Presenter: Christian Lund Jakobsen
Title: Disordered MnOx Li-ion Cathode Through One Step Synthesis
Affiliation: University of Southern Denmark
Abstract
Layered LiMO2 (M = Co, Mn, Ni, Fe etc.), especially LiNixMnyCozO2 (LNMCO) are still among the most exploited electrode materials for commercial rechargeable Li-ion batteries. Unfortunately, they suffer from high cost and toxicity due to Co as well as poor thermal stability due to Ni. To overcome these issues, Mn-based oxide materials are receiving significant attention during the last decade due to the low cost and toxicity of Mn and the discovery of manganese oxides with specific capacities ≥ 250 mAh/g.
In this work, a disordered ramsdellite-like MnOx have been synthesized using low-temperature hydrothermal synthesis. Surprisingly, the disordered material exhibits good electrochemical performance as Li-ion cathode as opposed to a crystalline manganese phosphate obtained from similar synthesis. We have investigated the structural and compositional details about the disordered phase as well as insight into the Li-ion intercalation mechanism.