Synthesis and characterization of high tap-density layered Li[Ni1/3Co1/3Mn1/3]O2 cathode material via hydroxide co-precipitation

• Published in: Journal of power sources Vol. 158; no. 1; pp. 654 - 658
• Main Authors: XUFANG LUO, XIANYOU WANG, LI LIAO, GAMBOA, Sergio, SEBASTIAN, P. J
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier Sequoia 01-07-2006
• Subjects: Applied sciences; Direct energy conversion and energy accumulation; Electrical engineering. Electrical power engineering; Electrical power engineering; Electrochemical conversion: primary and secondary batteries, fuel cells; Exact sciences and technology; Measurement; Scanning electron microscopy; Particle size; Heat treatment; Lithium Nickel Cobalt Manganese Oxides; Cathode; Secondary cell; Transition metal; Electrode material; Dispersive spectrometry; Discharge charge cycle; Lithium battery; Characterization; Capacity retention; Discharge capacity; Lithium ion battery; X ray diffractometry; Chemical synthesis; Co-precipitated spherical metal hydroxide; Li[Ni1/3Co1/3Mn1/3]O2
• ISSN: 0378-7753; 1873-2755
• DOI: 10.1016/j.jpowsour.2005.09.047

Li[Ni1/3Co1/3Mn1/3]O2 was prepared by mixing uniform co-precipitated spherical metal hydroxide (Ni1/3Co1/3Mn1/3)(OH)2 with 7% excess LiOH followed by heat-treatment. The tap-density of the powder obtained was 2.38gcm-3, and it was characterized using X-ray diffraction (XRD), particle size distribution measurement, scanning electron microscope-energy dispersive spectrometry (SEM-EDS) and galvanostatic charge-discharge tests. The XRD studies showed that the material had a well-ordered layered structure with small amount of cation mixing. It can be seen from the EDS results that the transition metals (Ni, Co and Mn) in Li[Ni1/3Co1/3Mn1/3]O2 are uniformly distributed. Initial charge and discharge capacity of 185.08 and 166.99mAhg-1 was obtained between 3 and 4.3V at a current density of 16mAg-1, and the capacity of 154.14mAhg-1 was retained at the end of 30 charge-discharge cycles with the capacity retention of 93%.