Microwave Processed, Onionlike Carbon and Fluoropolymer Passivated Lithium Metal Electrode for Enhanced Li Stripping/Plating Performance

Kewei Liu, Yanfeng Xia, Chung Fu Cheng, Xuhui Xia, Feng Zou, Bryan D. Vogt, Yu Zhu

Research output: Contribution to journalArticle

Abstract

One key limitation of lithium metal electrodes is their propensity for dendrite formation that limits their use in commercial batteries. Here, a simple surface modification method was demonstrated to improve the electrochemical stability of the lithium metal electrode through direct coating of onionlike carbon (OC) and a fluoropolymer onto the lithium metal electrode. Selective and rapid microwave heating of the OC resulted in the in situ formation of a LiF-rich composite with the simultaneous infiltration of lithium into the OC. The electrochemical stability of the modified electrode was compared with a neat lithium metal electrode using symmetric stripping/plating cells. The microwave processed surface coating acted as a robust and stable passivation layer to prevent electrolyte decomposition, while also suppressing fast dendrite growth. The potential stability during the stripping and plating was enhanced at all rates examined (0.5-2 mA/cm2) by this passivation layer. With the stripping/plating capacity of 1 mA h/cm2, the microwave processed lithium metal electrode can be cycled over 1000 h at a current density of 0.5 mA/cm2. These results demonstrated that microwave treatment is a promising method for selective modification of the lithium metal electrode to improve its performance in energy storage applications.

Original languageEnglish (US)
JournalACS Applied Energy Materials
DOIs
StateAccepted/In press - Jan 1 2019

Fingerprint

Fluorine containing polymers
Lithium
Plating
Carbon
Metals
Microwaves
Electrodes
Passivation
Coatings
Dendrites (metallography)
Microwave heating
Infiltration
Energy storage
Electrolytes
Surface treatment
Current density
Decomposition
Composite materials

All Science Journal Classification (ASJC) codes

  • Chemical Engineering (miscellaneous)
  • Energy Engineering and Power Technology
  • Electrochemistry
  • Materials Chemistry
  • Electrical and Electronic Engineering

Cite this

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title = "Microwave Processed, Onionlike Carbon and Fluoropolymer Passivated Lithium Metal Electrode for Enhanced Li Stripping/Plating Performance",
abstract = "One key limitation of lithium metal electrodes is their propensity for dendrite formation that limits their use in commercial batteries. Here, a simple surface modification method was demonstrated to improve the electrochemical stability of the lithium metal electrode through direct coating of onionlike carbon (OC) and a fluoropolymer onto the lithium metal electrode. Selective and rapid microwave heating of the OC resulted in the in situ formation of a LiF-rich composite with the simultaneous infiltration of lithium into the OC. The electrochemical stability of the modified electrode was compared with a neat lithium metal electrode using symmetric stripping/plating cells. The microwave processed surface coating acted as a robust and stable passivation layer to prevent electrolyte decomposition, while also suppressing fast dendrite growth. The potential stability during the stripping and plating was enhanced at all rates examined (0.5-2 mA/cm2) by this passivation layer. With the stripping/plating capacity of 1 mA h/cm2, the microwave processed lithium metal electrode can be cycled over 1000 h at a current density of 0.5 mA/cm2. These results demonstrated that microwave treatment is a promising method for selective modification of the lithium metal electrode to improve its performance in energy storage applications.",
author = "Kewei Liu and Yanfeng Xia and Cheng, {Chung Fu} and Xuhui Xia and Feng Zou and Vogt, {Bryan D.} and Yu Zhu",
year = "2019",
month = "1",
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doi = "10.1021/acsaem.9b01416",
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journal = "ACS Applied Energy Materials",
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Microwave Processed, Onionlike Carbon and Fluoropolymer Passivated Lithium Metal Electrode for Enhanced Li Stripping/Plating Performance. / Liu, Kewei; Xia, Yanfeng; Cheng, Chung Fu; Xia, Xuhui; Zou, Feng; Vogt, Bryan D.; Zhu, Yu.

In: ACS Applied Energy Materials, 01.01.2019.

Research output: Contribution to journalArticle

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AU - Zou, Feng

AU - Vogt, Bryan D.

AU - Zhu, Yu

PY - 2019/1/1

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