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利用乳化沉澱法合成磷酸鋰鐵/碳複合材料之研究 = Synthesis o...

國立高雄大學應用化學系碩士班

利用乳化沉澱法合成磷酸鋰鐵/碳複合材料之研究 = Synthesis of LiFePO4/C Composite by the Emulsion-Precipitation Route

紀錄類型:	書目-語言資料,印刷品 : 單行本
並列題名:	Synthesis of LiFePO4/C Composite by the Emulsion-Precipitation Route
作者:	鄭思齊,
其他團體作者:	國立高雄大學
出版地:	[高雄市]
出版者:	撰者;
出版年:	民99[2010]
面頁冊數:	83面圖，表 : 30公分;
標題:	鋰離子電池
標題:	Lithium-ion battery
電子資源:	http://handle.ncl.edu.tw/11296/ndltd/43212467383378084361
摘要註:	磷酸鋰鐵具有製備成本低、結構熱穩定性佳、安全性佳、無毒性、高能量密度、高輸出功率等優點，未來可望運用於電動車輛的動力來源，具有很高的發展潛力。然而磷酸鋰鐵在應用上有兩大缺點，分別為導電度差與鋰離子擴散限制。　　本研究藉由乳化沉澱法製備磷酸鋰鐵/碳複合材料，利用界面活性劑有效地製備奈米級沉澱粒子，而且殘留於粒子表面的界面活性劑經熱裂解形成碳，可均勻披覆於粒子表面，增加材料的導電度。經由 X-ray 粉末繞射儀、動態光散射粒徑分析儀、BET 比表面積分析、掃描式電子顯微鏡、穿透式電子顯微鏡、元素分析儀、循環伏安法、交流阻抗分析及充放電測試，顯示使用 Brij® 30 微乳化系統可製備出直徑小於 100 nm 的磷酸鋰鐵粒子，在 0.1 C 放電速率下電容為 127 mAh/g，在 10 C 放電速率下電容仍可維持 89 mAh/g。 LiFePO4 cathode composite materials possess many properties attractive for use in electric vehicles. These properties include, but are not limited to, high theoretical capacity (170 mAh/g), environmental friendliness, low cost, high thermal stability, and good cycle stability. It has recently been shown that cathodes prepared with LiFePO4 have very low, Li-ion diffusion limited, electronic conductivity. To prepare LiFePO4 cathode materials with greater conductivity and mobility of Li-ions, we prepared several LiFePO4/C composite powders by emulsion-precipitation. Emulsion-precipitation, when used in conjunction with surfactants, can yield LiFePO4/C composites consisting of carbon coated nanoparticles with improved conductivity and mobility of Li-ions through the matrix. Samples prepared with this method were analyzed and it was determined that samples prepared with Brij® 30 are less than 100 nm in size and their discharge capacities are 127 mAh/g at 0.1 C and 89 mAh/g at 10 C.

利用乳化沉澱法合成磷酸鋰鐵/碳複合材料之研究 = Synthesis of LiFePO4/C Composite by the Emulsion-Precipitation Route
鄭, 思齊

利用乳化沉澱法合成磷酸鋰鐵/碳複合材料之研究 = Synthesis of LiFePO4/C Composite by the Emulsion-Precipitation Route / 鄭思齊撰 - [高雄市] : 撰者, 民99[2010]. - 83面 ; 圖，表 ; 30公分.
參考書目：面.
鋰離子電池Lithium-ion battery

利用乳化沉澱法合成磷酸鋰鐵/碳複合材料之研究 = Synthesis of LiFePO4/C Composite by the Emulsion-Precipitation Route
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