Spinel phase LiMn2O4 is of great interest as cathode materials for lithium-ion batteries. We describe here a new combustion method to synthesize LiMn2O4 directly from lithium nitrate, manganese nitrate, ammonium nitrate and glycol. The resultant LiMn2O4 synthesized under the optimum synthesis conditions shows perfect spinel structure and uniform particle size distribution. The combustion products were characterized by scanning electron microscopy. And, powders X-ray diffraction and transmission electron microscopy were used to characterize the products. Lithium manganate with approximately 100nm agglomeration morphology and more uniform secondary particles, with smaller primary particles of diameters from 30 to 100nm and a variety of morphologies were found. It might also provide a cheap large-scale synthesis method. Reagents combustion with the addition of ammonium nitrate is strongly nonequilibrium processes. Free metal atoms are first released with the decomposition of reagents, and then theses metal and oxygen atoms are rearranged, coagulated and finally crystallized into lithium manganate during the expansion of combustion process.
[1]Anhui Univ Sci & Technol, Sch Med, Huainan 232001, Peoples R China.
[2]Fudan Univ, Sch Journalism, Shanghai 200433, Peoples R China.
[3]Anhui Univ Sci & Technol, Sch Chem Engn, Huainan 232001, Peoples R China.
(8.0+极速模式)