利用噴霧熱解法製備氧化錳粉體之研究

Preparation of Manganese Oxide Powder by Spray Pyrolysis

林信輝(H. H. Lin) ； 陳錦毅(C. Y. Chen) ； 蔡健益(C. Y. Tsay) ； 林中魁(C. K. Lin)

《材料科學與工程》 38卷2期 (2006/06) Pp. 116-120

https://doi.org/10.6409/JMSE.200606.0116

摘要

近年來，超級電容器已廣泛地應用在儲能元件上，其所使用的金屬氧化物電極中，氧化錳由於成本較低且具有多種氧化價數變化的特性，爲氧化物電極材料的較佳選擇之一。本研究利用噴霧熱解法以醋酸錳做爲先驅物製備氧化錳粉體。藉由改變不同熱解溫度及先驅物濃度製備氧化錳粉體，利用X光繞射分析儀(X-ray diffractometry, XRD)分析其生成相的組成和熱分析方法(thermogravimetric analysis, TGA)分析其醋酸錳先驅物的相轉變，並使用掃描式電子顯微鏡(sanning electron microscopy, SEM)觀察粉體的表面型態和統計量測其粉體粒徑的大小。結果顯示，所製備的氧化錳粉體之晶體結構爲Mn3O4，其粒徑的大小隨著先驅物濃度的降低，粒徑有減小的趨勢。

關鍵字

超級電容器 ； 氧化錳 ； 噴霧熱解

並列摘要

In recent years, supercapacitors have been widely considered to be promising devices in applications of high energy storage. Among the metal oxide electrode materials, manganese oxide exhibit to be possible candidate due to its low cost and several valence states. In the present study, manganese oxide powders were prepared by spray pyrolysis from the precursor of manganese acetate solution with various concentrations at different pyrolysis temperatures. The phase identifications of the as-prepared powders were performed by X-ray diffractometry (XRD). Thermogravimetric analysis (TGA) revealed the phase transitions of the manganese acetate. Scanning electron microscopy (SEM) showed the morphologies and the particle size distributions of the resulting powders. The results showed that the as-obtained manganese oxide powders were identified as Mn3O4 structure. Moreover, the particle size of the resulting powders tended to decrease with the decrease of precursor concentration.

並列關鍵字

supercapacitor ； manganese oxide ； spray pyrolysis