Degradation diagnosis of lithium-ion batteries with a LiNi0.5Co0.2Mn0.3O2 and LiMn2O4 blended cathode using dV/dQ curve analysis

Ando, Kanae; Matsuda, Tomoyuki; Imamura, Daichi

doi:10.1016/j.jpowsour.2018.04.043

Cited by 58 publications

(40 citation statements)

References 25 publications

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“…Various battery degradation models such as [30] use the curve fitting model to calculate the remaining battery lifetime

()(, L false(x false))

depending on battery‐specific parameters (i.e. a and b ) and DoD denoted by x in the following equation:

L false(x false) = \frac{a}{x^{b}}

Several experimental studies such as by Gao et al [30] and Ando et al [31] also examine Li‐ion degradation considering different variables such as SoC windows. Nevertheless, both only demonstrate result for under 3500 cycles.…”

Section: Bess Modelling and Simulationmentioning

confidence: 99%

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Techno‐economic potential of battery energy storage systems in frequency response and balancing mechanism actions

Kirli

Kiprakis

2020

J. eng.

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“…Various battery degradation models such as [30] use the curve fitting model to calculate the remaining battery lifetime

()(, L false(x false))

depending on battery‐specific parameters (i.e. a and b ) and DoD denoted by x in the following equation:

L false(x false) = \frac{a}{x^{b}}

Section: Bess Modelling and Simulationmentioning

confidence: 99%

“…Several experimental studies such as by Gao et al [30] and Ando et al [31] also examine Li-ion degradation considering different variables such as SoC windows. Nevertheless, both only demonstrate result for under 3500 cycles.…”

Section: Basic Assumptionsmentioning

confidence: 99%

Techno‐economic potential of battery energy storage systems in frequency response and balancing mechanism actions

Kirli

Kiprakis

2020

J. eng.

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“…In addition, an engineering approach has been adopted to enhance electrode performance by mixing two different types of active materials, thus producing a so‐called ‘blended electrode’. Compared to electrodes with a single active material, blended electrodes exhibit superior performance, power capability, cyclability, and thermal stability [1–4] . For positive electrodes, blended electrodes consisting of various combinations of layered, spinel, and olivine materials have been investigated [5–8] .…”

Section: Introductionmentioning

confidence: 99%

Experimental Measurement and Quantification of the Local Cell Reaction in Blended Lithium Insertion Electrodes

Ariyoshi

Suzuki

2022

ChemElectroChem

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Blended electrodes in which two types of active materials are mixed exhibit synergetic effects due to the interplay between different active materials. Although a local cell reaction within the electrode plays an important role in the blended electrodes, its nature is not yet known because of difficulties associated with experimental measurements. In this study, we developed a method for measuring the local cell reaction using a blended electrode containing a mixture of Li[Ni 1/2 Mn 3/2 ]O 4 and Li-[Li 0.1 Al 0.1 Mn 1.8 ]O 4 . The rate of the local cell reaction was successfully quantified using the change in the open-circuit potential after high-current discharge. The current for the local cell reaction (I LCR ) decreased in inverse proportion to the relaxation time after current interruption. I LCR could be formulated using t 0 , a parameter representing the time at which the local cell reaction started, and α, a coefficient representing the rate of the local cell reaction.

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“…The same methods have been applied to cells which contain composite electrodes, such as Si-Gr. 35,36 Anseán et al modelled the behaviour of a Si-Gr/NMC cell during ageing, and showed that the LAM of the two components of the NE can be decoupled, allowing insights into the way in which these composite electrodes age. 36 The profile of the NE voltage curve will change depending on the relative fractions of the two active materials, allowing insights into the way in which these composite electrodes age.…”

Section: Introductionmentioning

confidence: 99%

Lithium-Ion Battery Degradation: Measuring Rapid Loss of Active Silicon in Silicon-Graphite Composite Electrodes

Kirkaldy

Samieian

Offer

et al. 2022

Preprint

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In an effort to increase the specific energy of lithium-ion batteries, silicon additives are often blended with graphite (Gr) in the negative electrode of commercial cells. However, due to the large volumetric expansion of silicon upon lithiation, these Si-Gr composites are prone to faster rates of degradation than conventional graphite electrodes. Understanding the effect of this difference is key to controlling degradation and improving cell lifetimes. Here, we investigate the effects of state of charge and temperature on the ageing of a commercial cylindrical cell with a Si-Gr electrode (LG M50T). Using degradation mode analysis, we were able to quantify the rates of degradation for Si and Gr separately. Loss of active Si is shown to be worse than Gr under all operating conditions, but especially at low state of charge and high temperature, with up to 80% loss in Si capacity after 4 kA h of charge throughput (~400 equivalent full cycles). The results indicate cell lifetimes can be improved by limiting the depth of discharge of cells containing Si-Gr, which suggests Si is not beneficial for all applications. The degradation mode analysis methods developed here provide valuable new insight into the causes of cell ageing by separating the effects of the two active materials in the composite electrode. These methods provide a suitable framework for data analysis of any experimental investigations on cells involving composite electrodes.

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Degradation diagnosis of lithium-ion batteries with a LiNi0.5Co0.2Mn0.3O2 and LiMn2O4 blended cathode using dV/dQ curve analysis

Cited by 58 publications

References 25 publications

Techno‐economic potential of battery energy storage systems in frequency response and balancing mechanism actions

Techno‐economic potential of battery energy storage systems in frequency response and balancing mechanism actions

Experimental Measurement and Quantification of the Local Cell Reaction in Blended Lithium Insertion Electrodes

Lithium-Ion Battery Degradation: Measuring Rapid Loss of Active Silicon in Silicon-Graphite Composite Electrodes

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