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研究生：	黃韋程 Huang, wei-cheng
論文名稱：	利用三維多孔碳奈米結構提升二氧化錫陽極材料於鋰離子電池循環穩定性之研究 The Cycling Performance Study of Tin Dioxide Loading in Three Dimensional Porous Carbon as Anode Electrode for Lithium Ion Batteries
指導教授：	陳家俊 Chen, Chia-Chun
學位類別：	碩士 Master
系所名稱：	化學系 Department of Chemistry
論文出版年：	2015
畢業學年度：	103
語文別：	中文
論文頁數：	74
中文關鍵詞：	鋰離子電池、三維多孔碳、二氧化錫、海藻酸
英文關鍵詞：	lithium ion battery, porous carbon, tin dioxide, alginate
論文種類：	學術論文
相關次數：	點閱：155 下載：0
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二氧化錫是近年來鋰離子電池中備受矚目的陽極材料，因為二氧化錫具有很高的比電容量(782mAhg-1)等優點，但其最大的缺點是在鋰離子嵌入材料後，體積會膨脹造成電容量快速地衰減。本研究利用商用碳酸鈣奈米粒子為模板，蔗糖為碳源合成三維多孔碳奈米材料，經由水熱法製備二氧化錫/三維多孔碳複合材料。
多孔碳結構具有高表面積、高孔隙體積、高導電度等優點，可以解決二氧化錫本身導電度不足的缺點，此外，本研究使用海藻酸黏著劑並於電解液中添加FEC改善充放電過程中SEI不穩定等問題，使二氧化錫/三維多孔碳複合材料在電流密度1000 mAg-1下充放電一百次，其電容量仍保有462 mAhg-1以及98%以上的庫倫效率。

Tin dioxide as a promising anode material in Lithium ion batteries, offer a high theoretical gravimetric Li-storage capacity of 782 mAhg-1，which is more than twice that currently commercialized graphite (372 mAhg-1). However, like many other alloying anode materials, a large volume change during electrochemically alloy formation can lead to rapid deterioration of the electrode, thus greatly limiting the practical use of the SnO2 anode materials. In this study, we prepare a porous carbon by using commercial CaCO3 nanoparticle as template and sucrose as carbon source follow by 900℃high-temperature calcination. SnO2/porous carbon composites are synthesized by hydrothermal method, and served as anode of rechargeable Lithium ion batteries. The porous carbon structure with a high specific surface area, high pore volume and high electronic conductivity that can provide stable electronic transfer channel for SnO2/porous carbon composites. At 1.27C rate, the SnO2/porous carbon composites electrode prepared by using alginate as a binder and fluoroethylene carbonate(FEC) added to the electrolyte exhibited discharge capacity of 462mAhg-1 after 100 cycle.

摘要 ..........................................................................................................1
Abstract ......................................................................................................2
第一章     緒論..............................................................................................3
1-1前言..............................................................................................3
1-2鋰離子電池歷史(從鋰金屬電池到鋰離子電池) ......................4
第二章 原理與文獻回顧 ........................................................................6
2-1鋰離子電池工作原理與組成......................................................6
2-2電解液..........................................................................................8
2-2-1電解液對固態電解質(SEI)介面的影響........................10
2-3隔離膜........................................................................................12
2-4鋰離子電池陰材料簡介............................................................13
2-5鋰離子電池的陽極材料............................................................16
2-5-1金屬錫負極材料.............................................................16
2-5-2錫氧化物負極材料.........................................................22
2-5-3二氧化錫負極材料.........................................................23
第三章 研究動機與實驗........................................................................31
3-1研究動機....................................................................................31
3-2實驗藥品....................................................................................32
3-3儀器設備....................................................................................33
3-4材料鑑定與分析........................................................................34
3-4-1 XRD (X-ray Diffraction)粉末繞射分析........................34
3-4-2掃描式電子顯微鏡(SEM)..............................................34
3-4-3穿透式電子顯微鏡(TEM)..............................................35
3-4-4熱重分析儀(TGA)..........................................................35
3-5三維多孔碳製備........................................................................36
3-6三維多孔碳/二氧化錫複合材料合成方法...............................37
3-7電極片製備................................................................................38
3-8鈕扣型電池的組裝....................................................................41
3-9鈕扣型電池充放電之測試........................................................42
3-9-1一般充放電測試.............................................................42
3-9-2交流阻抗(AC Impedance)分析......................................42
3-9-3循環伏安法(Cyclic Voltammetry)之分析......................43
第四章 結果與討論................................................................................45
4-1二氧化錫特性............................................................................45
4-2三維多孔碳................................................................................47
4-3二氧化錫/三維多孔碳複合材料...............................................51
4-4不同黏著劑之影響....................................................................56
4-5電解液添加劑............................................................................59
4-6高電流密度測試........................................................................63
4-7交流阻抗分析............................................................................66
第五章 結論............................................................................................70
參考文獻..................................................................................................71

                                

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