E 43 Electrochemical oxidation of carbon in a 62/38 mol % Li/K carbonate melt [Text] / W. H. A. Peelen [et al.] // Journal of Applied Electrochemistry. - 2000. - V. 30, N 12. - P1389-1395. - Bibliogr.: p. 1394-1395 (22 ref.) . - ISSN 0021-891X Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): РАСПЛАВЫ КАРБОНАТНЫЕ -- КАРБОНАТНЫЕ РАСПЛАВЫ -- ТОПЛИВНЫЙ ЭЛЕМЕНТ -- ЭЛЕМЕНТЫ ТОПЛИВНЫЕ -- УГЛЕРОД -- УГОЛЬ -- ОКИСЛЕНИЕ ЭЛЕКТРОХИМИЧЕСКОЕ -- ЭЛЕКТРОХИМИЧЕСКОЕ ОКИСЛЕНИЕ -- Li-K -- Li -- K -- ЛИТИЙ -- КАЛИЙ -- ХИМИЯ Аннотация: The electrochemical gasification of coal to CO in a direct carbon fuel cell (DCFC) has thermodynamical advantages, including the conversion of heat into power at a reversible efficiency of 100 %. Molten carbonate fuel cell (MCFC) technology may form the basis for constructing DCFC's. Here the electrochemical oxidation of carbon in a 62/38 mol % Li/K carbonate melt is studied using impedance spectroscopy (IS) and cyclic voltammetry (CV). A set of equilibria is introduced which fully describes the electrochemical equilibrium of the system. From IS it is shown that for temperatures lower than 700 C, charge transfer is the slowest step, while at higher temperatures a second unidentified step also contributes significantly to the d.c. resistance of the electrode |