Fine cathode particles prepared by solid-state reaction method using nano-sized precursor particles

• Published in: Journal of power sources 2007-12, Vol.174 (2), p.598-602
• Main Authors: Ju, Seo Hee, Koo, Hye Young, Hong, Seung Kwon, Jo, Eun Byul, Kang, Yun Chan
• Format: Article
• Language: English
• Subjects: Applied sciences; Cathode particle; 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; Lithium cobaltate; Lithium manganate; Spray pyrolysis
• ISSN: 0378-7753; 1873-2755
• DOI: 10.1016/j.jpowsour.2007.06.243

Fine-sized Li–Co–Mn–O cathode particles with various ratios of cobalt and manganese components were prepared by conventional solid-state reaction method using the nano-sized precursor particles. The nano-sized precursor particles of cobalt and manganese components were prepared by spray pyrolysis. The LiCo 1− x Mn x O 2 (0.1 ≤ x ≤ 0.3) particles had finer size than that of the pure LiCoO 2 particles. Manganese component disturbed the growth of the LiCo 1− x Mn x O 2 cathode particles prepared by solid-state reaction method. The initial discharge capacities of the layered LiCo 1− x Mn x O 2 (0 ≤ x ≤ 0.3) cathode particles decreased from 144 to 136 mAh g −1 when the ratios of Co/Mn components were changed from 1/0 to 0.7/0.3. The mean sizes of the spinel LiMn 2− y Co y O 4 (0 ≤ y ≤ 0.2) cathode particles decreased from 650 to 460 nm when the ratios of Mn/Co components were changed from 2/0 to 1.8/0.2. The initial discharge capacities of the LiMn 2− y Co y O 4 (0 ≤ y ≤ 0.2) cathode particles decreased from 119 to 86 mAh g −1 when the ratios of Mn/Co components were changed from 2/0 to 1.8/0.2.