Journal article
Poor Man's Atomic Layer Deposition of LiF for Additive-Free Growth of Lithium Columns
Nano letters, v 18(11), pp 7066-7074
14 Nov 2018
PMID: 30296106
Abstract
Lithium metal is an ideal material for high-energy, cost-effective rechargeable energy storage systems. The thermodynamically unfavorable solid liquid interface between the lithium metal and organic electrolyte necessitates the formation of an interlayer (SEI) which is known to have significant impact on lithium morphologies. Less well understood is the impact of the current collector substrate on the morphology of electrodeposited lithium. Here we report on the morphology of electrodeposited lithium as a function of the chemical pretreatments of the working electrode. We find that a copper substrate pretreatment with acidic solutions (sulfuric, oxalic, or acetic acid) results in the deposition of close-packed lithium columns with a uniform diameter. A controlled study of the pre-electrodeposited copper surface indicates that the formation of a 5-8 nm thick LiF protective layer on copper substrate from a chemical reaction between adsorbed surface water layer in acidic solutions and LiPF6 electrolyte is the key process in the electrochemical growth of lithium columns. We anticipate that this simple chemical approach can be generalized as a scalable, low-cost, additive-free substrate treatment method for depositing a LiF protective layer, broadly applicable in the development of uniform lithium films.
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Details
- Title
- Poor Man's Atomic Layer Deposition of LiF for Additive-Free Growth of Lithium Columns
- Creators
- Wesley Chang - Princeton UniversityJeung Hun Park - Princeton UniversityDaniel A. Steingart - Princeton University
- Publication Details
- Nano letters, v 18(11), pp 7066-7074
- Publisher
- Amer Chemical Soc
- Number of pages
- 9
- Grant note
- Alpha-En Corporation Mercedes-Benz Research & Development North America, Inc.
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Mechanical Engineering and Mechanics
- Web of Science ID
- WOS:000451102100055
- Scopus ID
- 2-s2.0-85055518424
- Other Identifier
- 991021889831404721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Chemistry, Multidisciplinary
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology
- Physics, Applied
- Physics, Condensed Matter