2021
DOI: 10.1149/osf.io/2gmxr
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Expanded in situ aging indicators for lithium-ion batteries with a blended NMC-LMO electrode cycled at sub-ambient temperature

Abstract: An important step toward safer and more reliable lithium-ion battery systems is the development of better methods for detection and characterization of battery degradation. For a method to be suitable for online application (e.g., onboard an electric vehicle), it must be simple, explanatory, and non-invasive. In this work, we develop and track aging indicators over the life of 18650-format lithium-ion batteries with a blended NMC532-LMO positive electrode and graphite negative electrode. Cells are cycled until… Show more

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Cited by 3 publications
(3 citation statements)
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“…The most pronounced change in the data is a horizontal shift towards higher potentials and horizontal expansion on the voltage axis. Similarly to ICA, this observed horizontal shift and expansion indicates LLI [64]. There is a hysteresis in the entropy profile response, which is shown in the bottom panel of Fig.…”
Section: Calendar Ageingmentioning
confidence: 72%
“…The most pronounced change in the data is a horizontal shift towards higher potentials and horizontal expansion on the voltage axis. Similarly to ICA, this observed horizontal shift and expansion indicates LLI [64]. There is a hysteresis in the entropy profile response, which is shown in the bottom panel of Fig.…”
Section: Calendar Ageingmentioning
confidence: 72%
“…3) Calendar degradation: To calculate the calendar life loss Q Cal we use SOS2 variables via Eqs. ( 23) to (25). Eq.…”
Section: ) Cycle Depth-based Degradationmentioning
confidence: 99%
“…We desire a degradation model usable in economic dispatch optimization that considers factors affected by operational decisions SOC, CD, and C-rate. Hence, we formulate degradation based on measurements of a specific battery cell [20], [25]. Total battery degradation equals the sum of calendar and cycle aging [7], [26]:…”
Section: Battery Degradationmentioning
confidence: 99%