Multiscale dynamics of charging and plating in graphite electrodes coupling operando microscopy and phase-field modelling
Journal Article
·
· Nature Communications
The phase separation dynamics in graphitic anodes significantly affects lithium plating propensity, which is the major degradation mechanism that impairs the safety and fast charge capabilities of automotive lithium-ion batteries. In this study, we present comprehensive investigation employing operando high-resolution optical microscopy combined with non-equilibrium thermodynamics implemented in a multi-dimensional (1D+1D to 3D) phase-field modeling framework to reveal the rate-dependent spatial dynamics of phase separation and plating in graphite electrodes. Here we visualize and provide mechanistic understanding of the multistage phase separation, plating, inter/intra-particle lithium exchange and plated lithium back-intercalation phenomena. A strong dependence of intra-particle lithiation heterogeneity on the particle size, shape, orientation, surface condition and C-rate at the particle level is observed, which leads to early onset of plating spatially resolved by a 3D image-based phase-field model. Moreover, we highlight the distinct relaxation processes at different state-of-charges (SOCs), wherein thermodynamically unstable graphite particles undergo a drastic intra-particle lithium redistribution and inter-particle lithium exchange at intermediate SOCs, whereas the electrode equilibrates much slower at low and high SOCs. These physics-based insights into the distinct SOC-dependent relaxation efficiency provide new perspective towards developing advanced fast charge protocols to suppress plating and shorten the constant voltage regime.
- Research Organization:
- National Renewable Energy Laboratory (NREL), Golden, CO (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Vehicle Technologies Office
- Grant/Contract Number:
- AC36-08GO28308
- OSTI ID:
- 2005600
- Alternate ID(s):
- OSTI ID: 1999664
- Report Number(s):
- NREL/JA--5700-82021; MainId:82794; UUID:3ed7aafb-dac8-44bb-9000-45b88f7ac735; MainAdminID:70761
- Journal Information:
- Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 14; ISSN 2041-1723
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Operando video microscopy of Li plating and re-intercalation on graphite anodes during fast charging
Quantification of Dead Lithium on Graphite Anode under Fast Charging Conditions
Quantification of Dead Lithium on Graphite Anode under Fast Charging Conditions
Journal Article
·
Mon Oct 18 00:00:00 EDT 2021
· Journal of Materials Chemistry. A
·
OSTI ID:1924793
Quantification of Dead Lithium on Graphite Anode under Fast Charging Conditions
Journal Article
·
Thu Apr 14 00:00:00 EDT 2022
· Journal of the Electrochemical Society
·
OSTI ID:1867590
Quantification of Dead Lithium on Graphite Anode under Fast Charging Conditions
Journal Article
·
Thu Apr 14 00:00:00 EDT 2022
· Journal of the Electrochemical Society
·
OSTI ID:1863311