Probing Thermally Induced Decomposition of Delithiated Li_(1.2_x)Ni_(0.15)Mn_(0.55)Co_(0.1)O2 by in Situ High-Energy X-ray Diffraction

摘要

Safety of lithium-ion batteries has been a major barrier to large-scale applications. For better understanding the failure mechanism of battery materials under thermal abuse, the decomposition of a delithiated high energy cathode material, Li_(1.2-x)Ni_(0.15)Mn_(0.55)Co_(0.1)O2. in the stainless-steel high pressure capsules was investigated by in situ high energy X-ray diffraction. The data revealed that the thermally induced decomposition of the delithiated transition metal (TM), oxide was strongly influenced by the presence of electrolyte components.