کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1293275 | 973524 | 2011 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Mesoporous nano-Co3O4: A potential negative electrode material for alkaline secondary battery Mesoporous nano-Co3O4: A potential negative electrode material for alkaline secondary battery](/preview/png/1293275.png)
A potential negative electrode material (mesoporous nano-Co3O4) is synthesized via a simple thermal decomposition of precursor Co(OH)2 hexagonal nanosheets in the air. The structure and morphology of the samples are characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). It is found that the nano-Co3O4 is present in mesoporous hexagonal nanoparticles. The average size of holes is about 5–15 nm. The electrochemical performances of mesoporous nano-Co3O4 as the active starting negative electrode material for alkaline secondary battery are investigated by galvanostatic charge–discharge and cyclic voltammetry (CV) technique. The results demonstrate that the prepared mesoporous nano-Co3O4 electrode displays excellent electrochemical performance. The discharge capacity of the mesoporous nano-Co3O4 electrode can reach 436.5 mAh g−1 and retain about 351.5 mAh g−1 after 100 cycles at discharge current of 100 mA g−1. A properly electrochemical reaction mechanism of mesoporous nano-Co3O4 electrode is also constructed in detail.
► Mesoporous nano-Co3O4 is hexagonal nanoparticles with the average size around 100 nm.
► The average size of holes is about 5–15 nm.
► Mesoporous nano-Co3O4 as the negative material for alkaline secondarybattery for the first time.
► The discharge capacity of the mesoporous nano-Co3O4 reached 436.5 mAh g−1.
► The capacity after 100 cycles was still 351.5 mAh g−1.
Journal: Journal of Power Sources - Volume 196, Issue 24, 15 December 2011, Pages 10758–10761