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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 呂宗昕 | |
dc.contributor.author | Wen-Yuan Lee | en |
dc.contributor.author | 李文淵 | zh_TW |
dc.date.accessioned | 2021-06-08T02:45:47Z | - |
dc.date.copyright | 2018-03-01 | |
dc.date.issued | 2017 | |
dc.date.submitted | 2017-11-02 | |
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dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/20344 | - |
dc.description.abstract | 本文以溶膠凝膠法合成LiFePO4正極材料粉體,使用天然洋菜粉做為螯合劑及碳源。研究不同洋菜粉濃度及煅燒溫度對LiFePO4粉體合成之影響。發現提高洋菜粉濃度可降低LiFePO4粉體合成所需之溫度。當洋菜粉19wt%時,在煅燒溫度700℃下可合成單相LiFePO4粉體。當洋菜粉濃度提高至12wt%時,可合成單相LiFePO4粉體之煅燒溫度下降至500℃。合成之LiFePO4粉體經Rietveld計算為斜方晶系橄欖石結構,屬於pnmb空間群。另外提高洋菜粉濃度,可降低LiFePO4粉體之粒徑。煅燒溫度700℃時,當添加之洋菜粉濃度由3 wt%提高至9 wt%,LiFePO4粉體之平均粒徑由1.42μm降至0.87μm。由上述結果可知添加洋菜粉作為螯合劑可降低合成單相LiFePO4粉體所需之溫度,並縮小LiFePO4粉體之粒徑大小及粒徑分布。 | zh_TW |
dc.description.abstract | LiFePO4 cathode powders were synthesized via sol-gel method. Natural agar powders were used as the chelating agents and carbon sources in this study. The influence of the various agar concentration and calcination temperature in the synthesis of LiFePO4 powder was studied. When the concentration of the agar was below 3 wt%, the single-phase LiFePO4 powder could not be synthesized. As the concentration of agar was increased to 6 wt%, single phase LiFePO4 powder was successfully synthesized at calcination temperature of 700 ℃. When the concentration of agar increased to 12 wt%, the least calcination temperature required to synthesize pure LiFePO4 powder reduced to 500 ℃. The Rietveld refinement analysis revealed the structure of the synthesized powder as orthorhombic with a space group as pbnm. Moreover, the increase in the concentration of agar reduced the particle sizes of LiFePO4 powders. When the concentration of the agar content was increased from 3wt% to 9wt% the average particle size of LiFePO4 powder decreased from 1.42μm to 0.87μm after 700℃-calcination. From the above results, it was seen that the addition of the agar powders reduced the required temperature for the synthesizing single-phased LiFePO4 powder and decreased the particle size and corresponding distribution of the LiFePO4 powders. | en |
dc.description.provenance | Made available in DSpace on 2021-06-08T02:45:47Z (GMT). No. of bitstreams: 1 ntu-106-R04524090-1.pdf: 3477179 bytes, checksum: 9997f9777b192a43e27cc6384e7596c8 (MD5) Previous issue date: 2017 | en |
dc.description.tableofcontents | 摘要 ⅱ
目錄 iⅱ 表目錄 ⅳ 圖目錄 ⅴ 第一章 緒論 1 1-1 前言 1 1-2 鋰離子二次電池發展及工作原理 2 1-2-1發展背景與趨勢 2 1-2-2工作原理 4 1-3 鋰離子二次電池之陰極材料 5 1-3-1陰極材料簡介 5 1-3-2 LiFePO4結構及特性 9 1-4 LiFePO4限制及改善方法 13 1-4-1 LiFePO4缺陷 13 1-4-2 LiFePO4改善 14 1-4-3 LiFePO4電池之應用: 15 1-5 LiFePO4合成方法 16 1-5-1碳熱還原法 16 1-5-2水熱法 16 1-5-3共沉澱法 17 1-5-4溶膠凝膠法 17 1-6 實驗目的 18 第二章 研究方法與實驗方法 19 2-1 XRD分析 19 2-2 SEM分析 25 2-3 Particle Size分析 28 2-4 實驗步驟 31 第三章 天然洋菜粉作為螯合劑之溶膠凝膠法合成LiFePO4粉體 33 3-1 添加洋菜粉對LiFePO4合成之影響 33 3-2 不同洋菜粉濃度及煅燒溫度對LIFEPO4合成之影響 37 第四章 結論 50 參考目錄 51 | |
dc.language.iso | zh-TW | |
dc.title | LiFePO4正極材料之製備與特性分析 | zh_TW |
dc.title | Preparation and Characterization of LiFePO4
Cathode Materials | en |
dc.type | Thesis | |
dc.date.schoolyear | 106-1 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 溫政彥,黃文正 | |
dc.subject.keyword | 鋰離子電池,溶膠凝膠法,洋菜粉,LiFePO4, | zh_TW |
dc.subject.keyword | Lithium ion battery,Cathode material,agar,LiFePO4, | en |
dc.relation.page | 55 | |
dc.identifier.doi | 10.6342/NTU201704336 | |
dc.rights.note | 未授權 | |
dc.date.accepted | 2017-11-02 | |
dc.contributor.author-college | 工學院 | zh_TW |
dc.contributor.author-dept | 化學工程學研究所 | zh_TW |
顯示於系所單位: | 化學工程學系 |
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