Polarization Study and AC-Impedance Measurement in the Horizontal Plane of a Lithium-ion Battery Using Eight Reference Electrodes

Mitsuda, Kenro; Hara, Satoshi; Takemura, Daigo

doi:10.5796/electrochemistry.84.861

Cited by 4 publications

(1 citation statement)

References 27 publications

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“…The third category of materials comprises binary lithium alloys, the most common of which is the Li-Sn alloy. 3,15,16 Li-Al 17 , Li-Au 18 , and Li-Bi 6 alloys also have been recommended as RE materials for impedance and potential measurements. Lithium-alloy materials require a lithiation pretreatment to produce a stable reference potential.…”

Section: Introductionmentioning

confidence: 99%

Testing Lithium-Ion Battery with the Internal Reference Electrode: An Insight into the Blocking Effect

Chu

Feng

Liaw

et al. 2018

J. Electrochem. Soc.

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Long-term stability of reference electrode is a major issue in lithium-ion batteries. A composite Ni-Li reference electrode (RE) with a longer lifetime than traditional Cu-wire Li reference electrodes is proposed in this study. However, the larger size of the Ni-Li RE creates a blocking effect when positioned internally in the battery. The blocking effect manifests as an abnormal feature in the measured electrode potential. A two-dimensional (2D) finite element model of the cell with an internal RE is constructed to investigate the mechanism of the blocking effect. The internal RE blocks the path of local current flow in the electrolyte, and decreases the electrochemical reaction rate of particles in the anode and cathode, leading to measurement errors. Characteristic lengths of RE and applied currents were examined as parameters in the finite element model to determine their effect on the magnitude of error. A useful guide is provided for proper selection of size of RE and applied current in dynamic tests of lithium-ion batteries.

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Section: Introductionmentioning

confidence: 99%

Testing Lithium-Ion Battery with the Internal Reference Electrode: An Insight into the Blocking Effect

Chu

Feng

Liaw

et al. 2018

J. Electrochem. Soc.

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Interplay between electrochemical reactions and mechanical responses in silicon–graphite anodes and its impact on degradation

et al. 2021

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Durability of high-energy throughput batteries is a prerequisite for electric vehicles to penetrate the market. Despite remarkable progresses in silicon anodes with high energy densities, rapid capacity fading of full cells with silicon–graphite anodes limits their use. In this work, we unveil degradation mechanisms such as Li+ crosstalk between silicon and graphite, consequent Li+ accumulation in silicon, and capacity depression of graphite due to silicon expansion. The active material properties, i.e. silicon particle size and graphite hardness, are then modified based on these results to reduce Li+ accumulation in silicon and the subsequent degradation of the active materials in the anode. Finally, the cycling performance is tailored by designing electrodes to regulate Li+ crosstalk. The resultant full cell with an areal capacity of 6 mAh cm−2 has a cycle life of >750 cycles the volumetric energy density of 800 Wh L−1 in a commercial cell format.

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Interplay of Inhomogeneous Electrochemical Reactions with Mechanical Responses in Silicon-Graphite Anode and its Impacts on Degradation

Moon¹,

Wakita²,

Jung³

et al. 2019

Preprint

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Polarization Study and AC-Impedance Measurement in the Horizontal Plane of a Lithium-ion Battery Using Eight Reference Electrodes

Cited by 4 publications

References 27 publications

Testing Lithium-Ion Battery with the Internal Reference Electrode: An Insight into the Blocking Effect

Testing Lithium-Ion Battery with the Internal Reference Electrode: An Insight into the Blocking Effect

Interplay between electrochemical reactions and mechanical responses in silicon–graphite anodes and its impact on degradation

Interplay of Inhomogeneous Electrochemical Reactions with Mechanical Responses in Silicon-Graphite Anode and its Impacts on Degradation

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