期刊
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
卷 26, 期 4, 页码 2189-2197出版社
SPRINGER
DOI: 10.1007/s10854-015-2666-3
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类别
资金
- Natural Science Foundation of China [51172132, 51272144, 51472127]
- Key Laboratory of Pulp and Paper Science & Technology of Minstry of Education of China
We have developed hollow MnO/C composite by using impregnation method and followed by heat treatment. One dimensional hollow MnO nanotubes are dispersed inside the partially graphited carbon matrix. As an anode for Li-ion batteries, the well-designed hollow MnO/C composite deliver a reversible capacity of 680.7 mAh g(-1) at 0.2 A g(-1) after 190 cycles. After 180 cycles at varied current densities from 0.2 to 2 A g(-1), this anode still delivered a high discharge capacity of 476.9 mAh g(-1) and nearly 100 % coulombic efficiency. We also have experimentally realized a maximal discharge specific energy of 425 Wh kg(-1). The well-designed hollow hybrid structure assists in overcoming the issues associated with using manganese oxide in Li-ion batteries, such as poor electric conductivity, volumetric expansion and structural instability during the electrochemical process. Such hollow MnO/C composite could be used as a class of electrode materials for developing high performance Li-ion batteries.
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