Anodenmaterialien für Lithium-Ionen-Batterien

Wurm, Cǎlin; Öttinger, Oswin; Wittkämper, Stephan; Zauter, R.; Vuorilehto, K.

doi:10.1007/978-3-642-30653-2_5

Cited by 12 publications

(10 citation statements)

References 20 publications

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“…for the cathode used in the reference configuration this would yield δ c =48.95+/−0.979 μm. The material densities for calculation of solid volume fractions were taken from literature [25][26][27] and may deviate in reality, especially for the active cathode materials which are mixtures of several elements causing uncertainties for density determination. Furthermore the equation also depends on the measured electrode mass loading which is assumed to have an uncertainty of about 2 %.…”

Section: Impact Of Carbon Black Content and Cb:b Ratio-as Shown Inmentioning

confidence: 99%

Time-Efficient Reparameterization and Simulation of Manufacturing Impacts on Performance of Lithium-Ion-Batteries

Lenze

Laue

Krewer

2019

J. Electrochem. Soc.

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The high quality demands of batteries for electric vehicles require powerful tools for error detection in cell manufacturing. Furthermore, cell diagnostics is a serious challenge because performance limitations occur on atomic scale and as batteries are closed systems physical issues can hardly be detected only with the aid of experimental methods. Physico-chemical models enable to detect up to seven various mechanisms of limitations but experimental parameterization is extensive. Therefore, in this study a fast mathematical parameterization approach was used to simulate and diagnose cells with various manufacturing parameter configurations. Limitation mechanisms are shown in correlation with impacts by calendering, electrode thickness, carbon black recipe and cathode active material. Depending on the adjusted production parameters, they vary between low electronic conductivity, overpotentials due to reduction of electrochemically active solid-liquid interfacial area and low ionic conductivity. Furthermore it is shown that characteristic indicators for the particular limitation mechanisms can be observed in discharge curves at various CRates. Finally, a statistical analysis demonstrates how parameter identification can be performed computationally as a side product from reparameterization.

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Section: Impact Of Carbon Black Content and Cb:b Ratio-as Shown Inmentioning

confidence: 99%

Time-Efficient Reparameterization and Simulation of Manufacturing Impacts on Performance of Lithium-Ion-Batteries

Lenze

Laue

Krewer

2019

J. Electrochem. Soc.

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“…[52,53] Aurbach et al (1987) studied surface films formed on lithium in PC solutions of LiAsF 6 , LiClO 4 , and LiSO 3 CF 3 with FTIR, XPS, and IR. Lithium alkyl carbonates (RCO 3 Li) were mainly detected in the initial films. Systems containing EC showed the formation of lithium ethyl carbonate (CH 3 CH 2 CO 3 Li).…”

Section: Sei For Negative Electrodes In Libsmentioning

confidence: 99%

“…[70,71] 2) Formation of a polymer/gel-like film that exhibits pseudocapacitive character. [26] 3) A direct capacity contribution of SEI species, e. g. CO 3 2À that undergoes redox reactions and is reduced to low valence C species, [28,29] or the reversible reaction of LiOH with lithium leading to Li 2 O and LiH (identified for RuO 2 electrodes). [30] Already in earlier publications about nano-sized TMOs, Tarascon's group described the accompaniment of the interaction between lithium and metal oxides (resulting in metallic nanoparticles finely dispersed in a Li 2 O matrix), by the formation of an inorganic solid electrolyte interphase, e. g. SEI (at higher potentials around 0.7 V for CoO/Li cells), similar to processes observed for carbonaceous electrode materials.…”

Section: Film Formation Processes On Surfaces Of Negative Electrodes mentioning

confidence: 99%

“…Presently, graphite and its modified derivatives are widely employed as LIB negative electrodes. To a smaller extent, amorphous carbons, lithium titanate, or lithium metal alloys based on silicon and tin are also being utilized …”

Section: Introductionmentioning

confidence: 99%

“…To a smaller extent, amorphous carbons, lithium titanate, or lithium metal alloys based on silicon and tin are also being utilized. [3] In addition, nano-sized transition metal oxides (TMOs) are identified as a new class of materials that show high potential as negative electrodes. The interaction of Li + with nano-sized TMOs in the solid state attracted high attention since it was presented by Tarascon's research team in 2000.…”

Section: Introductionmentioning

confidence: 99%

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Interfacial Phenomena/Capacities Beyond Conversion Reaction Occurring in Nano‐sized Transition‐Metal‐Oxide‐Based Negative Electrodes in Lithium‐Ion Batteries: A Review

Keppeler

Srinivasan

2017

ChemElectroChem

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Nano‐sized transition‐metal oxides are of topical interest in current research towards high‐capacity negative electrodes for rechargeable lithium‐ion batteries. Schematically, an interaction with Li+ through a conversion reaction is commonly accepted. However, experimentally observed capacities often significantly exceed the correlating theoretical quantity of transferred charge carriers based on the conversion reaction. The origin of the additional capacity is under intense debate, although the indispensability of interfacial phenomena and material dimensions in the nanometer regime for concrete explanations are widely observed. Scenarios associated with additional capacities are electrode/electrolyte interphases (solid‐electrolyte interphase, polymer/gel‐like film), additional Li+ accommodation through reaction with grain boundary phases in nanostructures, interfacial Li+ accommodation along with charge separation at phase boundaries, or additional Li+ uptake in unique structural architectures with high specific surface areas that often exhibit an extensive hierarchical meso‐ and/or nanoporous system. In addition, interfacial phenomena are strongly related to battery safety, and hence a topic of highest relevance. As the number of related articles has become so intense, this Review article provides an up‐to‐date summary, and a first attempt is made to systematically classify capacity profiles of nano‐sized transition‐metal oxides that exhibit additional capacities beyond the theoretical value based on the concept of conversion reaction.

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Sander

2024

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Anodenmaterialien für Lithium-Ionen-Batterien

Cited by 12 publications

References 20 publications

Time-Efficient Reparameterization and Simulation of Manufacturing Impacts on Performance of Lithium-Ion-Batteries

Time-Efficient Reparameterization and Simulation of Manufacturing Impacts on Performance of Lithium-Ion-Batteries

Interfacial Phenomena/Capacities Beyond Conversion Reaction Occurring in Nano‐sized Transition‐Metal‐Oxide‐Based Negative Electrodes in Lithium‐Ion Batteries: A Review

Brandrisiko von Elektrofahrzeugen in Parkgaragen

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