Affiliation:
1. Batteries & Electrolysis The hydrogen and fuel cell center (ZBT) Carl-Benz-Straße 201 47057 Duisburg Germany
2. Lehrstuhl Energietechnik University Duisburg-Essen Lotharstraße 8 47048 Duisburg Germany
Abstract
AbstractLithium‐sulfur batteries have the potential to replace lithium‐ion batteries in the future due to their high theoretical capacity and energy density but suffer from low cycling stability caused by the polysulfide shuttle. This work demonstrates a reduction of the polysulfide shuttle and increased cycling stability by using iron oxide and chromium oxide as additives for a simply fabricated lithium sulfide cathode. Adsorption isotherms were recorded, and monolayer adsorption capacities were determined for a better understanding of the interactions between transition metal oxides and polysulfides. A significant reduction of the shuttle mechanism can be deduced from the cyclization experiments. Similarly, the catalytic influence of chromium oxide and iron oxide on the oxidation could be shown by cyclic voltammetry.
Subject
Inorganic Chemistry,Organic Chemistry,Physical and Theoretical Chemistry,Catalysis