Фізико-хімічні та електрохімічні властивості нанорозмірного Li[Li0,033Mn1,967]O4

• Datum: 2011
• Hauptverfasser: Potapenko, A. V., Chernukhin, S. I., Romanova, I. V., Kirillov, S. А.
• Format: Artikel
• Sprache: Russisch
• Veröffentlicht: Chuiko Institute of Surface Chemistry National Academy of Sciences of Ukraine 2011
• Online Zugang: https://www.cpts.com.ua/index.php/cpts/article/view/87
• Назва журналу: Chemistry, Physics and Technology of Surface

By means of the thermal decomposition of a citrate precursor, lithium-manganese spinel Li[Li0.033Mn1.967]O4 has been obtained. The material has the crystallite size of <30 nm, specific surface area of about 10 m2/g, and the pore diameter of about 10–30 ?; the crystallites are joined into aggregates of 200–400 nm size. Theoretical specific capacity of Li[Li0.033Mn1.967]O4 calculated within approximation of the absence of vacancies equals to 110 mAh/g and the experimental one – to 105–110 mAh/g. Electrochemical studies on the samples fired at 700°С as cathodes of lithium ion batteries evidence the absence of discharge capacity fading within 100 cycles and the capability to discharge electrodes with great currents. In particular, at the current density of 1480 mА/g (11,1 С) the reversible capacity equals to more than the half of the theoretical capacity of the material.