Journal article
Mesoporous Co3O4 nanosheets-3D graphene networks hybrid materials for high-performance lithium ion batteries
Beijing National Center for Electron Microscopy, The State Key Laboratory of New Ceramics and Fine Processing, School of Material Science and Engineering, Tsinghua University, Beijing 100084, P. R. China Beijing National Center for Electron Microscopy, The State Key Laboratory of New Ceramics and Fine Processing, School of Material Science and Engineering, Tsinghua University Beijing 100084 P. R. China1
Laboratory of Advanced Materials, Department of Material Science and Engineering, Tsinghua University, Beijing 100084, P. R. China Laboratory of Advanced Materials Department of Material Science and Engineering Tsinghua University Beijing 100084 P. R. China2
School of Resources and Materials, Northeastern University at Qinhuangdao, Qinhuangdao 066004, P. R. China School of Resources and Materials Northeastern University at Qinhuangdao Qinhuangdao 066004 P. R. China3
Department of Petrochemical, Northeast Petroleum University at Qinhuangdao, Hebei, Qinhuangdao 066004, P. R. China Department of Petrochemical Northeast Petroleum University at Qinhuangdao, Hebei Qinhuangdao 066004 P. R. China4
Nanomaterials Research group (NRG), Physics Division, PINSTECH, P.O. Nilore, Islamabad 44000, Pakistan Nanomaterials Research group (NRG) Physics Division PINSTECH P.O. Nilore Islamabad 44000 Pakistan5
Mesoporous Co3O4 nanosheets-3D graphene networks (3DGN) hybrid materials have been synthesized by combining chemical vapor deposition (CVD) and hydrothermal method and investigated as anode materials for Li-ion batteries (LIBs). Microscopic characterizations have been performed to confirm the 3DGN and mesoporous Co3O4 nanostructures.
The specific surface area and pore size of the hybrid structures have been found ∼ 34.5 m2g−1 and ∼ 3.8nm respectively. It has been found that the Co3O4/3DGNs composite displays better LIB performance with enhanced reversible capacity, good cyclic performance and rate capability as compare with Co3O4/CNT and Co3O4 structures.
Electrochemical impedance spectroscopy (EIS) results show that the addition of 3DGN not only preserves high conductivity of the composite electrode, but also largely enhanced the electrochemical activity of Co3O4 during the cycling processes. The improved electrochemical performance is considered due to the addition of 3DGNs which prevent the cracking of electrode.
In addition, the large specific surface area and porous nature of the Co3O4 nanosheets are also very convenient and accessible for electrolyte diffusion and intercalation of Li+ ions into the active phases. Therefore, this combination can be considered to be an attractive candidate as an anode material for LIBs.
| Language: | English |
|---|---|
| Year: | 2014 |
| Pages: | 1-9 |
| ISSN: | 18733859 , 00194686 and 00134686 |
| Types: | Journal article |
| DOI: | 10.1016/j.electacta.2013.11.181 |
