Cylindrical Graphite/LiFePO_4 Commercial Batteries Cycled at High Current Densities Study by Post Mortem Analysis

摘要

Lithium ion battery technology is today playing a key role in the development of high power and energy densities devices. To boost the quality of this technology, it is vital to gain a deeper understanding of the causes leading to the battery end of life and loose of performance. In fact, Li-ion battery manufacturers have to deal most of all with problems concerning the cells aging in order to ensure long-term reliability and safety. In this context, determination of degradation mechanisms and their correlation with cell performances is essential for the production of a new cell concept that can meet targeted lifetimes [1-3].