Interfacial Chemistry Regulation via a Skin-Grafting Strategy Enables High-Performance Lithium-Metal Batteries
- 10 October 2017
- journal article
- research article
- Published by American Chemical Society (ACS) in Journal of the American Chemical Society
- Vol. 139 (43), 15288-15291
- https://doi.org/10.1021/jacs.7b06437
Abstract
The lithium (Li) metal anode suffers severe interfacial instability from its high reactivity towards liquid electrolytes, especially carbonate-based electrolytes, resulting in poor electrochemical performance of batteries that use 4-V high-capacity cathodes. We report a new skin-grafting strategy that stabilizes the Li metal-liquid electrolyte interface by coating the Li metal surface with poly((N-2,2-dimethyl-1,3-dioxolane-4-methyl)-5-norbornene-exo-2,3-dicarboximide), a chemically and electrochemically active polymer layer. This layer, composed of cyclic ether groups with a stiff polycyclic main chain, serves as a grafted polymer skin on the Li metal anode not only to incorporate ether-based polymeric components into the solid-electrolyte interphase (SEI) but also to accommodate Li deposition/dissolution under the skin in a dendrite/moss-free manner. Consequently, a Li-metal battery employing a Li metal anode with the grafted skin paired with LiNi0.5Co0.2Mn0.3O2 cathode has a 90.0 % capacity retention after 400 charge/discharge cycles and a capacity of 1.2 mAh/cm2 in a carbonate-based electrolyte. This proof-of-concept study provides a new direction for regulating the interfacial chemistry of Li metal anodes and for enabling high-performance Li-metal batteries.Keywords
Funding Information
- Vehicle Technologies Program (DE-EE0007795)
- Division of Materials Research (DMR-1306938)
This publication has 43 references indexed in Scilit:
- Reviving the lithium metal anode for high-energy batteriesNature Nanotechnology, 2017
- A Review of Solid Electrolyte Interphases on Lithium Metal AnodeAdvanced Science, 2015
- Detection of subsurface structures underneath dendrites formed on cycled lithium metal electrodesNature Materials, 2013
- Lithium metal anodes for rechargeable batteriesEnergy & Environmental Science, 2013
- The Li-Ion Rechargeable Battery: A PerspectiveJournal of the American Chemical Society, 2013
- Erratum: Li–O2 and Li–S batteries with high energy storageNature Materials, 2011
- A short review of failure mechanisms of lithium metal and lithiated graphite anodes in liquid electrolyte solutionsSolid State Ionics, 2002
- Issues and challenges facing rechargeable lithium batteriesNature, 2001
- Review of selected electrode–solution interactions which determine the performance of Li and Li ion batteriesJournal of Power Sources, 2000
- The Application of Atomic Force Microscopy for the Study of Li Deposition ProcessesJournal of the Electrochemical Society, 1996