
1-3 Electrolytically cathodic deposition …………………...2
1-4 Objective ………………………………..…………….2
Chapter 2 Literature Review
2-1 Lithium Ion of the Battery Systems …………...…..4
2-1-1 Working Function …………………………….6
2-1-2 Intercalation Reaction ………………………...8
2-1-3 Anodes …………………………………………9
2-1-4 Electrolyte ……………………………………14
2-1-5 Cathode ………………………………………..16
2-2 Preparation of V2O5 …………………………………16
2-2-1 Sol-Gel …………………………………………16
2-2-2 PVD …………………………………………...17
2-2-3 Eletrochemical Preparation …………………18
Anodic Oxidization …………………………..18
Electrochemical Anodic Synthesis ……………19
2-3 Electrolytic Deposited ZrO2 and Al2O3 films …20
ZrO2 ………………………………………………..21
Al2O3 ……………………………………………….22
Chapter 3 Experimental Procedures ……………..23
3-1 Specimen preparation ……………………...………23
3-2 Cathodic polarization ……………...……………….24
3-3 Electrolytic deposition ……………………………...24
3-4 Drying in the moisture-proof box …………………….25
3-5 DTA & TGA ………………………………………….26
3-6 DSC ………………………………………………….26
3-7 Annealing ……………………………………………...28
3-8 X-ray diffraction analysis …………………………28
3-9 SEM / EDS …………………………………………...30
3-10 Fabrication of cells …………………………………31
3-11 Electrochemical measurement …..………………32
3-11-1 Cyclic voltammometry test ……………………..32
3-11-2 Charging and discharging tests ………………...32
Chapter 4 Results and Discussions ……………...34
4-1 Cathodic Polarization ………………………………34
4-2 DTA、TGA & DSC …………………………………36
4-3 X-ray diffraction (XRD) analysis …………………...37
4-4 SEM/EDS …………………………………………….40
4-7 Thickness ……………………………………………41
4-8 Electrochemical measurement ……………………43
Chapter 5 Conclusions ……………………………..44
Reference ……………………………………..…………46
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