期刊
JOURNAL OF POWER SOURCES
卷 235, 期 -, 页码 5-13出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2013.01.182
关键词
Spinel lithium manganese oxide; Carbon nanotube; Composite electrode material; Electrochemical performance; Rate capability; Aqueous electrolyte
资金
- Leading Academic Discipline Project of Shanghai Municipal Education Commission [J50102]
This paper reports a spinel-type LiMn2O4/carbon nanotube (CNT) composite cathode material with high electrochemical performance for energy storage applications. The composite material is prepared by hydrothermal reaction between birnessite MnO2/multiwalled carbon nanotube (MWCNT) composite and LiOH solution, followed by heat treatment at 700 degrees C in air atmosphere, where the MnO2/MWCNT precursor is obtained by in situ redox reaction between KMnO4 solution and MWCNTs. The heat treated LiMn2O4/CNT composite material consists of well-crystallized spinel LiMn2O4 with small amount of enwrapped segmented carbon nanotubes, which is confirmed by X-ray diffraction and transmission electron microscopy. Electrochemical experimental results demonstrate that the LiMn2O4/CNT composite material heat treated for 8 h exhibits high specific capacity and excellent high-rate capability in 5 M LiNO3 aqueous electrolyte. The (LiMn2O4/CNT)/5 M LiNO3/activated carbon hybrid supercapacitor with this LiMn2O4-based composite material as the cathode presents excellent high-power capability and good charge/discharge cyclability. (c) 2013 Elsevier B.V. All rights reserved.
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