Preparation and Electrochemical Performance of Li[Ni_1/3Co_1/3Mn_1/3]O₂ Synthesized Using Li₂CO₃ as Template

Porous structure Li[Ni_1/3Co_1/3Mn_1/3]O₂ has been synthesized via a facile carbonate co-precipitation method using Li₂CO₃ as template and lithium-source. The physical and electrochemical properties of the materials were examined by many characterizations including TGA, XRD, SEM, EDS, TEM, BET, CV, EIS and galvanostatic charge-discharge cycling. The results indicate that the as-synthesized materials by this novel method own a well-ordered layered structure α-NaFeO₂ [space group: R-3m(166)], porous morphology, and an average primary particle size of about 150 nm. The porous material exhibits larger specific surface area and delivers a high initial capacity of 169.9 mAh·g⁻¹ at 0.1 C (1 C=180 mA·g⁻¹) between 2.7 and 4.3 V, and 126.4, 115.7 mAh·g⁻¹ are still respectively reached at high rate of 10 C and 20 C. After 100 charge-discharge cycles at 1 C, the capacity retention is 93.3%, indicating the excellent cycling stability.