Chapters authored
Composite Cathode Material for Li-Ion Batteries Based on LiFePO4 System.
Part of the book: Metal, Ceramic and Polymeric Composites for Various Uses
Cathode Electronic Structure Impact on Lithium and Sodium Batteries Parameters
The author of this work basing on her own investigations of AxMO2 cathode materials (A = Li, Na; M = 3d) has demonstrated that the electronic structure of these materials plays an important role in the electrochemical intercalation process. The proposed electronic model of intercalation is universal and has outstanding significance with regard to tailoring the properties of electrode materials to the most efficient application in Li-ion and Na-ion batteries. The paper reveals correlation between electronic structure, transport, and electrochemical properties of layered LixCoO2, LixNi1−y−zCoyMnzO2 and NaxCoO2 cathode material and explains of apparently different character of the discharge/charge curve in LixCoO2 (monotonous curve) and NaxCoO2 systems (step-like curve). Comprehensive experimental studies of physicochemical properties of LixNi1−y−zCoyMnzO2 cathode material (XRD, electrical conductivity, and thermoelectric power) are supported by electronic structure calculations performed using the Korringa-Kohn-Rostoker method with the coherent potential approximation (KKR-CPA) to account for chemical disorder. It is found that even small oxygen defects (~1%) may significantly modify DOS characteristics via formation of extra broad peaks inside the former gap leading to its substantial reduction.
Part of the book: Lithium-ion Batteries