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研究生:許嘉忻
研究生(外文):Hsu-chia Hsin
論文名稱:銅/錫表面鍍層對矽薄膜電化學特性之研究
論文名稱(外文):A study on the electrochemical properties for silicon thin film with Copper/Tin surface coating
指導教授:林新智林新智引用關係
指導教授(外文):Hsin-Chih Lin
學位類別:碩士
校院名稱:逢甲大學
系所名稱:材料科學所
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:2006
畢業學年度:94
語文別:中文
論文頁數:79
中文關鍵詞:鋰離子二次電池
外文關鍵詞:Siliconlithium ion batteriesTinCopper
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本研究選擇具有高電容量、蘊藏量豐富的矽作為薄膜電池負極材料,藉由調控表面鍍層之銅/錫來改善矽循環壽命不佳的缺點。表面鍍層的優點在於不使矽直接與電解液接觸,避免矽遭受電解液的破壞與進行充電過程中產生不可逆反應與副產物因而導致電容量損失。若將不具電化學活性的銅濺鍍在矽表面上,在進行充放電的過程中不會與鋰產生合金化反應,因此在矽薄膜表面鍍上適當厚度的銅或是給予適當熱處理,表面的銅能有效地保護包覆矽基地進而提升循環壽命。而將具有電化學活性的錫鍍於矽薄膜表面上,雖然矽與錫之間界面的存在會抑制鋰的嵌入與嵌出,不過能有效的避免矽直接與電解液接觸產生破壞,因此在充放電的過程中矽基地的破壞也會比較小所以能有較佳的循環性。
Si thin film anodes were prepared by using RF magnetron sputtering technique. Cu and Sn surface coatings were applied to enhance the cycling stability of the Si thin films. The films composed of active Si and inactive Cu were investigated as anode for lithium rechargeable batteries. It has been revealed that the electrochemical performance of Si/Cu films can be improved and optimized by controlling the thickness of Cu. The electrochemical performance of the Cu coated Si films can also be improved by heat treatment. In addition, the electrochemical performance of Sn coated Si thin films can also be enhanced without annealing.
總目錄
中文摘要…………………………………………………...……………II
英文摘要..................................................................................................III
總目錄…………………………………………………………………..IV
圖目錄………………………………………………………………….VII
表目錄………………………………………...……………………….. XI
第一章、緒論
1.1 薄膜電池概論……………………………………………………….1
1.2 研究動機…………………………………………………………….5
第二章、文獻回顧
2.1 鋰離子二次電池的起源與簡介…………………………………...10
2.1.1 鋰電池……………………………………………………………10
2.1.2 鋰離子二次電池…………………………………………………10
2.2 負極材料…………………………………………………………...12
2.2.1 石墨碳材…………………………………………………………12
2.2.2 鋰合金材料………………………………………………………14
2.2.3 矽…………………………………………………………………16
第三章、實驗方法
3.1 實驗流程…………………………………………………………...29
3.2 薄膜試片製備……………………………………………………...30
3.3 材料分析與量測技術……………………………………………...31
3.3.1 低掠角X光繞射儀(Grazing Incidence X-ray Diffractometer)…..31
3.3.2 掃描式電子顯微鏡(Scanning Electron Microscope) …………...32
3.3.3 歐傑電子能譜儀分析(Auger Electron Microscope)…………….32
3.4 電池元件組裝與電化學分析……………………………………...34
3.4.1 負極之電極製作…………………………………………………34
3.4.2 鈕扣型電池之組裝………………………………………………34
3.4.3 電池充放電性能測試……………………………………………34
3.4.4 循環伏安測試……………………………………………………35
第四章、實驗結果與討論
4.1 結晶結構
4.1.1 矽薄膜……………………………………………………………41
4.1.2 錫矽與銅矽複合薄膜……………………………………………41
4.2 膜厚量測與重量量測……………………………………………...42
4.3 縱深分析…………………………………………………………...43
4.4 微結構與表面型態………………………………………………...43
4.5 矽複合薄膜之電化學行為
4.5.1銅矽複合薄膜
4.5.1.1充放電性質……………………………………………………...45
4.5.1.2氧化還原反應…………………………………………………...46
4.5.1.3電池循環壽命 ………………………………………………….47
4.5.1.4 厚膜效應 ……………………………………………………...50
4.5.2 錫矽複合薄膜
4.5.2.1 充放電性質 …………………………………………………...51
4.5.2.2 氧化還原反應 ………………………………………………...51
4.5.2.3 電池循環壽命 ………………………………………………...52
4.5.2.4 厚膜效應 ……………………………………………………...53
第五章、結論…………………………………………………………..75
參考文獻………………………………………………………………..76
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