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Title: Molecular understanding of polyelectrolyte binders that actively regulate ion transport in sulfur cathodes

Journal Article · · Nature Communications
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3];  [4];  [5];  [1];  [4]; ORCiD logo [6]; ORCiD logo [6]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Joint Center for Energy Storage Research
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Molecular Foundry
  3. Argonne National Lab. (ANL), Argonne, IL (United States). Joint Center for Energy Storage Research
  4. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Dept. of Materials Science and Engineering
  5. Univ. of California, Berkeley, CA (United States). Dept. of Chemistry
  6. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Joint Center for Energy Storage Research, Molecular Foundry

Polymer binders in battery electrodes may be either active or passive. This distinction depends on whether the polymer influences charge or mass transport in the electrode. Although it is desirable to understand how to tailor the macromolecular design of a polymer to play a passive or active role, design rules are still lacking, as is a framework to assess the divergence in such behaviors. Here, we reveal the molecular-level underpinnings that distinguish an active polyelectrolyte binder designed for lithium–sulfur batteries from a passive alternative. The binder, a cationic polyelectrolyte, is shown to both facilitate lithium-ion transport through its reconfigurable network of mobile anions and restrict polysulfide diffusion from mesoporous carbon hosts by anion metathesis, which we show is selective for higher oligomers. Furthermore, these attributes allow cells to be operated for >100 cycles with excellent rate capability using cathodes with areal sulfur loadings up to 8.1mgcm–2.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
SC-22.2 USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; USDOE Office of Science (SC), Office of Basic Energy Sciences (BES) (SC-22). Joint Center for Energy Storage Research (JCESR); USDOE Office of Science (SC), National Energy Research Scientific Computing Center (NERSC); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division
Grant/Contract Number:
AC02-05CH11231; AC02-06CH11357
OSTI ID:
1417620
Alternate ID(s):
OSTI ID: 1489228
Journal Information:
Nature Communications, Vol. 8, Issue 1; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 117 works
Citation information provided by
Web of Science

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Heterogeneous/Homogeneous Mediators for High-Energy-Density Lithium-Sulfur Batteries: Progress and Prospects journal June 2018
Current Status and Future Prospects of Metal–Sulfur Batteries journal May 2019
Highly stable lithium metal battery with an applied three-dimensional mesh structure interlayer journal January 2018
A Review of Functional Binders in Lithium-Sulfur Batteries journal October 2018
Rational Design of Binders for Stable Li‐S and Na‐S Batteries journal December 2019
High performance potassium–sulfur batteries based on a sulfurized polyacrylonitrile cathode and polyacrylic acid binder journal January 2018
Ionic Liquids and their Polymers in Lithium‐Sulfur Batteries journal January 2019
Metal Coated Polypropylene Separator with Enhanced Surface Wettability for High Capacity Lithium Metal Batteries journal November 2019
Stabilization of Li–S batteries with a lean electrolyte via ion-exchange trapping of lithium polysulfides using a cationic, polybenzimidazolium binder journal January 2020
Free-Standing Sulfur and Graphitic Porous Carbon Nanofibers Composite Cathode for High Electrochemical Performance of Lithium–Sulfur Batteries journal January 2018
Bioinspired Binders Actively Controlling Ion Migration and Accommodating Volume Change in High Sulfur Loading Lithium–Sulfur Batteries journal November 2019
An adaptive and stable bio-electrolyte for rechargeable Zn-ion batteries journal January 2018
Housing Sulfur in Polymer Composite Frameworks for Li–S Batteries journal February 2019
PIM-1-based carbon–sulfur composites for sodium–sulfur batteries that operate without the shuttle effect journal January 2020
Interfacial active fluorine site-induced electron transfer on TiO 2 (001) facets to enhance polysulfide redox reactions for better liquid Li 2 S 6 -Based lithium–sulfur batteries journal January 2019
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Natural Vermiculite Enables High‐Performance in Lithium–Sulfur Batteries via Electrical Double Layer Effects journal May 2019
Research Progress of the Solid State Lithium-Sulfur Batteries journal October 2019

Figures / Tables (5)