Mg-Ni儲氫合金之研究

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Title:	Mg-Ni儲氫合金之研究
Authors:	許哲瑋;Che-Wei Hsu
Contributors:	機械工程研究所
Keywords:	儲氫合金;metal hydride;mg2ni
Date:	2006-06-29
Issue Date:	2009-09-21 11:54:18 (UTC+8)
Publisher:	國立中央大學圖書館
Abstract:	由於傳統能源消耗日益增加，環境汙染問題也日趨嚴重，許多國家已積極進行新能源之開發，氫能應用也隨之受到重視，從產氫、儲氫、氫輸送至氫能應用等，世界各國均投入相當的人力與物力，其目的在尋求一高效率與低污染之氫能利用方式，本研究即著重於氫氣儲存領域的研究與開發，而在各種氫氣儲存方式研究中，金屬氫化物具有體積小、質量密度高、操作壓力低與安全性高等優點，因此被視為氫氣儲存領域之重點研究課題。其中，Mg基儲氫合金因具有儲氫量高、質量輕、原料成本低廉之優點而被視為相當有潛力之儲氫合金系統，但由於Mg蒸氣壓大，且Mg（649℃）與在儲氫應用上所需搭配之元素如Ni（1455℃）、Cu（1085℃）等元素其熔點差異甚大，因此傳統熔煉法無法成功熔配出大量高純度Mg基儲氫合金，如Mg2Ni、Mg2Cu等。因此本研究分為兩部分，第一部分研究著重於高純度Mg2Ni儲氫合金新製程開發研究，改良傳統熔煉法之缺點，利用本實驗室所開發之新製程恆IECP（專利申請中），製備高純度Mg2Ni儲氫合金。第二部分則利用IECP法所製備之Mg2Ni儲氫合金，觀察其外觀結構與微結構變化，並進行不同溫度下之吸放氫性質測試。 In recent years, there has been a dramatic research concerned with metal hydrides. Metal hydrides offer a safe alternative to storage in compressed or liquid form. Moreover, metal hydrides have the highest volumetric capacity of storage. In this point, the A2B type compound Mg2Ni is considered as one of the interesting hydrogen absorbing materials with its low weight, abundance on the earth’s crust and high hydrogen storage capacity of 3.6 mass％. However, it is thought to be impossible to produce pure Mg2Ni directly by conventional melting because of the large difference melting point and the high vapor pressure of Mg. In this paper, we propose a useful methods IECP to fabricate pure Mg2Ni. Furthermore, the microstructure of pure Mg2Ni will be observed and the storage performances obtained with pure Mg2Ni under different temperatures are reported.
Appears in Collections:	[Graduate Institute of Mechanical Engineering] Electronic Thesis & Dissertation

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