Insights into Cycling Aging of LiNi0.80Co0.15Al0.05O2 Cathode Induced by Surface Inhomogeneity: A Post-mortem Analysis

Zhu, Xinhua; Revilla, Reynier I.; Jaguemont, Joris; Mierlo, Joeri Van; Hubin, Annick

doi:10.1021/acs.jpcc.9b07767

Cited by 18 publications

(16 citation statements)

References 57 publications

(160 reference statements)

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“…[ 18,19 ] Consequently, the preferential reaction on the positive electrode side can significantly deteriorate the integrity of the cathode with an uneven consumption of cyclable lithium in the full‐cell. [ 20 ] In this way, the intrinsic fragility of conventional NCM particles may trigger reaction heterogeneity at a very early stage. However, this critical drawback of the NCM particles associated with its intrinsic morphological characteristics has rarely been systematically addressed.…”

Section: Figurementioning

confidence: 99%

Boosting Reaction Homogeneity in High‐Energy Lithium‐Ion Battery Cathode Materials

et al. 2020

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Conventional nickel‐rich cathode materials suffer from reaction heterogeneity during electrochemical cycling particularly at high temperature, because of their polycrystalline properties and secondary particle morphology. Despite intensive research on the morphological evolution of polycrystalline nickel‐rich materials, its practical investigation at the electrode and cell levels is still rarely discussed. Herein, an intrinsic limitation of polycrystalline nickel‐rich cathode materials in high‐energy full‐cells is discovered under industrial electrode‐fabrication conditions. Owing to their highly unstable chemo‐mechanical properties, even after the first cycle, nickel‐rich materials are degraded in the longitudinal direction of the high‐energy electrode. This inhomogeneous degradation behavior of nickel‐rich materials at the electrode level originates from the overutilization of active materials on the surface side, causing a severe non‐uniform potential distribution during long‐term cycling. In addition, this phenomenon continuously lowers the reversibility of lithium ions. Consequently, considering the degradation of polycrystalline nickel‐rich materials, this study suggests the adoption of a robust single‐crystalline LiNi0.8Co0.1Mn0.1O2 as a feasible alternative, to effectively suppress the localized overutilization of active materials. Such an adoption can stabilize the electrochemical performance of high‐energy lithium‐ion cells, in which superior capacity retention above ≈80% after 1000 cycles at 45 °C is demonstrated.

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Section: Figurementioning

confidence: 99%

Boosting Reaction Homogeneity in High‐Energy Lithium‐Ion Battery Cathode Materials

et al. 2020

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“…In addition, the heterogeneity of microstructure leading to non-uniform current, temperature and SOC, and thus non-uniform aging, is believed to be one of the main factors aggravating the degradation of electrodes. [50,51] For a given chemistry and application, there is an SOC operating range beyond which capacity loss and permanent damage will occur. Therefore, highly heterogeneous electrodes can cause SOC disparities, resulting in uneven aging of the cell.…”

Section: Microstructural Heterogeneitymentioning

confidence: 99%

Impact of Electrode Defects on Battery Cell Performance: A Review

Limé

Lein

Maletti

et al. 2022

Batteries & Supercaps

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The continuing rise of electric mobility is driving demand for lithium‐ion batteries to unprecedented levels. To ensure efficient production of high quality, yet affordable battery cells, while making the best use of available raw materials and processes, reasonable quality assurance criteria are needed. A step of particular importance, affecting all downstream processes, lies in electrode manufacturing including mixing, coating, drying, and calendering. Several classes of defects which originate in these processes are well‐known and detectable using various methods. The crucial point, however, lies in the quantification of their electrochemical significance, i. e., in an evaluation, which defect types, sizes and concentrations can be tolerated without impacting cell performance. Herein, we review the still scarce literature on that topic. It is found that, although the impact of some defects is quite well understood, others almost completely lack an evaluation of their criticality. We finally make suggestions for further studies paving the way to deduce knowledge‐based quality assurance criteria for the large variety of coating defects occurring in lithium‐ion battery electrodes.

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“…The state-ofthe-art monitoring approaches are mostly based on conventional parameters i.e., voltage, current and temperature, and assisted by the Coulomb counting method, however it becomes insufficient in more complex usage conditions [53]. Applying the fast-charging in a mismatched SoC region (i.e., low or high SoC region) leads to accelerated aging effects on batteries such as the destabilization of the lattice structure, the release of lattice oxygen, side (electro)chemical reactions and excessive heat generation etc, leading to a rapid degradation of the batteries and safety hazards [54][55][56][57]. Many researchers thus are shifting their focus to more physics-oriented strategies providing direct insights towards the battery materials [58].…”

Section: Operando Orp-eis For Monitoring Of Libs Under Various Chargi...mentioning

confidence: 99%

“…The profile of 15 °C displays the highest polarization, the profile of 45 °C displays the lowest polarization, and the profile of 25 °C is in the middle. This trend could be partially attributed to variations of kinetics because of different temperature as discussed in Figure 5(a), and partially attributed to thermodynamics since the electrode potential is temperature dependent [49,54]. In general, monitoring the cell voltage could be sufficient for elementary battery charge/discharge management, but it is not able to provide further insights of the running batteries, especially when more complex conditions are considered instead of temperature only.…”

Section: Operando Orp-eis For Monitoring Of Libs Under Various Chargi...mentioning

confidence: 99%

Operando odd random phase electrochemical impedance spectroscopy as a promising tool for monitoring lithium-ion batteries during fast charging

Zhu

Hallemans²,

Wouters³

et al. 2022

Journal of Power Sources

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Insights into Cycling Aging of LiNi_0.80Co_0.15Al_0.05O₂ Cathode Induced by Surface Inhomogeneity: A Post-mortem Analysis

Abstract: Insights into Cycling Aging of LiNi 0.80 Co 0.15 Al 0.05 O 2 Cathode Induced by

Cited by 18 publications

References 57 publications

Boosting Reaction Homogeneity in High‐Energy Lithium‐Ion Battery Cathode Materials

Boosting Reaction Homogeneity in High‐Energy Lithium‐Ion Battery Cathode Materials

Impact of Electrode Defects on Battery Cell Performance: A Review

Operando odd random phase electrochemical impedance spectroscopy as a promising tool for monitoring lithium-ion batteries during fast charging

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