We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Stable lithium electrodeposition in liquid and nanoporous solid electrolytes.
- Authors
Lu, Yingying; Tu, Zhengyuan; Archer, Lynden A.
- Abstract
Rechargeable lithium, sodium and aluminium metal-based batteries are among the most versatile platforms for high-energy, cost-effective electrochemical energy storage. Non-uniform metal deposition and dendrite formation on the negative electrode during repeated cycles of charge and discharge are major hurdles to commercialization of energy-storage devices based on each of these chemistries. A long-held view is that unstable electrodeposition is a consequence of inherent characteristics of these metals and their inability to form uniform electrodeposits on surfaces with inevitable defects. We report on electrodeposition of lithium in simple liquid electrolytes and in nanoporous solids infused with liquid electrolytes. We find that simple liquid electrolytes reinforced with halogenated salt blends exhibit stable long-term cycling at room temperature, often with no signs of deposition instabilities over hundreds of cycles of charge and discharge and thousands of operating hours. We rationalize these observations with the help of surface energy data for the electrolyte/lithium interface and impedance analysis of the interface during different stages of cell operation. Our findings provide support for an important recent theoretical prediction that the surface mobility of lithium is significantly enhanced in the presence of lithium halide salts. Our results also show that a high electrolyte modulus is unnecessary for stable electrodeposition of lithium.
- Subjects
ELECTROPLATING; LITHIUM cells; ELECTROCHEMISTRY; ELECTRIC impedance; ELECTRIC discharges
- Publication
Nature Materials, 2014, Vol 13, Issue 10, p961
- ISSN
1476-1122
- Publication type
Article
- DOI
10.1038/nmat4041