Electrochemical Characteristics of Carbon Based Cathode Material with Molybdenum Sulfide Catalyst for Lithium Air Batteries

Wednesday, 31 May 2017
Grand Ballroom (Hilton New Orleans Riverside)
J. Kim, Y. Choi (Agency for Defense Development), M. H. Griep (U.S. Army Research Laboratory), Y. Jang, J. Cho, and H. Yoo (Agency for Defense Development)
Lithium air batteries have been recognized as one of expected next-generation military power sources, supplying power for a long time even in independent extreme environment. For the commercialization of lithium air batteries, it is essential to search for a cathode material capable of stable and efficient on electrochemical reaction at the interface with the electrolyte. Among the numerous cathode materials, such as carbon nanostructures, expensive noble material, and metal oxides, carbon-based materials are intensively researched as candidate oxygen electrode for lithium air batteries thanks to the engineering pore size and the competitive cost. However, they suffer from degradation of the carbon structure due to the formation of side products limiting the benefit of theirs oxygen reduction reaction characteristic. Recently, molybdenum sulfide(MoS2) has been received the attention as a promising catalyst to maximize oxygen reduction and evolution reactionon the carbon-based cathode. In this study, various shaped MoS2 were grown on activated carbon felt, and their electrochemical properties were compared and analyzed in order to attain a way to maximize the electrochemical reaction in electrode. We also investigated the structure and microstructure of the electrodes before and after discharge test to understand the relation between the performance of cathode materials under various synthesis condition of the catalyst for lithium air batteries.