Stable lithium electrodeposition in liquid and nanoporous solid electrolytes.

By Yingying Lu, Zhengyuan Tu, L. Archer. Nature Materials, 2014

1,410 citations recorded by the source corpus.

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.

Subfields: Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/c2ac98a5d079ae9b8589c548716f216b0c69b663

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Citations in the corpus

• An In Vivo Formed Solid Electrolyte Surface Layer Enables Stable Plating of Li Metal (2017, background): “Complete solvation of the additive is advantageous in creating a homogeneous SEI layer, in contrast to an LiF microparticlecovered Li surface.21 We note that elemental sulfur, although it reacts with Li to yield Li2S, cannot serve as a coupling agent with P2S5 as it does not co-dissolve with P2S5.”
• Alkali Metal Anodes for Rechargeable Batteries (2019, neutral): “84 A 30 mol % LiF additive in a 1 M LiTFSI/PC electrolyte enabled the development of a conformal crystalline SEI film, leading to smooth Li deposition without dendrites and 25-fold enhancement in the lifetime of symmetric Li/Li cells.(85) Similarly, an electrolyte comprising 1 M LiF3SO3 in tetraethy”