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Dendrite-Free and Stable Lithium Metal Anodes Enabled by an Antimony-Based Lithiophilic Interphase
journal contribution
posted on 2019-08-25, 20:29 authored by Tao Chen, Weihua Kong, Peiyang Zhao, Huinan Lin, Yi Hu, Renpeng Chen, Wen Yan, Zhong JinRechargeable
lithium metal batteries are of tremendous interest
due to the high theoretical capacity and low reduction potential of
lithium metal anode. However, the formation of unstable solid electrolyte
interphase (SEI) results in lithium dendrite growth and low Coulombic
efficiency during Li plating/stripping processes. Herein, we report
an effective strategy to stabilize Li metal anode by in situ constructing
antimony-based lithiophilic interphase on Li anode (Sb–Li)
using antimony triiodide-tetrahydrofuran (THF) solution. The antimony-based
lithiophilic interphase is composed of amorphous antimony and lithium
compounds, revealed by in-depth X-ray photoelectron spectroscopy.
The Sb–Li anode enables dendrite-free Li deposition in both
ether- and ester-based electrolytes. As a result, as-assembled lithium–sulfur
(Li–S) batteries with Sb–Li anode exhibit an initial
capacity of 915 mAh g–1 at 1.0 C and a capacity
retention >83% after 400 cycles. Operando Raman
analysis
confirmed that the antimony-based lithiophilic interphase can prevent
parasitic side reactions, and also relieve the shuttle effect of polysulfides.
Furthermore, Sb–Li|LiFePO4 cells have also realized
high rate performance and stable cyclability. We expect this effective
strategy for stabilizing Li metal anode will provide a valuable route
to develop high-energy Li metal batteries.
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Keywords
Li metal batteriesTHFlithium metal anodelithium dendrite growthelectrolyte interphaseshuttle effectlithium compoundscapacityCoulombic efficiencyester-based electrolytesside reactions1.0 CSEILi anodeSbdendrite-free Li depositionrate performanceLi metal anodeAntimony-Based Lithiophilic Interphase Rechargeable lithium metal batteriesStable Lithium Metal Anodes EnabledX-ray photoelectron spectroscopy400 cyclesOperando Raman analysisantimony triiodide-tetrahydrofuranantimony-based lithiophilic interphase
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