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Title: The synergetic interaction between $$\mathrm{LiNO_3}$$ and lithium polysulfides for suppressing shuttle effect of lithium-sulfur batteries

Journal Article · · Energy Storage Materials
 [1];  [1];  [2];  [3];  [1];  [4]
  1. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
  2. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
  3. Wuhan University (China)
  4. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS); University of California, Santa Cruz, CA (United States)

LiNO3 has been widely used as an effective electrolyte additive in lithium-sulfur (Li-S) batteries to suppress the polysulfide shuttle effect. To better understand the mechanism of suppressed shuttle effect by LiNO3, herein we report a comprehensive investigation of the influence of LiNO3 additive on the formation process of the solid electrolyte interphase (SEI) layer on lithium anode of Li-S batteries by operando X-ray absorption spectroscopy (XAS). We observed that a compact and stable SEI layer composed of Li2SO3 and Li2SO4 on top of lithium anode is formed during the initial discharge process due to the synergetic effect of shuttled polysulfides and LiNO3, which can effectively suppress the subsequent reaction between polysulfides in electrolyte and lithium metal and thus result in the alleviation of polysulfide shuttle effect. In contrast, when using electrolyte without LiNO3, the shuttled polysulfides continuously react with lithium metal to form insulating Li2S on lithium anode, leading to the irreversible capacity loss. Our present operando XAS study provides a valuable insight into the important role of LiNO3 for the protection of lithium anodes, which will be beneficial for the further development of new electrolyte additives for high-performance Li-S batteries.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE); USDOE Office of Science (SC), Basic Energy Sciences (BES); National Key Research and Development Program of China; National Natural Science Fund for Distinguished Young Scholars
Grant/Contract Number:
AC02-05CH11231; 2016YFA0202603; 51425204
OSTI ID:
1559789
Alternate ID(s):
OSTI ID: 1496485
Journal Information:
Energy Storage Materials, Vol. 11, Issue C; ISSN 2405-8297
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 119 works
Citation information provided by
Web of Science

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Cited By (2)

Methods to Improve Lithium Metal Anode for Li-S Batteries journal December 2019
Bi-containing Electrolyte Enables Robust and Li Ion Conductive Solid Electrolyte Interphase for Advanced Lithium Metal Anodes journal January 2020

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