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Title: Organosulfide-plasticized solid-electrolyte interphase layer enables stable lithium metal anodes for long-cycle lithium-sulfur batteries

Lithium metal is a promising anode candidate for the next-generation rechargeable battery due to its highest specific capacity (3860 mA h g -1) and lowest potential, but low Coulombic efficiency and formation of lithium dendrites hinder its practical application. Here, we report a self-formed flexible hybrid solid-electrolyte interphase layer through co-deposition of organosulfides/organopolysulfides and inorganic lithium salts using sulfur-containing polymers as an additive in the electrolyte. The organosulfides/organopolysulfides serve as “plasticizer” in the solid-electrolyte interphase layer to improve its mechanical flexibility and toughness. The as-formed robust solid-electrolyte interphase layers enable dendrite-free lithium deposition and significantly improve Coulombic efficiency (99% over 400 cycles at a current density of 2mAcm -2). A lithium-sulfur battery based on this strategy exhibits long cycling life (1000 cycles) and good capacity retention. This study reveals an avenue to effectively fabricate stable solid-electrolyte interphase layer for solving the issues associated with lithium metal anodes.
Authors:
 [1] ; ORCiD logo [1] ;  [2] ;  [1] ; ORCiD logo [1] ;  [2] ; ORCiD logo [1]
  1. Pennsylvania State Univ., University Park, PA (United States). Department of Mechanical and Nuclear Engineering
  2. Pennsylvania State Univ., University Park, PA (United States). Department of Chemical Engineering
Publication Date:
Report Number(s):
DOE-PENN STATE-0007795; DOE-PENNSTATE-0007795
Journal ID: ISSN 2041-1723; PII: 974
Grant/Contract Number:
EE0007795
Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 8; Journal Issue: 1; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Research Org:
Pennsylvania State Univ., University Park, PA (United States). Department of Mechanical and Nuclear Engineering; Pennsylvania State Univ., University Park, PA (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; 36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; 42 ENGINEERING; Organosulfide; Lithium-Sulfur battery; solid-electrolyte interphase; Li metal
OSTI Identifier:
1430243
Alternate Identifier(s):
OSTI ID: 1435961