Towards high rate Li metal anodes: enhanced performance at high current density in a superconcentrated ionic liquid
- Deakin Univ., Melbourne, VIC (Australia). ARC CEnter of Excellence for Electromaterials Science, Inst. for Frontier Materials
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Monash Univ., VIC (Australia). ARC CEnter of Excellence for Electromaterials Science
Although high energy density and fast charging rates are vital for future advanced battery applications such as electric vehicles (EVs), the impact of fast charge rates is not widely investigated for key technologies such as those based on lithium metal. In this work, for the first time, Li metal deposition/dissolution in a superconcentrated ionic liquid (IL) is demonstrated at the high current densities necessary for fast charge technologies. Operation at high current is shown to enhance the cycling efficiency from 64 ± 3% at 1 mA cm-2 up to 96 ± 1% at 20 mA cm2 on a bare Ni substrate, providing a new path to enable these technologies. XPS, ToF-SIMS and SEM measurements revealed that a stable and LiF-dominated SEI, favourable nucleation and compact dendrite-free Li morphology enabled enhanced cycling efficiency at higher currents.
- Research Organization:
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office; Australian Research Council
- Grant/Contract Number:
- AC36-08GO28308; CE140100012
- OSTI ID:
- 1606311
- Report Number(s):
- NREL/JA-5K00-75576; MainId:19866; UUID:a0392d86-8517-ea11-9c2a-ac162d87dfe5; MainAdminID:8343
- Journal Information:
- Journal of Materials Chemistry. A, Vol. 8, Issue 7; ISSN 2050-7488
- Publisher:
- Royal Society of ChemistryCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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