Synthesis optimization of Li1 + x[Mn0.45Co0.40Ni0.15]O2 with different spherical sizes via co-precipitation

✍ Scribed by Tao Wang; Zong-Huai Liu; Lihong Fan; Yinfeng Han; Xiuhua Tang

• Book ID: 104088872
• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 882 KB
• Volume: 187
• Category: Article
• ISSN: 0032-5910
• DOI: 10.1016/j.powtec.2008.02.002

✦ Synopsis

Li 1 + x [Mn 0.45 Co 0.40 Ni 0.15 ]O 2 spherical cathode materials with different sizes (about 2 and 5 μm) were fabricated by calcining uniform spherical metal carbonate, [Mn 0.45 Co 0.40 Ni 0.15 ]CO 3 with lithium hydroxide at high temperature. The precursor of spherical metal carbonate, [Mn 0.45 Co 0.40- Ni 0.15 ]CO 3 , was obtained via co-precipitation method at room temperature, which was significantly dependent on synthetic conditions, such as the reaction temperature, the concentration of NH 4 HCO 3 , and stirring speed, etc. The optimized condition resulted in [Mn 0.45 Co 0.40 Ni 0.15 ]CO 3 , of which the particle size distribution was uniform and the particle shape was spherical. The final products, Li 1 + x [Mn 0.45 Co 0.40 Ni 0.15 ]O 2 , had a well-ordered layered structure and uniform homogeneity. Raman spectroscopy analysis showed the Raman-active species E g and A 1g modes were observed at 488, 473 cm -1 and 597, 590 cm -1 , respectively, for the obtained spherical cathode materials.