<i>In operando</i> signature and quantification of lithium plating

Rangarajan, Sobana P.; Barsukov, Yevgen; Mukherjee, Partha P.

doi:10.1039/c9ta07314k

Cited by 59 publications

(40 citation statements)

References 43 publications

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“…We believe that our work presents a highly challenging scenario, as we show that the deposited TMs can promote the formation of extremely thick Li metal deposits in NCM‐based full cells operated at high‐voltage. As the formation and growth of Li metal deposits is rather unpredictable and depends on various parameters, [75−77] it is highly important to gain further fundamental knowledge for the reasons and underlying mechanisms.…”

Section: Resultsmentioning

confidence: 99%

Exploiting the Degradation Mechanism of NCM523Graphite Lithium‐Ion Full Cells Operated at High Voltage

et al. 2020

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Layered oxides, particularly including Li[NixCoyMnz]O2 (NCMxyz) materials, such as NCM523, are the most promising cathode materials for high‐energy lithium‐ion batteries (LIBs). One major strategy to increase the energy density of LIBs is to expand the cell voltage (>4.3 V). However, high‐voltage NCM∥ graphite full cells typically suffer from drastic capacity fading, often referred to as “rollover” failure. In this study, the underlying degradation mechanisms responsible for failure of NCM523∥ graphite full cells operated at 4.5 V are unraveled by a comprehensive study including the variation of different electrode and cell parameters. It is found that the “rollover” failure after around 50 cycles can be attributed to severe solid electrolyte interphase growth, owing to formation of thick deposits at the graphite anode surface through deposition of transition metals migrating from the cathode to the anode. These deposits induce the formation of Li metal dendrites, which, in the worst cases, result in a “rollover” failure owing to the generation of (micro‐) short circuits. Finally, approaches to overcome this dramatic failure mechanism are presented, for example, by use of single‐crystal NCM523 materials, showing no “rollover” failure even after 200 cycles. The suppression of cross‐talk phenomena in high‐voltage LIB cells is of utmost importance for achieving high cycling stability.

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Section: Resultsmentioning

confidence: 99%

Exploiting the Degradation Mechanism of NCM523Graphite Lithium‐Ion Full Cells Operated at High Voltage

et al. 2020

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“… 16 Different methods have been used to tackle the drift in the measured reference potential such as surface engineering and pretreatment of the reference electrode or introducing a calibration cycle after every 10 cycles. 17 , 18 …”

Section: Scope Of Three-electrode Cell Architecture As An Operando Analytics Toolboxmentioning

confidence: 99%

3ε–A Versatile Operando Analytics Toolbox in Energy Storage

et al. 2021

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The performance and safety of lithium-ion batteries are plagued by several diverse, nonlinear aging mechanisms influenced by the electrochemical thermal interactions at the electrodes, usage history, and operating conditions. Understanding and deconvoluting the fundamental reaction mechanisms responsible for electrode degradation are key for developing technologies in Li-ion battery diagnostics and prognostics. Hence, there exists a need for high-precision operando techniques to investigate and characterize distinct electrode degradation modes over a gamut of operational variability. Cells embedded with a stable, nonpolarizable reference electrode offer an in situ and operando tool to decouple the complex electrochemical interplay between the electrode pair by measuring individual electrode responses simultaneously with the cell response in the time and frequency domains. This perspective comprehensively looks at 3-electrode (3ε) analytics as a versatile toolbox, highlighting recent techniques and parameters developed with an emphasis on degradation diagnostics and control strategies that is expected to drive the futuristic design of battery management systems.

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“…[6] Building on the previous experience, [6][7][8][9] we aim to devise a compact component that enables relatively simple implementation into pouch-cell systems with stable reference electrodes. [10][11][12] Standard reference electrodes work on the principle of maintaining a stable equilibrium potential by controlling the concentration of the various reacting chemical species at the electrode/ DOI: 10.1002/ente.202100602 Despite growing demand for Li-ion batteries in the portable, industrial, and electric vehicle markets, the performance and safety monitoring of these state-ofthe-art rechargeable cells is quite limited, relying on conventional full-cell measurements with in situ reference electrode technologies lagging behind in application. Herein, for the first time a long-term (>2000 h) stable Ti-based reference electrode is reported, and a new design enabling impact-free implementation into pouch.…”

Section: Introductionmentioning

confidence: 99%

Ti‐Based Reference Electrodes for Inline Implementation into Lithium‐Ion Pouch Cells

2021

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In operando signature and quantification of lithium plating

Abstract: In operando detection and quantification of lithium plating is critical toward understanding the deleterious consequences under operational extremes in Li-ion batteries.

Cited by 59 publications

References 43 publications

Exploiting the Degradation Mechanism of NCM523Graphite Lithium‐Ion Full Cells Operated at High Voltage

Exploiting the Degradation Mechanism of NCM523Graphite Lithium‐Ion Full Cells Operated at High Voltage

3ε–A Versatile Operando Analytics Toolbox in Energy Storage

Ti‐Based Reference Electrodes for Inline Implementation into Lithium‐Ion Pouch Cells

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