文献类型：期刊文献

英文题名：Hydrothermal synthesis of novel Mn₃O₄ nano-octahedrons with enhanced supercapacitors performances

作者：Jiang, Hao[1,2];Zhao, Ting[2];Yan, Chaoyi[2];Ma, Jan[1,2];Li, Chunzhong[3]

机构：[1]Nanyang Technol Univ, Temasek Labs, Singapore 637553, Singapore;[2]Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore;[3]E China Univ Sci & Technol, Key Lab Ultrafine Mat, Minist Educ, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2010

卷号：2

期号：10

起止页码：2195

外文期刊名：NANOSCALE

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000282686200043)】；

基金：This work was supported by the National Natural Science Foundation of China (20925621), the Program of Shanghai Subject Chief Scientist (08XD1401500), the Shanghai Shuguang Scholars Tracking Program (08GG09).

语种：英文

摘要：Uniform and single-crystalline Mn3O4 nano-octahedrons have been successfully synthesized by a simple ethylenediaminetetraacetic acid disodium salt (EDTA-2Na) assisted hydrothermal route. The octahedron structures exhibit a high geometric symmetry with smooth surfaces and the mean side length of square base of octahedrons is similar to 160 nm. The structure is reckoned to provide superior functional properties and the nano-size achieved in the present work is noted to further facilitate the material property enhancement. The formation process was proposed to begin with a "dissolution-recrystallization'' which is followed by an "Ostwald ripening'' mechanism. The Mn3O4 nanooctahedrons exhibited an enhanced specific capacitance of 322 F g(-1) compared with the truncated octahedrons with specific capacitances of 244 F g(-1), making them a promising electrode material for supercapacitors.