Simulated discharge overpotential distributions for sintered electrode batteries in rechargeable coin cell form factors

Cai, Chen; Hensley, Donovan; Koenig, Gary M.

doi:10.1016/j.est.2022.105218

Cited by 15 publications

(32 citation statements)

References 54 publications

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“…5b), and a detailed introduction of the process associated with such analysis can be found in a previous report. 14 In brief, the overpotentials associated with ionic resistance, electronic resistance, interfacial resistance, and OCV differences are calculated at different depths within the cell during the discharge simulation. These overpotentials are then weighted by the electrochemical current being produced at each location, and then summed.…”

Section: Resultsmentioning

confidence: 99%

“…Detailed description of the methods and calculations to extract overpotential distributions from P2D simulations can be found in a previous publication. 14…”

Section: Energy Advances Papermentioning

confidence: 99%

“…Thus, the overpotential from ion transport through the electrode microstructure was greater for the LCO electrodes relative to LNMO electrodes. Ion transport through the electrode microstructure has previously been demonstrated to be a major limiting factor for thick AAM electrodes, 9,11,13,14 and the higher porosity for the LNMO would improve the relative ionic conductivity of these electrodes. At higher rates such as C/5 the AAM LMNO delivered very low capacity (6 mA h g À1 ), suggesting the low electronic conductivity of LNMO (0%LCO) was too resistive at that rate to facilitate much of the electrode achieving high extents of lithiation.…”

Section: Pure Lco Cathode Cells Electrochemical Evaluationmentioning

confidence: 99%

“…However, with thicker electrodes, the rate limiting process shifts from resistances due to solid-state diffusion and/or the electroactive interface and towards ionic transport through the microstructure, which includes both depletion of accessible Li + concentrations in the electrolyte and increased ionic resistance due to long transport path lengths. [6][7][8][9][10][11][12][13][14] When conventional composite electrodes are used, the ion transport is even more restrictive due to inactive binder and conductive additives in the interstitial regions of the electrode, resulting in high tortuosity. Conventional composite electrode tortuosity has been reported with values up to 9, with corresponding Bruggeman exponents up to 4.5; compared to exponents of 1 for perfectly aligned pores and 1.5 often assumed for packed spheres.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Enhancing low electronic conductivity materials in all active material electrodes through multicomponent architecture

Cai

Koenig

2023

Energy Adv.

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Section: Resultsmentioning

confidence: 99%

“…Detailed description of the methods and calculations to extract overpotential distributions from P2D simulations can be found in a previous publication. 14…”

Section: Energy Advances Papermentioning

confidence: 99%

Section: Pure Lco Cathode Cells Electrochemical Evaluationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Enhancing low electronic conductivity materials in all active material electrodes through multicomponent architecture

Cai

Koenig

2023

Energy Adv.

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“…This necessitates the use of electroactive material with reasonable electronic conductivity across the range of extents of lithiation experienced by the material. [ 23 ] As a consequence, materials such as lithium titanate (Li 4 Ti 5 O 12 ) and lithium cobalt oxide (LiCoO 2 ) have reported lower cell polarization for otherwise identical electrodes than materials with lower electronic conductivity such as LiMn 2 O 4 . [ 24 ] A low electronic conductivity material such as S would not be suitable in an all‐electroactive material cathode; however, Te has an initial conductivity of

2 \times 10^{2}

S m −1 which suggested that it could be processed into a sintered electrode configuration and successfully deliver electrochemical capacity.…”

Section: Introductionmentioning

confidence: 99%

Sintered Porous Tellurium Pellet Lithium Battery Electrodes

2023

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Thick sintered porous tellurium pellets are fabricated and evaluated as cathodes in lithium–tellurium batteries. These electrodes lack inactive binders and conductive additives and have very high areal capacity, which are important attributes for increasing cell energy density. More commonly tellurium in lithium–tellurium batteries is processed via melt impregnation into a conductive host. In contrast, herein, porous sintered electrodes comprising only tellurium material dramatically increase the areal active material loading to 150 mg cm−2 compared to the typically reported <5 mg cm−2. A processing route is used on the tellurium powder to reduce the particle size and increase the electroactive area by a factor of 13. With the increased surface area, gravimetric capacity increased for the same current density and retention of capacity at increasing rates has even greater improvement. Thick all active material–sintered tellurium electrodes provide a route toward high volumetric energy density batteries, where the relatively high electronic conductivity of tellurium is expected to be beneficial due to the lack of conductive additives in the electrode system.

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Overview on Theoretical Simulations of Lithium‐Ion Batteries and Their Application to Battery Separators

Miranda

Gonçalves

Wuttke

et al. 2023

Advanced Energy Materials

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For the proper design and evaluation of next‐generation lithium‐ion batteries, different physical‐chemical scales have to be considered. Taking into account the electrochemical principles and methods that govern the different processes occurring in the battery, the present review describes the main theoretical electrochemical and thermal models that allow simulation of the performance of lithium‐ion batteries, including different materials and components (electrodes and separators) and battery geometries. As the separator plays an essential role in the performance and safety of lithium‐ion batteries, the recent theoretical simulation work for this battery component are shown, with particular emphasis on morphology, dendrite growth, ionic transport, and mechanical properties. Further theoretical simulations and modeling of this battery component are still required for improving performance, taking into consideration varying geometric parameters such as pore size, porosity, and tortuosity as well as the optimization of the lithium diffusion process and ionic conductivity value. Theoretical simulations of battery separators will play an essential role in the new generation of lithium‐ion batteries, allowing the improvement of their performance while reducing experimental probes and time.

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Simulated discharge overpotential distributions for sintered electrode batteries in rechargeable coin cell form factors

Cited by 15 publications

References 54 publications

Enhancing low electronic conductivity materials in all active material electrodes through multicomponent architecture

Enhancing low electronic conductivity materials in all active material electrodes through multicomponent architecture

Sintered Porous Tellurium Pellet Lithium Battery Electrodes

Overview on Theoretical Simulations of Lithium‐Ion Batteries and Their Application to Battery Separators

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