期刊
JOURNAL OF POWER SOURCES
卷 196, 期 24, 页码 10758-10761出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2011.08.086
关键词
Mesoporous; Nano-Co3O4; Active starting material; Electrochemical performance; Alkaline secondary battery
资金
- MOST [2010CB631303]
- NSFC [50971071, 51071087]
- MOE [IRT-0927]
- Nature Science Foundation of Tianjin [11JCYBJC07700, 09JCZDJC24800]
- Tianjin Sci Tech [10SYSYJC27600]
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. (C) 2011 Elsevier B.V. All rights reserved.
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