Active electrode materials for lithium-ion battery

AbstractNanoproducts spherical spinel lithium manganese oxide (LiMnO) with about 20 nm in diameter was synthesized by explosive method. The growth of lithium manganate via detonation reaction was investigated with respect to the presence of an energetic precursor, such as the metallic nitrate and the degree of confinement of the explosive charge. The detonation products were characterized by scanning electron microscopy. Powder X-ray diffraction and transmission electron microscopy were used to characterize the products. Lithium manganate with spherical morphology and more uniform secondary particles, with smaller primary particles of diameters from 10 to 30 nm and a variety of morphologies were found. Lithium manganate with a fine spherical morphology different from that of the normal spinel is formed after detonation wave treatment due to the very high quenching rate. It might also provide a cheap large-scale synthesis method. Explosive detonation is strongly nonequilibrium processes, generating a short duration of high pressure and high temperature. Free metal atoms are first released with the decomposition of explosives, and then theses metal and oxygen atoms are rearranged, coagulated and finally crystallized into lithium manganate during the expansion of detonation process.Keywords: Nanoproductslithium manganese compoundsdetonation Additional informationFundingThis work was supported by the Anhui Provincial Program for the Tackling Key Problem (07010302189), the Program for the Provincial Innovation Research and Development Team of Anhui Provincial Universities (TD200705), the Program for the University Innovation Research and Development Team of Anhui University of Science and Technology, the 2007 Municipal Natural Science Foundation of Huainan and the Doctoral Fund of Anhui University of Science and Technology.