Dischage of Lithium-Oxygen Power Source: Effect of Active Layer Thickness and Current Density on Overall Characteristics of Positive ElectrodeстатьяИсследовательская статья
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Дата последнего поиска статьи во внешних источниках: 13 мая 2020 г.
Аннотация:A distinctive feature of discharge of the lithium–oxygen power source (LOPS) with nonaqueous electrolyte is the filling of the positive electrode pores by lithium peroxide that is not soluble in the electrolyte and is characterized by low conductivity. Generally, the cathodic discharge process can be carried out only in a comparatively thin, several tens of micrometers, porous layer bordering on the gas phase. Therefore, the capacity per 1 cm2 of the outer cathode surface proves to be small. In this connection, the problem arises of developing more advanced LOPS and providing efficient performance of the active layers of the positive electrode at an increase in their thickness to achieve higher overall characteristics. In this work, the authors obtain experimental dependences of the positive electrode capacity on the active layer thickness and various current density values. Theoretical analysis of the obtained experimental data is performed. Here, the issues that are of considerable interest of the LOPS discharge theory are discussed.