Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6618018 | Electrochimica Acta | 2013 | 6 Pages |
Abstract
As a positive electrode material for Li-ion batteries, xLi2MnO3·(1 â x)LiMO2 (M = Mn, Ni, Co) boasts various advantages compared to LiCoO2, such as higher specific charge (â¼250 Ah/kg) and lower cobalt content. However, the oxygen release reaction at â¼4.5 V vs. Li+/Li is not fully understood. xLi2MnO3·(1 â x)LiMO2 has been characterized by a combination of complementary methods, including electrochemical cycling at different temperatures, differential electrochemical mass spectrometry (DEMS), in situ pressure measurement, and in situ temperature measurement. The reaction at â¼4.5 V vs. Li+/Li leads to the exothermic release of oxygen and a significant pressure build-up in the cell. Despite this, the electrochemical performance of the material is very promising. Finally, it is shown that the cells should be operated close to room temperature.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Patrick Lanz, Heino Sommer, Martin Schulz-Dobrick, Petr Novák,