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Title: Long‐Life, High‐Rate Lithium–Sulfur Cells with a Carbon‐Free VN Host as an Efficient Polysulfide Adsorbent and Lithium Dendrite Inhibitor

Journal Article · · Advanced Energy Materials
 [1]; ORCiD logo [1]
  1. Materials Science and Engineering Program &, Texas Materials Institute The University of Texas at Austin Austin TX 78712 USA

Abstract Lithium–sulfur (Li‐S) batteries are a promising next‐generation energy‐storage system, but the polysulfide shuttle and dendritic Li growth seriously hinder their commercial viability. Most of the previous studies have focused on only one of these two issues at a time. To address both the issues simultaneously, presented here is a highly conductive, noncarbon, 3D vanadium nitride (VN) nanowire array as an efficient host for both sulfur cathodes and lithium‐metal anodes. With fast electron and ion transport and high porosity and surface area, VN traps the soluble polysulfides, promotes the redox kinetics of sulfur cathodes, facilitates uniform nucleation/growth of lithium metal, and inhibits lithium dendrite growth at an unprecedented high current density of 10 mA cm −2 over 200 h of repeated plating/stripping. As a result, VN‐Li||VN‐S full cells constructed with VN as both an anode and cathode host with a negative to positive electrode capacity ratio of only ≈2 deliver remarkable electrochemical performance with a high Coulombic efficiency of ≈99.6% over 850 cycles at a high 4 C rate and a high areal capacity of 4.6 mA h cm −2 . The strategy presented here offers a viable approach to realize high‐energy‐density, safe Li‐metal‐based batteries.

Sponsoring Organization:
USDOE
Grant/Contract Number:
DE‐SC0005397
OSTI ID:
1577193
Journal Information:
Advanced Energy Materials, Journal Name: Advanced Energy Materials Vol. 10 Journal Issue: 3; ISSN 1614-6832
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English
Citation Metrics:
Cited by: 108 works
Citation information provided by
Web of Science

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