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Established safety of lithium ion batteries is key for the vast diversity of applications. The influence of aging on the thermal stability of individual cell components and complete cells is of particular interest. Commercial 18650-type lithium ion batteries based on LiNi0.5Co0.2Mn0.3O2/C are investigated after cycling at different temperatures. The variations in the electrochemical performance are...
A comprehensive analysis of the degradation mechanisms on the surface of commercial LiNi0.5Co0.2Mn0.3O2 electrodes is presented. Irregularly distributed particle cracking and the formation of a cathode electrolyte interphase on the surface of the active material were identified to be the main degradation mechanisms. The particle cracking originates from inhomogeneity of the composite electrode, leading...
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