3D microstructure design of lithium-ion battery electrodes assisted by X-ray nano-computed tomography and modelling

Driving range and fast charge capability of electric vehicles are heavily dependent on the 3D microstructure of lithium-ion batteries (LiBs) and substantial fundamental research is required to optimise electrode design for specific operating conditions. Here we have developed a full microstructure-r...

Celý popis

Uložené v:
Podrobná bibliografia
Vydané v:Nature communications Ročník 11; číslo 1; s. 2079 - 13
Hlavní autori: Lu, Xuekun, Bertei, Antonio, Finegan, Donal P., Tan, Chun, Daemi, Sohrab R., Weaving, Julia S., O’Regan, Kieran B., Heenan, Thomas M. M., Hinds, Gareth, Kendrick, Emma, Brett, Dan J. L., Shearing, Paul R.
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: London Nature Publishing Group UK 29.04.2020
Nature Publishing Group
Nature Portfolio
Predmet:
119/118
639/166/898
639/301/930/2735
639/4077/4079/891
ADVANCED PROPULSION SYSTEMS
Calendering
computational modeling
computational modelling
Computed tomography
Current distribution
Design optimization
Electric vehicles
Electrochemical analysis
Electrochemistry
electrode design
Electrodes
heterogeneity
Humanities and Social Sciences
Ion transport
Lithium
Lithium-ion batteries
Microstructure
multidisciplinary
NMC microstructure
Particle size distribution
Performance enhancement
Porosity
Rechargeable batteries
Science
Science (multidisciplinary)
Size distribution
solid-state diffusion
Superposition (mathematics)
Three dimensional models
Tortuosity
X-ray computed tomography
ISSN:2041-1723, 2041-1723
On-line prístup:Získať plný text
Tagy: Pridať tag
Žiadne tagy, Buďte prvý, kto otaguje tento záznam!
Popis
Shrnutí:Driving range and fast charge capability of electric vehicles are heavily dependent on the 3D microstructure of lithium-ion batteries (LiBs) and substantial fundamental research is required to optimise electrode design for specific operating conditions. Here we have developed a full microstructure-resolved 3D model using a novel X-ray nano-computed tomography (CT) dual-scan superimposition technique that captures features of the carbon-binder domain. This elucidates how LiB performance is markedly affected by microstructural heterogeneities, particularly under high rate conditions. The elongated shape and wide size distribution of the active particles not only affect the lithium-ion transport but also lead to a heterogeneous current distribution and non-uniform lithiation between particles and along the through-thickness direction. Building on these insights, we propose and compare potential graded-microstructure designs for next-generation battery electrodes. To guide manufacturing of electrode architectures, in-situ X-ray CT is shown to reliably reveal the porosity and tortuosity changes with incremental calendering steps. The 3D microstructure of the electrode predominantly determines the electrochemical performance of Li-ion batteries. Here, the authors show that the microstructural heterogeneities lead to non-uniform Li insertion and current distribution while graded-microstructures improve the performance.
Bibliografia:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 14
content type line 23
NREL/JA-5400-75812
AC36-08GO28308; EP/R020973/1; EP/M028100/1; EP/S003053/1; FIRG003; FIRG001; CiET1718\59
Royal Academy of Engineering
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Vehicle Technologies Office
Faraday Institution
Engineering and Physical Sciences Resource Council (EPSRC)
ISSN:2041-1723
2041-1723
DOI:10.1038/s41467-020-15811-x