Comparative study on experiments and simulation of blended cathode active materials for lithium ion batteries

Appiah, Williams Agyei; Park, Joonam; Khue, Luu Van; Lee, Yun-Ju; Choi, Jaecheol; Ryou, Myung Hyun; Lee, Yong Min

doi:10.1016/j.electacta.2015.11.029

Cited by 52 publications

(43 citation statements)

References 31 publications

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“…For example, LG Chem Ltd. developed such a lithium-ion battery for the hybrid vehicle Chevrolet Volt that was produced by General Motors in 2010/11. 1,3 LiMn 2 O 4 shows good performance characteristics at high discharge rates while providing high material availability and low procurement costs. 4 The disadvantage of LMO is the relatively low usable capacity during discharge, the low cyclic aging resistance and its low electrochemical performance at elevated temperatures.…”

Section: Discussionmentioning

confidence: 99%

“…In order to generate synergies regarding power and energy density, blended electrodes consisting of LMO and NMC are frequently used. For example, LG Chem Ltd. developed such a lithium‐ion battery for the hybrid vehicle Chevrolet Volt that was produced by General Motors in 2010/11 …”

Section: Introductionmentioning

confidence: 99%

“… LiMn 2 O 4 shows good performance characteristics at high discharge rates while providing high material availability and low procurement costs . The disadvantage of LMO is the relatively low usable capacity during discharge, the low cyclic aging resistance and its low electrochemical performance at elevated temperatures . Compared with LMO, the NMC active material has a 22.5% higher gravimetric energy density and a mean equilibrium potential that is about 5% lower …”

Section: Introductionmentioning

confidence: 99%

“…There have been plenty of experimental investigations on blended electrodes in the past . But as this approach targeting the optimization of blended electrodes in general proves to be time‐consuming and expensive due to the complexity of the system, the cost of materials, and the required measuring equipment.…”

Section: Introductionmentioning

confidence: 99%

“…Appiah et al experimentally and numerically investigated the electrochemical behavior of blended electrodes consisting of LMO and Li [ Ni 0.6 Co 0.2 Mn 0.2 ] O 2 . The numerical studies were also carried out using the pseudo‐2D model, which was extended to model several active components.…”

Section: Introductionmentioning

confidence: 99%

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Three‐dimensional simulation of transport processes within blended electrodes on the particle scale

et al. 2019

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Summary An electrochemical model that is capable to simulate charge and species transport within the three‐dimensional particulate cathode structure of lithium‐ion battery half‐cells is applied to blended electrodes. The electrodes are assumed to consist of physical mixtures of LiMn2O4 (LMO) and Li[Ni1/3Co1/3Mn1/3]O2 (NMC) as cathode active materials. The results of the numerical simulations reveal that there is a significant temporal variation in the distribution of the intercalation current between the active materials on the particulate level. In this context, the LMO component was found to be electrochemically inactive at the beginning and at the end of a simulated discharge process that leads to the identification of a suitable operating window of the half‐cells between 0.2 < DOD < 0.8. It is shown that within this range, a relaxation of the maximum lithium concentration gradients within the NMC component is achievable. As this provides indications of reduced mechanical stresses within the active material particles, an increased cycling stability of this kind of blended electrodes is expectable. Because of the NMC component's higher volumetric capacity compared with LMO, the separator‐near arrangement of NMC allows the magnitude of ionic current density to be reduced by up to 11% compared with a random particle arrangement. As this indicates a reduction of potential temperature‐induced side reactions of the electrolyte, an increased cycle life of the half‐cells, especially for high‐performance applications, is anticipated. Consequently, multiple‐layer coating processes appear particularly attractive for the production of optimized blended positive electrodes for lithium‐ion batteries.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Three‐dimensional simulation of transport processes within blended electrodes on the particle scale

et al. 2019

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Lithiophilic MXene‐Guided Lithium Metal Nucleation and Growth Behavior

Kim

Lim

et al. 2021

Adv Funct Materials

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The positive effects of a lithiophilic substrate on the electrochemical performance of lithium metal anodes are confirmed in several reports, while the understanding of lithiophilic substrate‐guided lithium metal nucleation and growth behavior is still insufficient. In this study, the effect of a lithiophilic surface on lithium metal nucleation and growth behaviors is investigated using a large‐area Ti3C2Tx MXene substrate with a large number of oxygen and fluorine dual heteroatoms. The use of the MXene substrate results in a high lithium‐ion concentration as well as the formation of uniform solid–electrolyte‐interface (SEI) layers on the lithiophilic surface. The solid–solid interface (MXene‐SEI layer) significantly affects the surface tension of the deposited lithium metal nuclei as well as the nucleation overpotential, resulting in the formation of uniformly dispersed lithium nanoparticles (≈10–20 nm in diameter) over the entire MXene surface. The primary lithium nanoparticles preferentially coalesce and agglomerate into larger secondary particles while retaining their primary particle shapes. Subsequently, they form close‐packed structures, resulting in a dense metal layer composed of particle‐by‐particle microstructures. This distinctive lithium metal deposition behavior leads to highly reversible cycling performance with high Columbic efficiencies > 99.0% and long cycle lives of over 1000 cycles.

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Porous Electrode Modeling and its Applications to Li‐Ion Batteries

Chen

Danilov

Eichel

et al. 2022

Advanced Energy Materials

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Figure 12. a-c) Schematic representation of the electrode potential at electrode/electrolyte interfaces. [145] Red areas indicate the electrode region and blue the electrolyte region. a) The Butler-Volmer approach does not consider charges at the interface. b) More detailed representation of the electrode/ electrolyte interface, considering specifically adsorbed species (green area) and screening counter charges at the surface of the electrode (dark red) and in the electrolyte (dark blue). c) Reduced electrode/electrolyte interface considering the surface charge in the electrode and screening charge in the electrolyte. d) Typical examples of impedance spectra for a porous electrode with insertion-type reactions. [151] Impedance simulations of porous graphite electrodes in contact with electrolyte with e) various particle sizes and f) electrode porosities. [152] a-c) Reproduced with permission. [145]

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Comparative study on experiments and simulation of blended cathode active materials for lithium ion batteries

Cited by 52 publications

References 31 publications

Three‐dimensional simulation of transport processes within blended electrodes on the particle scale

Three‐dimensional simulation of transport processes within blended electrodes on the particle scale

Lithiophilic MXene‐Guided Lithium Metal Nucleation and Growth Behavior

Porous Electrode Modeling and its Applications to Li‐Ion Batteries

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