AI Article Synopsis
- - Metallic anodes like lithium, sodium, and zinc have great potential for rechargeable batteries but face issues with uneven metal deposition and unstable solid-electrolyte interfaces (SEI).
- - Researchers used a molecule called benzenesulfonyl fluoride attached to reduced graphene oxide to create a stable interface, allowing for even lithium deposition and enhancing the SEI.
- - This method achieved high-efficiency lithium deposition with minimal energy loss and impressive battery stability, retaining 85.3% capacity after 400 cycles and functioning well even at low temperatures, with similar applications for sodium and zinc anodes.
Article Abstract
Metallic anodes (lithium, sodium, and zinc) are attractive for rechargeable battery technologies but are plagued by an unfavorable metal-electrolyte interface that leads to nonuniform metal deposition and an unstable solid-electrolyte interphase (SEI). Here we report the use of electrochemically labile molecules to regulate the electrochemical interface and guide even lithium deposition and a stable SEI. The molecule, benzenesulfonyl fluoride, was bonded to the surface of a reduced graphene oxide aerogel. During metal deposition, this labile molecule not only generates a metal-coordinating benzenesulfonate anion that guides homogeneous metal deposition but also contributes lithium fluoride to the SEI to improve Li surface passivation. Consequently, high-efficiency lithium deposition with a low nucleation overpotential was achieved at a high current density of 6.0 mA cm A Li|LiCoO cell had a capacity retention of 85.3% after 400 cycles, and the cell also tolerated low-temperature (-10 °C) operation without additional capacity fading. This strategy was applied to sodium and zinc anodes as well.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7720105 | PMC |
| http://dx.doi.org/10.1073/pnas.2001837117 | DOI Listing |
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