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Virtual electrode design of thick Li-Ion batteries

Danner, Timo and Hein, Simon and Westhoff, Daniel and Haselrieder, Wolfgang and Schmidt, Volker and Kwade, Arno and Latz, Arnulf (2017) Virtual electrode design of thick Li-Ion batteries. 232nd ECS MEETING, 01.-06. Okt. 2017, National Harbor, MD, USA.

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Li-Ion batteries are commonly used in portable electronic devices due to their outstanding energy and power density. A remaining issue which hinders the breakthrough e.g. in the automotive sector is the high production cost. Going ‘giga’ is one approach currently pursued but requires large investments. Recently, battery concepts with thick electrodes were presented as attractive alternative1. Batteries with thicker electrodes provide higher theoretical energy densities with only a few electrode layers which reduces production time and cost2. In our contribution we present 3D micro-structure resolved simulations of thick (electrodes > 300µm) Graphite-NMC batteries based on our thermodynamically consistent simulation framework BEST3. The parametrization and validation of our model is presented in a recent publication4 and simulation results agree favourably with experimental data2. As a major problem we identified transport limitations in the electrolyte at comparatively small C-rates2,4. Novel design and operation strategies of the battery and its components are needed to mitigate this issue. In this presentation we will focus on our on-going electrode design studies. Two different design concepts using laser perforation and/or porosity gradients were evaluated regarding their performance at high C-rates. Therefore, multiple realizations of electrode structures were generated with a stochastic 3D geometry generator5. The structures and corresponding electrochemical simulations were validated against tomography and experimental data of model electrodes. The virtual screening of different configurations provides material-structure-function relationships which are a helpful tool for the processing of thick electrodes on larger scales. 1. Hopkins, B. J. et al, Component-cost and performance based comparison of flow and static batteries. J. Power Sources 293, 1032–1038 (2015). 2. Singh, M. et al, Thick Electrodes for High Energy Lithium Ion Batteries. J. Electrochem. Soc. 162, A1196–A1201 (2015). 3. Latz, A. et al, Multiscale modeling of lithium ion batteries: thermal aspects. Beilstein J. Nanotechnol. 6, 987–1007 (2015). 4. Danner, T. et al. Thick electrodes for Li-ion batteries: A model based analysis. J. Power Sources 334, 191–201 (2016). 5. Westhoff, D. et al. Parametric stochastic 3D model for the microstructure of anodes in lithium-ion power cells. Comput. Mater. Sci. 126, 453–467 (2017).

Item URL in elib:https://elib.dlr.de/116036/
Document Type:Conference or Workshop Item (Poster)
Title:Virtual electrode design of thick Li-Ion batteries
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Danner, Timotimo.danner (at) dlr.dehttps://orcid.org/0000-0003-2336-6059
Hein, SimonSimon.Hein (at) dlr.dehttps://orcid.org/0000-0002-6728-9983
Westhoff, Danieluniversity of ulmUNSPECIFIED
Haselrieder, Wolfgangipat, tu braunschweigUNSPECIFIED
Schmidt, Volkeruniversity of ulmUNSPECIFIED
Kwade, Arnoipat, tu braunschweigUNSPECIFIED
Latz, Arnulfarnulf.latz (at) dlr.deUNSPECIFIED
Date:October 2017
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Keywords:battery modeling, thick electrodes, microstructure
Event Title:232nd ECS MEETING
Event Location:National Harbor, MD, USA
Event Type:international Conference
Event Dates:01.-06. Okt. 2017
Organizer:Electrochemical Society
HGF - Research field:Energy
HGF - Program:Storage and Cross-linked Infrastructures
HGF - Program Themes:Electrochemical Energy Storage
DLR - Research area:Energy
DLR - Program:E SP - Energy Storage
DLR - Research theme (Project):E - Electrochemical Prcesses (Batteries) (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Computational Electrochemistry
Deposited By: Danner, Timo
Deposited On:01 Dec 2017 14:17
Last Modified:31 Jul 2019 20:13

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