Análisis del rendimiento para el ciclo de vida de las baterías de iones de litio: un estudio de caso del cátodo LiNi 0.6 Co 0.2 Mn 0.2 O 2
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RevActaNova.
Abstract
Resumen: La cantidad de energía y potencia disponible en una batería de iones de litio (LIB) disminuye gradualmente con el tiempo debido a la degradación que depende de una variedad de mecanismos de envejecimiento. En este estudio, se desarrolló una aplicación computacional confiable para analizar de manera rápida y meticulosa el rendimiento de ciclo de una celda simple o múltiple (media o completa). Además, se puede estimar la vida útil del ciclo basándose en las tendencias de envejecimiento del comportamiento cíclico, evalúa el mejor voltaje de corte superior; identifica y cuantifica la evolución de los mecanismos de envejecimiento que afectan el rendimiento de ciclado. La aplicación fue utilizada para el análisis de pruebas cíclico como voltaje, carga/ corriente de descarga, tiempo y número de ciclos fueron medidos para medias celdas de LiNi0.6Co0.2Mn0.2O2 (NMC622) sometidas a ciclos de 60 veces a diferentes voltajes límite de carga (4.3, 4.4, 4.5 y 4.6) V. Se determinó que el mejor rendimiento del ciclo de vida de las medias celdas NMC622/Li se obtuvo para un voltaje límite de carga de 4.3 V.
Abstract: The amount of energy and power available in a Li-ion battery (LIB) decrease gradually over time due to degradation that depends on a variety of aging mechanisms. In this study, a reliable computational application was developed to quickly and meticulously analyze the cycling performance of a single or multiple (half or full) cell. It also estimates cycle life based on the aging tendencies of cycling behavior, evaluates the best upper cutoff voltage; identifies and quantifies the evolution of aging mechanisms that affect cycling performance. The application was used for cyclic test analysis such as voltage, charge/discharge current, time, and number of cycles were measured for LiNi0.6Co0.2Mn0.2O2 (NMC622) half-cells cycled 60 times at different charge limit voltages (4.3, 4.4, 4.5, and 4.6) V. It was determined that the best cycle life performance of the NMC622/Li half-cells was obtained for a charge limit voltage of 4.3 V.
Abstract: The amount of energy and power available in a Li-ion battery (LIB) decrease gradually over time due to degradation that depends on a variety of aging mechanisms. In this study, a reliable computational application was developed to quickly and meticulously analyze the cycling performance of a single or multiple (half or full) cell. It also estimates cycle life based on the aging tendencies of cycling behavior, evaluates the best upper cutoff voltage; identifies and quantifies the evolution of aging mechanisms that affect cycling performance. The application was used for cyclic test analysis such as voltage, charge/discharge current, time, and number of cycles were measured for LiNi0.6Co0.2Mn0.2O2 (NMC622) half-cells cycled 60 times at different charge limit voltages (4.3, 4.4, 4.5, and 4.6) V. It was determined that the best cycle life performance of the NMC622/Li half-cells was obtained for a charge limit voltage of 4.3 V.
Description
Vol. 11, No. 3