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Title: Lithium-coated polymeric matrix as a minimum volume-change and dendrite-free lithium metal anode

Lithium metal is the ideal anode for the next generation of high-energy-density batteries. Nevertheless, dendrite growth, side reactions and infinite relative volume change have prevented it from practical applications. Here, we demonstrate a promising metallic lithium anode design by infusing molten lithium into a polymeric matrix. The electrospun polyimide employed is stable against highly reactive molten lithium and, via a conformal layer of zinc oxide coating to render the surface lithiophilic, molten lithium can be drawn into the matrix, affording a nano-porous lithium electrode. Importantly, the polymeric backbone enables uniform lithium stripping/plating, which successfully confines lithium within the matrix, realizing minimum volume change and effective dendrite suppression. The porous electrode reduces the effective current density; thus, flat voltage profiles and stable cycling of more than 100 cycles is achieved even at a high current density of 5 mA cm -2 in both carbonate and ether electrolyte. Furthermore, the advantages of the porous, polymeric matrix provide important insights into the design principles of lithium metal anodes.
Authors:
 [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [2]
  1. Stanford Univ., Stanford, CA (United States)
  2. Stanford Univ., Stanford, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
Publication Date:
Grant/Contract Number:
AC02-76SF00515
Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 7; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Research Org:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE
OSTI Identifier:
1256050

Liu, Yayuan, Lin, Dingchang, Liang, Zheng, Zhao, Jie, Yan, Kai, and Cui, Yi. Lithium-coated polymeric matrix as a minimum volume-change and dendrite-free lithium metal anode. United States: N. p., Web. doi:10.1038/ncomms10992.
Liu, Yayuan, Lin, Dingchang, Liang, Zheng, Zhao, Jie, Yan, Kai, & Cui, Yi. Lithium-coated polymeric matrix as a minimum volume-change and dendrite-free lithium metal anode. United States. doi:10.1038/ncomms10992.
Liu, Yayuan, Lin, Dingchang, Liang, Zheng, Zhao, Jie, Yan, Kai, and Cui, Yi. 2016. "Lithium-coated polymeric matrix as a minimum volume-change and dendrite-free lithium metal anode". United States. doi:10.1038/ncomms10992. https://www.osti.gov/servlets/purl/1256050.
@article{osti_1256050,
title = {Lithium-coated polymeric matrix as a minimum volume-change and dendrite-free lithium metal anode},
author = {Liu, Yayuan and Lin, Dingchang and Liang, Zheng and Zhao, Jie and Yan, Kai and Cui, Yi},
abstractNote = {Lithium metal is the ideal anode for the next generation of high-energy-density batteries. Nevertheless, dendrite growth, side reactions and infinite relative volume change have prevented it from practical applications. Here, we demonstrate a promising metallic lithium anode design by infusing molten lithium into a polymeric matrix. The electrospun polyimide employed is stable against highly reactive molten lithium and, via a conformal layer of zinc oxide coating to render the surface lithiophilic, molten lithium can be drawn into the matrix, affording a nano-porous lithium electrode. Importantly, the polymeric backbone enables uniform lithium stripping/plating, which successfully confines lithium within the matrix, realizing minimum volume change and effective dendrite suppression. The porous electrode reduces the effective current density; thus, flat voltage profiles and stable cycling of more than 100 cycles is achieved even at a high current density of 5 mA cm-2 in both carbonate and ether electrolyte. Furthermore, the advantages of the porous, polymeric matrix provide important insights into the design principles of lithium metal anodes.},
doi = {10.1038/ncomms10992},
journal = {Nature Communications},
number = ,
volume = 7,
place = {United States},
year = {2016},
month = {3}
}